EXHIBIT 4.6(b)

                           AMENDMENT TO LOAN AGREEMENT


         THIS AMENDMENT TO LOAN AGREEMENT (this "AMENDMENT") is made and entered
into as of March 21, 1999 by and among INNOVATIVE VALVE TECHNOLOGIES, INC., a
Delaware corporation (the "BORROWER"); each of the Lenders which is or may from
time to time become a party to the Loan Agreement (as defined below)
(individually, a "LENDER" and, collectively, the "LENDERS") and CHASE BANK OF
TEXAS, N. A., a national banking association (previously known as Texas Commerce
Bank National Association), acting as agent for the Lenders (in such capacity,
together with its successors in such capacity, the "AGENT").

                                    RECITALS

         A. The Borrower, the Lenders and the Agent executed and delivered that
certain Loan Agreement dated as of July 7, 1998. Said Loan Agreement, as
amended, supplemented and restated, is herein called the "LOAN AGREEMENT". Any
capitalized term used in this Amendment and not otherwise defined shall have the
meaning ascribed to it in the Loan Agreement.

         B. The Borrower, the Lenders and the Agent desire to amend the Loan
Agreement in certain respects.

         NOW, THEREFORE, in consideration of the premises and the mutual
agreements, representations and warranties herein set forth, and further good
and valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, the Borrower, the Lenders and the Agent do hereby agree as
follows:

         SECTION 1.  AMENDMENTS TO LOAN AGREEMENT.

         (a) New definitions of "Additional Collateral", "Additional Collateral
Event", "Borrowing Base", "Borrowing Base Certificate", "Eligible Accounts",
"Eligible Inventory", "Free Cash Flow", "Maximum Revolving Loan Available
Amount", "Minimum Monthly EBITDA", "Monthly Financial Statements, "Over Advance
Amount" and "Stationary Term Loan Balance" are hereby added to SECTION 1.1 of
the Loan Agreement, such new definitions to read in their entireties as follows:

                  ADDITIONAL COLLATERAL shall have the meaning ascribed to such
         term in SECTION 7.8 hereof.

                  ADDITIONAL COLLATERAL EVENT shall have the meaning ascribed to
         such term in SECTION 7.8 hereof.

                  BORROWING BASE means, for any month, an amount determined as
follows:

                  (i)      80% of the aggregate amount of all Eligible Accounts 
                           of Borrower and its Subsidiaries (other than Foreign 
                           Subsidiaries) shown on the most recent Borrowing Base
                           Certificate 

                           delivered pursuant to SECTION 7.2 hereof, PLUS

                  (ii)     50% of the aggregate amount of all Eligible Inventory
                           (determined at the lower of cost or market on a
                           consistent basis) of Borrower or any of its
                           Subsidiaries (other than Foreign Subsidiaries) shown
                           on the most recent Borrowing Base Certificate
                           delivered pursuant to SECTION 7.2 hereof; PROVIDED
                           that the amount calculated pursuant to this CLAUSE
                           (II) shall not exceed 50% of the Borrowing Base, PLUS

                  (iii)    the then current Stationary Term Loan Balance, PLUS
                           or MINUS, as the case may be,

                  (iv)     the then current Over/Under Advance Amount.

         In the absence of the applicable Borrowing Base Certificate, Agent
         shall determine the Borrowing Base from time to time in its reasonable
         discretion, taking into account all information reasonably available to
         it, and the Borrowing Base from time to time so determined shall be the
         Borrowing Base for all purposes of this Agreement until the applicable
         Borrowing Base Certificate, in Proper Form, is furnished to and
         accepted by Agent. Notwithstanding anything herein to the contrary, in
         calculating the Borrowing Base, the aggregate of the amounts calculated
         under CLAUSES (I) AND (II) above shall not exceed $45,000,000.

                  BORROWING BASE CERTIFICATE shall mean a certificate, duly
         executed by the chief executive officer, chief financial officer,
         treasurer or controller of Borrower, appropriately completed and in
         substantially the form of EXHIBIT J hereto. Each Borrowing Base
         Certificate shall be effective only as accepted by Agent (and with such
         revisions, if any, as Agent may reasonably require as a condition to
         such acceptance).

                  ELIGIBLE ACCOUNTS shall mean, as at any date of determination
         thereof, each Account (both those already billed and unbilled
         receivables, i.e. work-in-process) of Borrower or any of its
         Subsidiaries (other than Foreign Subsidiaries) which is subject to a
         Lien created by any Security Document and on which Agent shall have a
         first-priority perfected Lien (subject only to Permitted Liens) which
         is at said date payable to Borrower or any such Subsidiary and which
         complies with the following requirements: (a) (i) the subject goods
         have been sold to an account debtor on an absolute sale basis on open
         account and not on consignment, on approval or on a "sale or return"
         basis or subject to any other repurchase or return agreement and no
         material part of the subject goods has been returned, rejected, lost or
         damaged, (ii) the Account is stated to be payable in Dollars and is not
         evidenced by chattel paper or an instrument of any kind (unless Agent
         has a perfected first priority Lien (subject only to Permitted Liens)
         on such chattel paper or instrument) and said account debtor is not
         insolvent or the subject of any bankruptcy or insolvency proceedings of
         any kind; (b) the account debtor must be located in the United States;
         (c) it is a valid obligation of the account debtor thereunder and is
         not subject to any offset or other defense on the part of such account
         debtor or to any claim on the part of such account debtor denying
         liability thereunder; (d) it is subject to no Lien whatsoever, except
         for the Liens created or permitted pursuant to the

                                       2

         Loan Documents; (e) to the extent applicable, it is evidenced by an
         invoice submitted to the account debtor in timely fashion and in the
         normal course of business; (f) it has not remained unpaid beyond 90
         days after the date of the invoice; (g) it does not arise out of
         transactions with an employee, officer, agent, director or stockholder
         of Borrower or any of its Subsidiaries or any Affiliate of Borrower or
         any of its Subsidiaries, and (h) each of the representations and
         warranties set forth in the Security Documents executed by Borrower and
         its Subsidiaries with respect thereto is true and correct in all
         material respects on such date. In the event of any dispute under the
         foregoing criteria, about whether an Account is or has ceased to be an
         Eligible Account, the decision of Agent, made in good faith, shall be
         conclusive and binding, absent manifest error.

                  ELIGIBLE INVENTORY shall mean, as at any date of determination
         thereof, Inventory of Borrower or any of its Subsidiaries (other than
         Foreign Subsidiaries) which is subject to a Lien created by any
         Security Documents and on which Agent shall have a first-priority
         perfected Lien (subject only to Permitted Liens) and which complies
         with the following requirements: (a) such Inventory shall be valued in
         accordance with GAAP and consist of (i) raw materials and (ii) finished
         goods (but shall not include any work-in-process), PROVIDED that all
         such Inventory shall be within the United States of America; (b) it is
         in good condition, meets all standards imposed by any Governmental
         Authority having regulatory authority over it, its use and/or sale and
         is either currently usable or currently salable in the normal course of
         business of the Borrower or its applicable Subsidiary, as the case may
         be; (c) it is not in the possession or control of any warehouseman,
         bailee, or any agent or processor for or customer of Borrower or any of
         its Subsidiaries or, if it is, (i) Borrower or its applicable
         Subsidiary, as the case may be, shall have notified, in a manner that
         effectively under applicable law creates a valid and first priority
         Lien in favor of Agent in such Inventory, such warehouseman, bailee,
         agent, processor or customer of Agent's Lien and (ii) such
         warehouseman, bailee, agent, processor or customer has subordinated any
         Lien it may claim therein and agreed to hold all such Inventory during
         the continuance of an Event of Default for Agent's account subject to
         the Agent's instructions, and (d) each of the representations and
         warranties set forth in the Security Documents executed by Borrower and
         its Subsidiaries with respect thereto is true and correct in all
         material respects on such date. In the event of any dispute under the
         foregoing criteria, about whether a portion of Inventory is or has
         ceased to be Eligible Inventory, the decision of Agent, made in good
         faith, shall be conclusive and binding, absent manifest error.

                  FREE CASH FLOW means, for any period for which the amount
         thereof is to be determined, the Consolidated Net Income of Borrower
         PLUS, to the extent deducted in calculating Consolidated Net Income,
         depreciation, amortization and accrued fees paid or payable to the
         Lenders under SECTION 3 of that certain Amendment to Loan Agreement
         dated as of March 21, 1999 executed by and between Borrower and the
         Lenders MINUS Capital Expenditures.

                  MAXIMUM REVOLVING LOAN AVAILABLE AMOUNT means, at any date, an
         amount equal to the least of (i) the aggregate of the Revolving Loan
         Commitments or (ii) the then effective Borrowing Base or (iii) for any
         period, the amount set forth in the table below opposite such

                                        3

         period (as such amounts set forth in the table below may be adjusted
         from time to time by the Majority Lenders):

                           PERIOD                            AMOUNT
                           ------                            ------

                  Through 3/20/99                            $73,800,000
                  3/21/99 through 4/20/99                    $76,500,000
                  4/21/99 through 5/20/99                    $77,000,000
                  5/21/99 through 6/20/99                    $76,000,000
                  6/21/99 through 7/20/99                    $75,500,000
                  7/21/99 through 8/20/99                    $73,500,000
                  8/21/99 through 9/20/99                    $73,500,000
                  9/21/99 through 10/20/99                   $75,000,000
                  10/21/99 through 11/20/99                  $76,300,000
                  11/21/99 through 12/20/99                  $74,000,000
                  12/21/99 through 1/20/2000                 $73,000,000
                  1/21/2000 through 2/20/2000                $71,000,000
                  2/21/2000 through 3/20/2000                $71,000,000
                  3/21/2000 through the Revolving Loan
                    Maturity Date                            $70,500,000

                  MINIMUM MONTHLY EBITDA means, for any applicable period, the
         sum of the amounts set forth opposite the applicable fiscal months
         included in such period on EXHIBIT K hereto.

                  MONTHLY FINANCIAL STATEMENTS means the monthly financial
         statements of a Person, which statements shall include a balance sheet
         as of the end of such fiscal month, an income statement for the period
         ended on such fiscal month and for the fiscal year to date and a
         statement of cash flows for the fiscal year to date, subject to normal
         year-end adjustments, prepared in accordance with GAAP in all material
         respects except that such statements are condensed and exclude detailed
         footnote disclosures and certified by the chief financial officer or
         other authorized officer of such Person as fairly presenting, in all
         material respects, the financial position of such person as of such
         date. Monthly Financial Statements shall set forth in comparative form
         the corresponding budgeted income statement amounts consolidated and by
         Subsidiary, and balance sheet and statement of cash flow amounts on a
         consolidated basis. To the extent required by Agent or the Majority
         Lenders, Monthly Financial Statements shall also include an unaudited
         consolidating balance sheet and income statement for the applicable
         Person, in Proper Form, certified by the chief financial officer or
         other authorized officer of such Person as true, correct and complete
         in all material respects.

                  OVER/UNDER ADVANCE AMOUNT means, for any period, the amount
         set forth in the table below opposite such period:


                                        4

                       PERIOD                          OVER/UNDER ADVANCE AMOUNT

                  Through 3/20/99                           $2,500,000
                  3/21/99 through 4/20/99                   $1,700,000
                  4/21/99 through 5/20/99                    ($700,000)
                  5/21/99 through 6/20/99                  ($3,000,000)
                  6/21/99 through 7/20/99                  ($2,900,000)
                  7/21/99 through 8/20/99                  ($2,000,000)
                  8/21/99 through 9/20/99                    ($400,000)
                  9/21/99 through 10/20/99                  $1,000,000
                  10/21/99 through 11/20/99                         $0
                  11/21/99 through 12/20/99                ($3,200,000)
                  12/21/99 through 1/20/2000               ($2,500,000)
                  1/21/2000 through 2/20/2000                ($900,000)
                  2/21/2000 through 3/20/2000                       $0
                  3/21/2000 through the Revolving Loan
                    Maturity Date                            ($200,000)

                  PRIMARY BORROWING BASE means, on any day, the aggregate of the
         amounts calculated on such day under CLAUSES (I) AND (II) of the
         definition of "Borrowing Base".

                  STATIONARY TERM LOAN BALANCE means (i) through July 30, 1999,
         $35,000,000, (ii) for the period from July 31, 1999 through January 30,
         2000, $34,000,000 and (iii) thereafter, $33,000,000, as such amount may
         be reduced in accordance with the provisions of SECTIONS 2.1, 2.3,
         3.2(B)(1) AND 8.5 hereof.

         (b) The definitions of "Base Rate", "Consolidated EBITDA", "Interest
Payment Dates", "Loan Documents", "Revolving Loan Commitment Percentage",
"Revolving Loan Maturity Date" and "Security Agreements" set forth in SECTION
1.1 of the Loan Agreement are hereby amended to read in their entireties as
follows:

                  BASE RATE means for any day a rate per annum equal to the
         lesser of (a) two percent (2%) per annum plus the Prime Rate for that
         day or (b) the Ceiling Rate.

                  CONSOLIDATED EBITDA means, without duplication, for any period
         the Consolidated Net Income of Borrower PLUS, to the extent deducted in
         calculating Consolidated Net Income, depreciation, amortization, other
         non-cash items, Interest Expense, fees payable under SECTION 3 of that
         certain Amendment to Loan Agreement dated as of March 21, 1999 executed
         by and among Borrower, Agent and certain Lenders, and provisions for
         income taxes.

                  INTEREST PAYMENT DATES means April 1, 1999 and the first day
         of each calendar month thereafter prior to the Maturity Date and the
         Revolving Loan Maturity Date.

                  LOAN DOCUMENTS means, collectively, this Agreement, the Notes,
         the Guaranties, all Applications, the Security Documents, the Notice of
         Entire Agreement, all instruments,

                                        5

         certificates and agreements now or hereafter executed or delivered by
         any Obligor to Agent or any Lender pursuant to any of the foregoing or
         in connection with the Obligations or any commitment regarding the
         Obligations, and all amendments, modifications, renewals, extensions,
         increases and rearrangements of, and substitutions for, any of the
         foregoing.

                  REVOLVING LOAN COMMITMENT means, as to any Lender, the
         obligation, if any, of such Lender to make Loans and incur or
         participate in Letter of Credit Liabilities in an aggregate principal
         amount at any one time outstanding up to (but not exceeding) the
         amount, if any, set forth opposite such Lender's name on the following
         table, or otherwise provided for in an Assignment and Acceptance
         Agreement (as the same may be reduced from time to time pursuant to
         SECTION 2.3 hereof):

                           LENDER                       REVOLVING COMMITMENT
                           ------                       --------------------

                  CHASE BANK OF TEXAS,  N. A.            $24,444,444.44

                  WELLS FARGO BANK (TEXAS),               $8,888,888.89
                  NATIONAL ASSOCIATION

                  BANK OF AMERICA TEXAS, N.A.            $15,555,555.56

                  COMERICA BANK-TEXAS                    $13,333,333.33

                  NATIONAL CITY BANK OF                  $17,777,777.78
                  KENTUCKY

                  REVOLVING LOAN COMMITMENT PERCENTAGE means, as to any
         Revolving Loan Lender, the percentage equivalent of a fraction the
         numerator of which is the amount of such Lender's Revolving Loan
         Commitment (or if the Revolving Loan Commitments have terminated, such
         Lender's outstanding Loans) and the denominator of which is the
         aggregate amount of the Revolving Loan Commitments of all Lenders (or
         if the Revolving Loan Commitments have terminated, the aggregate amount
         of all Loans).

                  REVOLVING LOAN MATURITY DATE means the maturity of the Notes,
April 20, 2000.

                  SECURITY AGREEMENTS means (i) security agreements, each in
         Proper Form, executed or to be executed in favor of Agent, securing the
         Obligations, covering all of the issued and outstanding equity
         interests in any Subsidiary of Borrower (other than non-voting
         preferred stock of Puget Investments, Inc. outstanding as of the
         Effective Date and other than Foreign Subsidiaries) and (ii) security
         instruments, each in Proper Form, executed in favor of Agent, securing
         the Obligations, covering all real and personal Property of Borrower
         and its Subsidiaries (other than Foreign Subsidiaries) and (iii)
         security agreements, each in Proper Form, executed or to be executed in
         favor of Agent, securing the Obligations, covering 65% of the issued
         and outstanding equity interests in any Foreign Subsidiary, as the same
         may from time to time be amended, modified, restated or supplemented.


                                        6

         (c) SECTION 2.1 of the Loan Agreement is hereby amended to read in its
entirety as follows:

                  2.1 LOANS. Each Lender severally agrees, subject to all of the
         terms and conditions of this Agreement (including, without limitation,
         SECTIONS 5.1 AND 5.2 hereof), to make Loans to Borrower, from time to
         time on or after the Effective Date and during the Revolving Loan
         Availability Period, in an aggregate principal amount at any one time
         outstanding (including its Revolving Loan Commitment Percentage of all
         Letter of Credit Liabilities at such time) up to but not exceeding such
         Lender's Revolving Loan Commitment Percentage of the Maximum Revolving
         Loan Available Amount. Subject to the conditions in this Agreement, any
         such Loan repaid prior to the Revolving Loan Termination Date may be
         reborrowed pursuant to the terms of this Agreement; PROVIDED, that any
         and all such Loans shall be due and payable in full at the end of the
         Revolving Loan Availability Period and PROVIDED, FURTHER that the
         Stationary Term Loan Balance shall automatically be reduced by any
         payments which reduce the aggregate unpaid principal balance of the
         Revolving Notes below the then current Stationary Term Loan Balance
         prior to giving effect to such reduction (with the result that the
         revolving nature of the credit facility provided for herein shall only
         apply to the Revolving Notes to the extent that the aggregate unpaid
         principal balance of the Revolving Notes exceeds the then current
         Stationary Term Loan Balance). Borrower, Agent and the Lenders agree
         pursuant to Chapter 346 ("CHAPTER 346") of the Texas Finance Code, that
         Chapter 346 (which relates to open-end line of credit revolving loan
         accounts) shall not apply to this Agreement, the Revolving Notes or any
         Revolving Loan Obligation and that neither the Revolving Notes nor any
         revolving Loan Obligation shall be governed by Chapter 346 or subject
         to its provisions in any manner whatsoever.

         (d) SECTION 2.2(A) of the Loan Agreement is hereby amended to read in
its entirety as follows:

                  (a) LETTERS OF CREDIT. Subject to the terms and conditions of
         this Agreement, and on the condition that aggregate Letter of Credit
         Liabilities shall never exceed $502,317 (less the face amount of any
         Letters of Credit issued and outstanding as of March 21, 1999 which are
         terminated or which expire after the date hereof), (i) Borrower shall
         have the right to, in addition to Loans provided for in SECTION 2.1
         hereof, utilize the Revolving Loan Commitments from time to time during
         the Revolving Loan Availability Period by obtaining the issuance of
         standby letters of credit for the account of Borrower if Borrower shall
         so request in the notice referred to in SECTION 2.2(B)(I) hereof (such
         standby letters of credit as any of them may be amended, supplemented,
         extended or confirmed from time to time, being herein collectively
         called the "LETTERS OF CREDIT)" and (ii) Chase Texas agrees to issue
         such Letters of Credit. Upon the date of the issuance of a Letter of
         Credit, the applicable Issuer shall be deemed, without further action
         by any party hereto, to have sold to each Revolving Loan Lender, and
         each such Lender shall be deemed, without further action by any party
         hereto, to have purchased from the applicable Issuer, a participation,
         to the extent of such Lender's Revolving Loan Commitment Percentage, in
         such Letter of Credit and the related Letter of Credit Liabilities,
         which participation shall terminate on the earlier of the expiration
         date of such Letter of Credit or the Revolving Loan Termination Date.
         No Letter of Credit shall have an expiration date later than one year
         from date of issuance. Any Letter of Credit

                                        7

         that shall have an expiration date after the end of the Revolving Loan
         Availability Period shall be subject to Cover or backed by a standby
         letter of credit in form and substance, and issued by a Person,
         acceptable to Agent in its sole discretion. Chase Texas or, with the
         prior approval of Borrower, Agent and the applicable Lender, another
         Lender shall be the Issuer of each Letter of Credit.

         (e) SECTION 2.2(B)(II) of the Loan Agreement is hereby amended to read
in its entirety as follows:

                           (ii) No Letter of Credit may be issued if after
                  giving effect thereto the sum of (A) the aggregate outstanding
                  principal amount of Loans plus (B) the aggregate Letter of
                  Credit Liabilities would exceed the aggregate of the Maximum
                  Revolving Loan Available Amount. On each day during the period
                  commencing with the issuance of any Letter of Credit and until
                  such Letter of Credit shall have expired or been terminated,
                  the Revolving Loan Commitment of each Revolving Loan Lender
                  shall be deemed to be utilized for all purposes hereof in an
                  amount equal to such Lender's Revolving Loan Commitment
                  Percentage of the amount then available for drawings under
                  such Letter of Credit (or any unreimbursed drawings under such
                  Letter of Credit).

         (f) SECTION 2.2(B)(IV) of the Loan Agreement is hereby amended to read
in its entirety as follows:

                           (iv) Borrower shall be irrevocably and
                  unconditionally obligated forthwith to reimburse Agent, on the
                  date on which the Agent notifies Borrower of the date and
                  amount of any payment by the Issuer of any drawing under a
                  Letter of Credit, for the amount paid by any Issuer upon such
                  drawing, without presentment, demand, protest or other
                  formalities of any kind, all of which are hereby waived. Such
                  reimbursement may, subject to satisfaction of the conditions
                  in SECTIONS 5.1 and 5.2 hereof and to the Maximum Revolving
                  Loan Available Amount (after adjustment in the same to reflect
                  the elimination of the corresponding Letter of Credit
                  Liability), be made by the borrowing of Loans. Agent will pay
                  to each Revolving Loan Lender such Lender's Revolving Loan
                  Commitment Percentage of all amounts received from Borrower
                  for application in payment, in whole or in part, of the
                  Reimbursement Obligation in respect of any Letter of Credit,
                  but only to the extent such Lender has made payment to Agent
                  in respect of such Letter of Credit pursuant to CLAUSE (III)
                  above.

         (g) SECTION 2.2(B)(V) of the Loan Agreement is hereby amended to read
in its entirety as follows:

                           (v) Borrower will pay to Agent at the Principal
                  Office for the account of each Revolving Loan Lender a letter
                  of credit fee with respect to each Letter of Credit equal to
                  the greater of (x) $500 or (y) 2.0% multiplied by the face
                  amount of such Letter of Credit (and computed on the basis of
                  the actual number of days elapsed in a year composed of 360
                  days), in each case for the period from and including the date
                  of issuance of such Letter of Credit to and including the date
                  of expiration or

                                        8

                  termination thereof, such fee to be due and payable in
                  advance. Agent will pay to each Revolving Loan Lender,
                  promptly after receiving any payment in respect of letter of
                  credit fees referred to in this CLAUSE (V), an amount equal to
                  the product of such Lender's Revolving Loan Commitment
                  Percentage TIMES the amount of such fees. In addition to and
                  cumulative of the above described fees, Borrower shall pay to
                  Agent, for the account of the applicable Issuer, in advance on
                  the date of the issuance of the applicable Letter of Credit, a
                  fronting fee in an amount equal to 1/8% of the face amount of
                  the applicable Letter of Credit (such fronting fee to be
                  retained by the applicable Issuer for its own account).

         (h) SECTION 2.3 of the Loan Agreement is hereby amended to read in its
entirety as follows:

                  2.3      TERMINATIONS OR REDUCTIONS OF  COMMITMENTS.

                  (a) MANDATORY. On the Revolving Loan Termination Date, all
         Revolving Loan Commitments shall be terminated in their entirety. The
         Revolving Loan Commitments are also subject to reduction as provided in
         SECTION 8.5 hereof.

                  (b) OPTIONAL. Borrower shall have the right to terminate or
         reduce the unused portion of the Revolving Loan Commitments at any time
         or from time to time, PROVIDED that Borrower shall give notice of each
         such termination or reduction to Agent as provided in SECTION 4.3
         hereof. Borrower may elect to apply all or any part of such voluntary
         reduction to the Stationary Term Loan Balance by so stating in its
         written notice of reduction.

                  (c) NO REINSTATEMENT. No termination or reduction of the
         Revolving Loan Commitments may be reinstated without the written
         approval of Agent and the Lenders.

         (i) SECTION 2.4 of the Loan Agreement is hereby amended to read in its
entirety as follows:

                  2.4      [INTENTIONALLY DELETED]

         (j) SECTION 2.5 of the Loan Agreement is hereby amended to read in its
entirety as follows:

                  2.5 SEVERAL OBLIGATIONS. The failure of any Lender to make any
         Loan to be made by it on the date specified therefor shall not relieve
         any other Lender of its obligation to make its Loan on such date, but
         neither Agent nor any Lender shall be responsible or liable for the
         failure of any other Lender to make a Loan to be made by such other
         Lender or to participate in, or co-issue, any Letter of Credit.
         Notwithstanding anything contained herein to the contrary, (a) no
         Lender shall be required to make or maintain Loans at any time
         outstanding if as a result the total Revolving Loan Obligations held by
         such Lender shall exceed the lesser of (1) such Lender's Revolving Loan
         Commitment Percentage of all Revolving Loan Obligations and (2) such
         Lender's Revolving Loan Commitment Percentage of the Maximum Revolving
         Loan Available Amount and (b) if a Revolving Loan Lender fails to

                                       9

         make a Loan as and when required hereunder, then upon each subsequent
         event which would otherwise result in funds being paid to the
         defaulting Lender, the amount which would have been paid to the
         defaulting Lender shall be divided among the non-defaulting Lenders
         ratably according to their respective shares of the outstanding
         Revolving Loan Commitment Percentages until the Revolving Loan
         Obligations of each Revolving Loan Lender (including the defaulting
         Lender) are equal to such Lender's Revolving Loan Commitment Percentage
         of the total Revolving Loan Obligations.

         (k) SECTION 2.7 of the Loan Agreement is hereby amended to read in its
entirety as follows:

                  2.7 USE OF PROCEEDS. The proceeds of the Loans shall be used
         to refinance existing Borrowed Money Indebtedness of Borrower, to pay
         Reimbursement Obligations and for other working capital and general
         corporate purposes. Neither Agent nor any Lender shall have any
         responsibility as to the use of any proceeds of the Loans.

         (l) SECTION 3.2 of the Loan Agreement is hereby amended to read in its
entirety as follows:

                  3.2      PREPAYMENTS.

                  (a) OPTIONAL PREPAYMENTS. Except as provided in SECTION 3.3
         hereof, Borrower shall have the right to prepay, on any Business Day,
         in whole or in part, without the payment of any penalty or fee, any
         Loans at any time or from time to time, PROVIDED that Borrower shall
         give Agent notice of each such prepayment as provided in SECTION 4.3
         hereof.

                  (b) MANDATORY PREPAYMENTS AND COVER. Except, in each case, as
         provided in SECTION 3.3 hereof,

                           (1)      INSURANCE PROCEEDS AND CONDEMNATION AWARDS.

                                    (i) Promptly following the receipt thereof
                           by Borrower or any of its Subsidiaries, subject to
                           the rights of any applicable lessor, Borrower shall
                           deposit or cause to be deposited with Agent in an
                           interest bearing account (but without any obligation
                           to maximize such interest) all of the net cash
                           proceeds of any payment or award in excess of $50,000
                           made to any such Person under any policy of Property
                           insurance with respect to any Property owned by such
                           Person or pursuant to any condemnation award with
                           respect to any such Property; provided such amounts
                           have not theretofore been reasonably expended for the
                           restoration or replacement of the asset in respect of
                           which such payment or award was made. Such amounts
                           shall be collaterally assigned to Agent as security
                           for the Obligations in a manner reasonably acceptable
                           to Agent. Upon delivery to Agent of written
                           certification by Borrower that the applicable Obligor
                           has reasonably expended amounts or committed in
                           writing to expend amounts for the restoration or
                           replacement of the asset in respect of which such
                           payment or

                                       10

                           award was made, specifying the amount expended or
                           committed, so long as no Default or Event of Default
                           shall have occurred and be continuing any such amount
                           deposited with Agent shall be released by Agent to
                           Borrower; PROVIDED, HOWEVER, that, in the event that
                           within 180 days of receipt of such payment or award
                           by Borrower, to the extent Borrower shall not have
                           actually spent or certified to Agent its intention to
                           expend a substantially equivalent amount for the
                           restoration or replacement of the asset in respect of
                           which such payment or award was made, Borrower shall
                           make a prepayment on the Loans (using any funds
                           deposited with Agent pursuant to this SECTION
                           3.2(B)(1) or other funds) in the amount of the excess
                           of the amount of such payment or award over the
                           amount of such expenditures and/or commitment on such
                           180th day. To the extent that such prepayment arises
                           out of an event occurring with respect to Property
                           which does not constitute "current assets", the
                           Stationary Term Loan Balance shall automatically be
                           reduced by the amount of such prepayment.

                                    (ii) In cases where the amount of the net
                           cash proceeds of any payment or award is equal to or
                           less than $50,000 and no Default or Event of Default
                           has occurred and is continuing, such proceeds may be
                           paid to any Obligor, and if received by Agent shall
                           be paid by Agent to Borrower, for use in paying for
                           replacements or repairs of or substitutes for the
                           damaged, destroyed or taken assets or in a manner
                           otherwise consistent with this Agreement.

                           (2)      BORROWING BASE.

                                    (i) Borrower shall from time to time on
                           demand by Agent prepay the Loans (or provide Cover
                           for Letter of Credit Liabilities) in such amounts as
                           shall be necessary so that at all times the aggregate
                           outstanding amount of all Revolving Loan Obligations
                           shall be less than or equal to the Maximum Revolving
                           Loan Available Amount.

                                    (ii) Borrower shall from time to time on
                           demand by Agent prepay the Loans (or provide Cover
                           for Letter of Credit Liabilities) in such amounts as
                           shall be necessary so that on each date set forth in
                           the table below the ratio of (x) the Primary
                           Borrowing Base shown on the most recent Borrowing
                           Base Certificate delivered pursuant to SECTION 7.2
                           hereof to (y) the unpaid principal balance of the
                           Obligations as of such date is equal to or greater
                           than the percentage specified opposite such date in
                           the table below:

                                       11

                    DATE                               MINIMUM PERCENTAGE
                    ----                               ------------------

                    3/31/99                                     50.00%
                    4/30/99                                     54.62%
                    5/31/99                                     57.18%
                    6/30/99                                     56.74%
                    7/31/99                                     56.29%
                    8/31/99                                     54.06%
                    9/30/99                                     53.44%
                    10/31/99                                    55.01%
                    11/30/99                                    57.85%
                    12/31/99                                    56.70%
                    1/31/2000                                   54.79%
                    2/29/2000                                   52.24%
                    3/31/2000                                   53.19%

                           (3) DISPOSITION OF ASSETS. Reference is hereby made
                  to SECTION 8.5 hereof which requires certain principal
                  payments in connection with certain dispositions of assets.

                  (c) INTEREST PAYMENTS. Accrued and unpaid interest on the
         unpaid principal balance of the Loans shall be due and payable on the
         Interest Payment Dates.

                  (d) PAYMENTS AND INTEREST ON REIMBURSEMENT OBLIGATIONS.
         Borrower will pay to Agent for the account of each Lender the amount of
         each Reimbursement Obligation on the date on which the Agent notifies
         Borrower of the date and amount of the applicable payment by the Issuer
         of any drawing under a Letter of Credit. The amount of any
         Reimbursement Obligation may, if the applicable conditions precedent
         specified in SECTIONS 5.1 and 5.2 hereof have been satisfied, be paid
         with the proceeds of Loans. Subject to SECTION 11.7 hereof, Borrower
         will pay to Agent for the account of each Lender interest on any
         Reimbursement Obligation (i) at the Base Rate from the date such
         Reimbursement Obligation arises until the date five (5) Business Days
         thereafter and (ii) at the Past Due Rate thereafter until the same is
         paid in full.

         (m) A new SECTION 6.18 is hereby added to the Loan Agreement, such new
Section to read in its entirety as follows:

                  6.18 COLLATERAL COVERED. As of the Effective Date, the
         Collateral covered by the Security Documents constitutes all real and
         personal Property owned by the Borrower and its Subsidiaries (other
         than (a) Foreign Subsidiaries, (b) 35% of the equity interests in and
         to Foreign Subsidiaries, (c) vehicles covered by certificates of title
         and (d) a tract of real property in Muskogee, Oklahoma which Plant
         Maintenance, Inc. is contractually obligated to convey to the former
         shareholders of Plant Maintenance, Inc.).

         (n) A new SECTION 6.19 is hereby added to the Loan Agreement, such new
Section reading in its entirety as follows:

                                       12

                  6.19 YEAR 2000. Any reprogramming required to permit the
         proper functioning, in and following the year 2000, of (i) the
         Borrower's and any of its Subsidiaries' computer systems and (ii)
         equipment containing embedded microchips (including systems and
         equipment supplied by others or with which the Borrower's and any of
         its Subsidiaries' systems interface) and the testing of all such
         systems and equipment will be completed by September 30, 1999. The cost
         to the Borrower and its Subsidiaries of such reprogramming and testing
         and of reasonably foreseeable consequences of year 2000 to the Borrower
         and its Subsidiaries (including, without limitation, reprogramming
         errors and failure of others' systems or equipment) will not result in
         an Event of Default or a Material Adverse Effect. Except for such of
         the reprogramming referred to in the preceding sentence as may be
         necessary, the computer and management systems of the Borrower and its
         Subsidiaries are and, with ordinary course upgrading and maintenance,
         will continue for the term of this Agreement to be, sufficient to
         permit the Borrower and its Subsidiaries to conduct their business
         without Material Adverse Effect.

         (o) SECTION 7.2 of the Loan Agreement is hereby amended to read in its
entirety as follows:

                  7.2 FINANCIAL STATEMENTS AND INFORMATION. Furnish to Agent
         (and, except where indicated, to each Lender) each of the following:

                  (a) as soon as available and in any event within 90 days after
         the end of each applicable fiscal year, beginning with the fiscal year
         ending on December 31, 1998, Annual Financial Statements of Borrower;

                  (b) as soon as available and in any event within 25 days after
         the end of each fiscal month, preliminary drafts of Monthly Financial
         Statements of Borrower and as soon as available and in any event within
         30 days after the end of each fiscal month, final Monthly Financial
         Statements of Borrower;

                  (c) as soon as available and in any event within 45 days after
         the end of each fiscal quarter, Quarterly Financial Statements of
         Borrower;

                  (d) concurrently with the financial statements provided for in
         SUBSECTIONS 7.2(A), (B) and (C) hereof, (x) such schedules,
         computations and other information, in reasonable detail, as may be
         required by Agent to demonstrate compliance with the covenants set
         forth herein or reflecting any non-compliance therewith as of the
         applicable date, all certified and signed by the president, chief
         financial officer or treasurer of Borrower (or other authorized officer
         approved by Agent) as true and correct in all material respects to the
         best knowledge of such officer and (y) a compliance certificate
         ("COMPLIANCE CERTIFICATE") in the form of EXHIBIT E hereto, duly
         executed by such authorized officer;

                  (e) promptly upon their becoming publicly available, each
         financial statement, report, notice or definitive proxy statements sent
         by any Obligor to shareholders generally and each regular or periodic
         report and each registration statement or prospectus filed by any

                                       13

         Obligor with any securities exchange or the Securities and Exchange
         Commission or any successor agency;

                  (f) within 20 calendar days after the end of each calendar
         month, a Borrowing Base Certificate as at the last day of such calendar
         month, together with such supporting information as Agent may
         reasonably request;

                  (g) within 20 days after the end of each calendar month (1) a
         listing and aging of the Accounts of Borrower and its Subsidiaries as
         of the end of the most recently ended calendar month, prepared in
         reasonable detail and containing such other information as Agent may
         reasonably request and (2) a summary of the Inventory of Borrower and
         its Subsidiaries as of the end of the most recently ended calendar
         month, prepared in reasonable detail and containing such other
         information as Agent may reasonably request (information under this
         clause to be delivered to Agent only);

                  (h) from time to time, at any time upon the request of Agent,
         but at the cost of Borrower, a report of an independent collateral
         field examiner approved by Agent in writing and reasonably acceptable
         to Borrower (which may be, or be affiliated with, Agent or one of the
         Banks) with respect to the Accounts and Inventory components included
         in the Borrowing Base;

                  (i) on Tuesday of each week, the gross Accounts of Borrower
         and its Subsidiaries and a true billings and collection report, all in
         Proper Form, as of the last Business Day of the preceding week
         (information under this clause to be delivered to Agent only);

                  (j) within 20 days after the end of each calendar month, to
         the extent available, a listing and aging of the accounts payable of
         Borrower and its Subsidiaries as of the end of the most recently ended
         calendar month, prepared in reasonable detail and containing such other
         information as Agent may reasonably request;

                  (k) within 20 days after the end of each calendar month, a
         summary of all capital expenditures of Borrower and its Subsidiaries
         during the preceding calendar month in excess of $5,000, prepared in
         reasonable detail and containing such other information as Agent may
         reasonably request;

                  (l) on every other Friday (or if the applicable Friday is not
         a Business Day, on the immediately following Business Day), a report to
         Agent and the Lenders, by telephone conference call, of the status of
         the strategic plan of the Borrower and its Subsidiaries, and any
         revisions to the projections of the operating results of Borrower and
         its Subsidiaries and any such other matters as Agent or the Majority
         Lenders may require;

                  (m) on the Wednesday preceding the telephone conference
         described the preceding clause (or if the applicable Wednesday is not a
         Business Day, on the immediately following Business Day), a report to
         Agent and the Lenders on the matters to be discussed during the
         following telephone conference, any other material developments with
         respect to

                                       14

         Borrower and its Subsidiaries and such other matters as Agent or the
         Majority Lenders may require;

                  (n) on the first day of each month, a calculation of the ratio
         described in SECTION 3.2(B)(2)(II) hereof as of the last day of the
         preceding month;

                  (o) within 30 days after request therefor from any Lender
         (which request may only be made during the continuation of an Event of
         Default), real estate evaluations and machinery and equipment
         appraisals representing 71% of total net book value of Borrower (on a
         consolidated basis) (machinery and equipment items with a net book
         value in excess of $250,000 are to be appraised on FSV basis and the
         remaining machinery and equipment items are to be valued on a desk top
         approach);

                  (p) on or before June 30, 1999, the Lenders shall coordinate
         among themselves, schedule with the Borrower, and perform a collateral
         audit (including detailed reports on billing procedures, collection
         procedures [including verifications] and inventory systems and costing)
         on the Borrower and its Subsidiaries, with the results of same to be
         distributed among the Lenders; all costs of the Lenders in connection
         with the audits and reports under this CLAUSE (P) are to be paid by the
         Borrower;

                  (q) on or before March 31, 1999, and every two weeks
         thereafter, the Borrower shall deliver a strategic plan substantially
         in the format heretofore delivered to the Lenders, in such detail as
         the Agent may reasonably request;

                  (r) by the end of each calendar month, an update on progress
         with respect to "Year 2000" issues, including projected completion
         dates by location, estimated related costs, verification of final
         testing and such other related matters as the Majority Lenders may
         require;

                  (s) on or before May 31, 1999, (1) an enterprise valuation of
         each Subsidiary of the Borrower; (2) a valuation of each business line
         of the Borrower, with the Subsidiaries of the Borrower to be grouped in
         accordance with such business lines, and (3) an enterprise valuation of
         the Borrower and its Subsidiaries taken as a whole; each such valuation
         shall be performed by a Person nominated by the Borrower and acceptable
         to the Majority Lenders; and

                  (t) such other financial projections and other information
         relating to the condition (financial or otherwise), operations or
         business of any Obligor as from time to time may be reasonably
         requested by Agent. Each delivery of a financial statement pursuant to
         this SECTION 7.2 shall constitute a restatement of the representations
         contained in the last two sentences of SECTION 6.2 with respect to the
         period of time from the date of such most recently delivered financial
         statements.

         (p) SECTION 7.3 of the Loan Agreement is hereby amended to read in its
entirety as follows:


                                       15

                  7.3 FINANCIAL TESTS. Borrower will have and maintain (in each
         case, on a consolidated basis for Borrower and its Subsidiaries):

                           (a) CONSOLIDATED EBITDA -- Consolidated EBITDA (i)
                  for the period from January 1, 1999 through June 30, 1999 of
                  at least $7,000,000, (ii) for the period from January 1, 1999
                  through December 31, 1999 of at least $14,000,000, (iii) for
                  each fiscal month of at least 70% of the Minimum Monthly
                  EBITDA for such fiscal month and (iv) beginning April 30,
                  1999, for each three-month period ending on the last day of a
                  fiscal month, of at least 85% of the Minimum Monthly EBITDA
                  for such period.

                           (b) FREE CASH FLOW -- Free Cash Flow (i) for any
                  fiscal quarter of at least $100,000 and (ii) for the period
                  from January 1, 1999 through December 31, 1999 of at least
                  $2,000,000; PROVIDED, HOWEVER, that in the event of a
                  divestiture of a Subsidiary of Borrower, the foregoing amounts
                  shall be reduced commensurate with such Subsidiary's pro rata
                  share of projected Consolidated EBITDA for the fiscal year
                  1999.

         The use of historical financial results for acquired Subsidiaries in
         connection with "pooling of interests" accounting shall not serve to
         cure any default under the covenants set forth in this Section that
         would otherwise arise.

         (q) SECTION 7.8 of the Loan Agreement is hereby amended to read in its
entirety as follows:

                  7.8 NOTICE OF CERTAIN MATTERS. Give Agent written notice of
         the following promptly (and in any event within five Business Days)
         after any executive officer of Borrower shall become aware of the same:

                  (a) the issuance by any court or governmental agency or
         authority of any injunction, order or other restraint prohibiting, or
         having the effect of prohibiting, the performance of this Agreement,
         any other Loan Document, or the making of the Loans or the initiation
         of any litigation, or any claim or controversy which would reasonably
         be expected to result in the initiation of any litigation, seeking any
         such injunction, order or other restraint;

                  (b) the filing or commencement of any action, suit or
         proceeding, whether at law or in equity or by or before any court or
         any Governmental Authority involving claims in excess of $1,000,000
         (exclusive of claims covered by insurance) or which may reasonably be
         expected to result in a Default hereunder;

                  (c) any Event of Default or Default, specifying the nature and
         extent thereof and the action (if any) which is proposed to be taken
         with respect thereto;

                  (d) the incurrence of material burdensome restrictions under
         contracts or applicable law which could reasonably be expected to have
         a Material Adverse Effect and

                                       16

         any other event (including strikes, labor disputes or loss of use of
         material patents or trademarks) which could reasonably be expected to
         have a Material Adverse Effect; and

         Borrower will also notify Agent in writing at least 30 days prior to
         the date that any Obligor changes its name or the location of its chief
         executive office or principal place of business or the place where it
         keeps its books and records. After the Effective Date, Borrower will
         notify Agent in writing at least 45 days prior to any Obligor's
         acquisition of any real or personal Property, wherever located, other
         than the Collateral covered by the Security Documents (such acquisition
         or ownership being herein called an "ADDITIONAL COLLATERAL EVENT" and
         the Property so acquired or owned being herein called "ADDITIONAL
         COLLATERAL").

         (r) New SECTIONS 7.11, 7.12 AND 7.13 are hereby added to the Loan
Agreement, such new Sections to read in their entireties as follows:

                  7.11 ADDITIONAL SECURITY DOCUMENTS. As soon as practicable and
         in any event within ten (10) Business Days after an Additional
         Collateral Event, Borrower shall (a) execute and deliver or cause to be
         executed and delivered applicable Security Documents, in Proper Form
         and in an amount reasonably satisfactory to the Majority Lenders, in
         favor of Agent and duly executed by the applicable Obligor, granting a
         first-priority Lien (subject only to Permitted Liens) upon the
         applicable Additional Collateral securing all of the Obligations, and
         such other documents (including, without limitation, all items required
         in connection with the applicable Security Documents previously
         executed hereunder, such as surveys, environmental assessments,
         certificates, legal opinions, all in Proper Form) as may be reasonably
         required by Agent or the Majority Lenders in connection with the
         execution and delivery of such Security Documents; (b) deliver or cause
         to be delivered such other documents or certificates consistent with
         the terms of this Agreement and relating to the transactions
         contemplated hereby as Agent or the Majority Lenders may reasonably
         request, and (c) pay in full all documentary stamps, filing and
         recording fees, taxes and other fees and charges payable in connection
         with the filing and recording of any Security Document.

                  7.12 DOMINION OF FUNDS PROCEDURES. All revenues and receipts
         received by Borrower or any of its Subsidiaries will be immediately
         deposited into an account or accounts (collectively, the "LOCKBOX
         ACCOUNTS") in the name of Borrower or one or more of its Subsidiaries
         maintained with Agent. No disbursements or withdrawals may be made from
         any of the Lockbox Accounts by Borrower or any of its Subsidiaries
         without the prior written approval of Agent, in its sole and absolute
         discretion. On a daily basis, sums shall be withdrawn from the Lockbox
         Accounts by Agent and applied as a prepayment on the unpaid principal
         balance of the Loans outstanding on such date.

                  7.13 TURNAROUND CONSULTANT. Borrower shall at all times retain
         a turnaround consultant satisfactory to the Majority Lenders, under an
         acceptable scope of work. The Agent and the Lenders will be provided
         access to all consultant generated information and reports and the
         applicable consultant shall report on a semi-monthly basis to Borrower,
         with a copy to the Agent and each Lender.


                                       17

         (s) SECTION 8.1 of the Loan Agreement is hereby amended to read in its
entirety as follows:

                  8.1 BORROWED MONEY INDEBTEDNESS. Create, incur, suffer or
         permit to exist, or assume or guarantee, directly or indirectly, or
         become or remain liable with respect to any Borrowed Money
         Indebtedness, whether direct, indirect, absolute, contingent or
         otherwise, except the following:

                  (i)      Indebtedness under this Agreement and the other Loan
                           Documents and Indebtedness secured by Liens permitted
                           by SECTION 8.2 hereof;

                  (ii)     the liabilities existing on the date of this
                           Agreement and disclosed in the financial statements
                           delivered on or prior to March 1, 1999 pursuant to
                           SECTIONS 6.2 OR 7.2 hereof and set forth on EXHIBIT G
                           hereto, and all renewals, extensions and replacements
                           (but not increases) of any of the foregoing;

                  (iii)    the Interest Rate Risk Indebtedness;

                  (iv)     current liabilities incurred in the ordinary course
                           of business.

         (t) SECTION 8.2 of the Loan Agreement is hereby amended to read in its
entirety as follows:

                  8.2 LIENS. Create or suffer to exist any Lien upon any of its
         Property now owned or hereafter acquired, or acquire any Property upon
         any conditional sale or other title retention device or arrangement or
         any purchase money security agreement; or in any manner directly or
         indirectly sell, assign, pledge or otherwise transfer any of its
         Accounts or General Intangibles; PROVIDED, HOWEVER, that any Obligor
         may create or suffer to exist the following:

         (i)      artisans' or mechanics' Liens arising in the ordinary course
                  of business, and Liens for taxes, but only to the extent that
                  payment thereof shall not at the time be due or if due, the
                  payment thereof is being diligently contested in good faith
                  and adequate reserves computed in accordance with GAAP have
                  been set aside therefor;

         (ii)     normal encumbrances and restrictions on title which do not
                  secure Borrowed Money Indebtedness and which do not have a
                  Material Adverse Effect;

         (iii)    Liens in favor of Agent or any Lender under the Loan
                  Documents, including, without limitation, Liens securing
                  Interest Rate Risk Indebtedness owed to one or more of the
                  Lenders (but not to any Person which is not, at the time the
                  Interest Rate Risk Indebtedness is incurred, a Lender);

         (iv)     Liens incurred or deposits made in the ordinary course of
                  business (1) in connection with workmen's compensation,
                  unemployment insurance, social security and other like laws,
                  or (2) to secure insurance in the ordinary course of business,
                  the performance of bids, tenders, contracts, leases, licenses,
                  statutory obligations, surety,

                                       18

                  appeal and performance bonds and other similar obligations
                  incurred in the ordinary course of business, not, in any of
                  the cases specified in this clause (2), incurred in connection
                  with the borrowing of money, the obtaining of advances or the
                  payment of the deferred purchase price of Property;

         (v)      attachments, judgments and other similar Liens arising in
                  connection with court proceedings, PROVIDED that the execution
                  and enforcement of such Liens are effectively stayed and the
                  claims secured thereby are being actively contested in good
                  faith with adequate reserves made therefor in accordance with
                  GAAP;

         (vi)     Liens imposed by law, such as carriers', warehousemen's,
                  mechanics', materialmen's and vendors' liens, incurred in good
                  faith in the ordinary course of business and securing
                  obligations which are not yet due or which are being contested
                  in good faith by appropriate proceedings if adequate reserves
                  with respect thereto are maintained in accordance with GAAP;

         (vii)    zoning restrictions, easements, licenses, reservations,
                  provisions, covenants, conditions, waivers, and restrictions
                  on the use of Property, and which do not in any case singly or
                  in the aggregate materially impair the present use or value of
                  the Property subject to any such restriction or materially
                  interfere with the ordinary conduct of the business of any
                  Obligor or any Subsidiary of Borrower to the extent that it
                  would cause a Material Adverse Effect;

         (viii)   capital leases permitted under the other provisions of this
                  Agreement;

         (ix)     existing Liens as of Effective Date as set forth on EXHIBIT H
                  hereto; and

         (x)      extensions, renewals and replacements of Liens referred to in
                  CLAUSES (I) through (IX) above; PROVIDED that any such
                  extension, renewal or replacement Lien shall be limited to the
                  Property or assets covered by the Lien extended, renewed or
                  replaced and that the Borrowed Money Indebtedness secured by
                  any such extension, renewal or replacement Lien shall be in an
                  amount not greater than the amount of the Indebtedness secured
                  by the Lien extended, renewed or replaced.

         (u) SECTION 8.3 of the Loan Agreement is hereby amended to read in its
entirety as follows:

                  8.3 CONTINGENT LIABILITIES. Except for indemnification and
         contribution arrangements with customers, sellers of businesses and
         officers and directors of Borrower and its Subsidiaries in the ordinary
         course of business, directly or indirectly guarantee the performance or
         payment of, or purchase or agree to purchase, or assume or contingently
         agree to become or be secondarily liable in respect of, any obligation
         or liability of any other Person (other than Subsidiaries) except for
         (a) the endorsement of checks or other negotiable instruments in the
         ordinary course of business; (b) obligations disclosed to Agent in the
         financial statements delivered on or prior to March 1, 1999 pursuant to
         SECTIONS 6.2 OR 7.2 hereof (but not increases of such obligations after
         the Effective Date), including stock price

                                       19

         guaranties described in such financial statements and (c) those
         liabilities permitted under SECTION 8.1 hereof.

         (v) SECTION 8.5 of the Loan Agreement is hereby amended to read in its
entirety as follows:

                  8.5 DISPOSITION OF ASSETS. Sell, convey or lease all or any
         part of its assets, except for (x) sales of Inventory in the ordinary
         course of business and (y) sales of other Property in the ordinary
         course of business so long as the net proceeds realized from such sales
         are used to prepay the Loans; PROVIDED that the Stationary Term Loan
         Balance shall automatically be reduced by the net proceeds realized
         from any such sales which consist of Property of Borrower or any of its
         Subsidiaries other than items included in the Primary Borrowing Base.
         For purposes of this Agreement, no sale/leaseback transaction or sale
         of any equity interests will be deemed to be in the ordinary course of
         business.

         (w) SECTION 8.12 of the Loan Agreement is hereby amended to read in its
entirety as follows:

                  8.12 CAPITAL EXPENDITURES. Permit Capital Expenditures of
         Borrower and its Subsidiaries to exceed $625,000 in the aggregate for
         any calendar quarter.

         (x) SECTION 8.13 of the Loan Agreement is hereby amended to read in its
entirety as follows:

                  8.13 ACQUISITIONS. Acquire any real Property or any material
         personal Property (including any acquisition of equity interests in
         another Person) after the Effective Date, except for acquisitions of
         Property reasonably necessary to the continued operations of Borrower
         or its Subsidiaries in the ordinary course of business.

         (y) SECTION 8.15 of the Loan Agreement is hereby amended to read in its
entirety as follows:

                  8.15 SUBSIDIARIES. Form, create or acquire any Subsidiary,
         except that Borrower (or any of its Subsidiaries) may form or create a
         wholly-owned Subsidiary so long as (a) immediately thereafter and
         giving effect thereto, no event will occur and be continuing which
         constitutes a Default; (i) such Subsidiary shall execute and deliver to
         Agent a Guaranty in substantially the same form as the Guaranties
         executed prior to the date hereof; (ii) the applicable owner(s) of the
         equity interests in such Subsidiary shall execute and deliver to Agent
         such Security Documents as Agent may reasonably require in order to
         create a valid, perfected, first priority Lien upon all of the issued
         and outstanding equity interests in such Subsidiary, (iii) the new
         Subsidiary shall execute and deliver to Agent such Security Documents
         as Agent may reasonably require in order to create a valid, perfected,
         first priority Lien (subject only to Permitted Liens) upon all of the
         real and personal Property of such new Subsidiary and (iv) such new
         Subsidiary is not a Foreign Subsidiary and (b) Agent is given at least
         15 days' prior written notice of such formation or creation.


                                       20

         (z) SECTION 9.1(D) of the Loan Agreement is hereby amended to read in
its entirety as follows:

                           (d) AFFIRMATIVE COVENANTS - (i) default shall be made
                  in the due observance or performance of any of the covenants
                  or agreements contained in SECTIONS 7.3 or 7.8(C) hereof, (ii)
                  default is made in the due observance or performance of any of
                  the covenants or agreements contained in SECTION 7.2(F) hereof
                  and such default continues unremedied for a period of one day,
                  (iii) default is made in the due observance or performance of
                  any of the other covenants or agreements contained in SECTION
                  7.2 hereof and such default continues unremedied for a period
                  of five days, or (iv) default is made in the due observance or
                  performance of any of the other covenants and agreements
                  contained in SECTION 7 hereof or any other affirmative
                  covenant of any Obligor contained in this Agreement or any
                  other Loan Document and such default continues unremedied for
                  a period of 30 days after (x) notice thereof is given by the
                  Agent to the Borrower or (y) such default otherwise becomes
                  known to any executive officer of the Borrower, whichever is
                  earlier; or

         (aa) SECTION 9.1(J) of the Loan Agreement is hereby amended to read in
its entirety as follows:

                           (j) SECURITY DOCUMENTS - any Security Document for
                  any reason ceases to create a valid and perfected Lien of the
                  first priority (subject to the Permitted Liens), required
                  thereby on any of the Collateral purported to be covered
                  thereby and securing that portion of the Obligations which is
                  therein designated as being secured, or any Obligor (or any
                  other Person who may have granted or purported to grant such
                  Lien) will so state in writing or the Security Documents shall
                  cease to evidence first-priority Liens upon all of the real
                  and personal Property of each Obligor other than 35% of the
                  equity interests in and to Foreign Subsidiaries and as
                  otherwise set forth in SECTION 6.18 hereof (except for the ten
                  (10) Business Day period provided for in SECTION 7.11 hereof)
                  ; or

         (bb) EXHIBIT A to the Loan Agreement (Request for Advance) is hereby
amended to read in its entirety as set forth on EXHIBIT A hereto.

         (cc) EXHIBIT E to the Loan Agreement (Compliance Certificate) is hereby
amended to read in its entirety as set forth on EXHIBIT E hereto.

         (dd) A new EXHIBIT J (Borrowing Base Certificate) is hereby added to
the Loan Agreement, such new Exhibit to read in its entirety as set forth on
EXHIBIT J hereto.

         (ee) A new EXHIBIT K (Minimum Monthly EBITDA) is hereby added to the
Loan Agreement, such new Exhibit to read in its entirety as set forth on EXHIBIT
K hereto.

         SECTION 2. NO LIBOR OPTION. Borrower acknowledges and agrees that,
notwithstanding anything to the contrary set forth in the Loan Agreement, the
option to have any part of the Obligations bear interest at an interest rate
based upon a Eurodollar Rate has been terminated.

                                       21

         SECTION 3. CERTAIN FEES. In consideration of the execution and delivery
of this Amendment, but subject to the provisions of SECTION 11.7 of the Loan
Agreement, Borrower shall pay to the Lenders which have elected to execute this
Amendment as of March 21, 1999 (collectively, the "APPROVING LENDERS") a fee
which shall accrue quarterly, on March 31, 1999, June 30, 1999, September 30,
1999 and December 31, 1999, in an amount equal to (for each such quarterly
accrual date) one and one-half percent (1-1/2%) TIMES the unpaid principal
balance of the Obligations as of the applicable accrual date. Such fee shall be
paid to Agent for pro rata distribution to the Approving Lenders (i) in an
installment of $1,000,000 to be due and payable on July 31, 1999, (ii) in an
installment of $500,000 to be due and payable on August 31, 1999, (iii) in an
installment of $500,000 to be due and payable on November 30, 1999 and (iv) on
the Revolving Loan Maturity Date, when the balance of such fee shall be due and
payable; PROVIDED that if on June 1, 1999 (x) the Stationary Term Loan Balance
is reduced to zero; (y) the Revolving Loan Obligations are no greater than the
Primary Borrowing Base (as reflected in the most recent Borrowing Base
Certificate delivered to the Agent) and (z) no Event of Default shall have
occurred which is continuing, the aggregate fees payable under this Section
shall be reduced to $100,000 which shall be due and payable on July 1, 1999 and
PROVIDED FURTHER that if the Obligations are paid in full (and the Revolving
Loan Commitments terminated in their entirety) by June 30, 1999, no fees shall
be payable under this Section.

         SECTION 4. RATIFICATION. Except as expressly amended by this Amendment,
the Loan Agreement and the other Loan Documents shall remain in full force and
effect. None of the rights, title and interests existing and to exist under the
Loan Agreement are hereby released, diminished or impaired, and the Borrower
hereby reaffirms all covenants, representations and warranties in the Loan
Agreement.

         SECTION 5. EXPENSES. The Borrower shall pay to the Agent all reasonable
fees and expenses of Agent's legal counsel (pursuant to Section 11.3 of the Loan
Agreement) incurred in connection with the execution of this Amendment.

         SECTION 6. CERTIFICATIONS. The Borrower hereby certifies that (a) no
material adverse change in the assets, liabilities, financial condition,
business or affairs of the Borrower has occurred since December 31, 1998 and (b)
except as previously disclosed to Agent and the Lenders in writing, no Default
or Event of Default has occurred and is continuing or will occur as a result of
this Amendment.

         SECTION 7. EFFECTIVENESS. The effectiveness of this Amendment is
contingent upon (a) execution and delivery to each of the Approving Lenders of
certain warrants and registration rights agreements.

         SECTION 8. OVERDRAFTS. Concurrently with the effectiveness of this
Agreement, the Obligors will eliminate the overdrafts in their accounts with
Chase Texas.

         SECTION 9. MISCELLANEOUS. This Amendment (a) shall be binding upon and
inure to the benefit of the Borrower, the Lenders and the Agent and their
respective successors, assigns, receivers and trustees; (b) may be modified or
amended only by a writing signed by the required parties; (c) shall be governed
by and construed in accordance with the laws of the State of Texas and the
United

                                       22

States of America; (d) may be executed in several counterparts by the parties
hereto on separate counterparts, and each counterpart, when so executed and
delivered, shall constitute an original agreement, and all such separate
counterparts shall constitute but one and the same agreement and (e) together
with the other Loan Documents, embodies the entire agreement and understanding
between the parties with respect to the subject matter hereof and supersedes all
prior agreements, consents and understandings relating to such subject matter.
The headings herein shall be accorded no significance in interpreting this
Amendment.



               NOTICE PURSUANT TO TEX. BUS. & COMM. CODE SS.26.02

         THE LOAN AGREEMENT, AS AMENDED BY THIS AMENDMENT, AND ALL OTHER LOAN
DOCUMENTS EXECUTED BY ANY OF THE PARTIES PRIOR HERETO OR SUBSTANTIALLY
CONCURRENTLY HEREWITH CONSTITUTE A WRITTEN LOAN AGREEMENT WHICH REPRESENTS THE
FINAL AGREEMENT BETWEEN THE PARTIES AND MAY NOT BE CONTRADICTED BY EVIDENCE OF
PRIOR, CONTEMPORANEOUS OR SUBSEQUENT ORAL AGREEMENTS OF THE PARTIES. THERE ARE
NO UNWRITTEN ORAL AGREEMENTS BETWEEN THE PARTIES.



                  [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]



                                       23

         IN WITNESS WHEREOF, the Borrower, the Lenders and the Agent have caused
this Amendment to be signed by their respective duly authorized officers,
effective as of the date first above written.

                                            INNOVATIVE VALVE TECHNOLOGIES, INC.,
                                            a Delaware corporation


                                            By:_________________________________
                                                  Douglas R. Harrington, Jr.,
                                                  Vice President




                                       24

                                            CHASE BANK OF TEXAS,  N. A.,
                                            as Agent and as a Lender


                                            By:_________________________________
                                            Name:_______________________________
                                            Title:______________________________





                                       25

                                            WELLS FARGO BANK (TEXAS), NATIONAL
                                            ASSOCIATION


                                            By:_________________________________
                                            Name:_______________________________
                                            Title:______________________________






                                       26

                                            BANK OF AMERICA TEXAS, N.A.

 
                                            By:_________________________________
                                            Name:_______________________________
                                            Title:______________________________





                                       27

                                            COMERICA BANK-TEXAS


                                            By:_________________________________
                                            Name:_______________________________
                                            Title:______________________________






                                       28

                                            NATIONAL CITY BANK OF KENTUCKY


                                            By:_________________________________
                                            Name:_______________________________
                                            Title:______________________________








                                       29

         The undersigned hereby join in this Amendment to evidence their consent
to execution by Borrower of this Amendment, to confirm that each Loan Document
now or previously executed by the undersigned applies and shall continue to
apply to the Loan Agreement, as amended hereby, to acknowledge that without such
consent and confirmation, Lender would not execute this Amendment and to join in
the notice pursuant to Tex. Bus. & Comm. Code ss.26.02 set forth above.

                                             EACH OF THE SUBSIDIARIES OF
                                             INNOVATIVE VALVE TECHNOLOGIES, INC.



                                             By:________________________________
                                                  Douglas R. Harrington, Jr.,
                                                  Vice President




                                       30

                                           [LETTERHEAD OF THE BORROWER]


                         REQUEST FOR EXTENSION OF CREDIT


                                             ________________, 199____


Chase Bank of Texas, National
  Association, as Agent
712 Main Street
Houston, Texas  77002
Attention:  Manager, Diversified Corporate Group


Gentlemen:

         The undersigned hereby certifies that he is the
_________________________________ of INNOVATIVE VALVE TECHNOLOGIES, INC., a
Delaware corporation (the "COMPANY"), and that as such he is authorized to
execute this Request for Extension of Credit (the "REQUEST") on behalf of the
Company pursuant to the Loan Agreement (as it may be amended, supplemented or
restated from time to time, the "AGREEMENT") dated as of July 7, 1998, by and
among the Company, Chase Bank of Texas, National Association, as Agent and the
Lenders therein named. The (check one) [ ] Loan [ ] Letter of Credit being
requested hereby is to be in the amount set forth in (b) below and is requested
to be made on __________________, which is a Business Day. The undersigned
further certifies, represents and warrants that to his knowledge, after due
inquiry (each capitalized term used herein having the same meaning given to it
in the Agreement unless otherwise specified herein):

 (a)      As of the date hereof:

          (1)      The Borrowing Base is:                           $
                                                                     ===========
          (2)      The aggregate Revolving Loan Commitments are:    $
                                                                     ===========
          (3)      The Maximum Revolving Loan Available Amount
                   (Lesser of (a)(1) and (a)(2)) is:                $___________

          (4)      The aggregate outstanding principal of the Revolving
                   Loan Obligations, before giving
                   effect to the Loan, if any, requested hereby, is: (_________)

          (5)      The amount of Letter of Credit Liabilities as of

                                    EXHIBIT A

                   the date hereof, before giving effect to the Letter of
                   Credit, if any, requested hereby, is:             (_________)

          (6)      The aggregate unused Revolving Loan Commitments of
                   all Lenders [(a)(3) minus sum of
                   (a)(4) and (a)(5)], if positive, is:              $
                                                                     ===========

         (b)      If and only if the aggregate unused Revolving Loan Commitments
                  of all Lenders [(a)(6)] is positive, the Company hereby
                  requests under this Request a Loan or Letter of Credit (as
                  indicated above) in the amount of $____________ (which is no
                  more than the aggregate unused Revolving Loan Commitments of
                  all Lenders).

         (c)      If a Letter of Credit is requested hereby, it should be issued
                  for the benefit of ___________________________________ and
                  should have an expiration date of ____________________ (which
                  date is no later than one year from the proposed date of
                  issuance) and any special language to be incorporated into
                  such Letter of Credit is attached hereto. The sum of the face
                  amount of the requested Letter of Credit PLUS the Letter of
                  Credit Liabilities as the date hereof as specified in item
                  (a)(5) above does not exceed $______________.

         (d)      The representations and warranties made in each Loan Document
                  are true and correct in all material respects on and as of the
                  time of delivery hereof, with the same force and effect as if
                  made on and as of the time of delivery hereof.

         (e)      No change in the assets, liabilities, financial condition,
                  business or affairs of the Company or any of the other
                  Obligors has occurred which results in a Material Adverse
                  Effect.

         (f)      No Default or Event of Default has occurred and is continuing.

         Thank you for your attention to this matter.

                                               Very truly yours,


                                               _________________________________
                                               [SIGNATURE OF AUTHORIZED OFFICER]

                                    EXHIBIT A


                                        2

                             COMPLIANCE CERTIFICATE


         The undersigned hereby certifies that he is the
______________________________ of INNOVATIVE VALVE TECHNOLOGIES, INC., a
Delaware corporation (the "BORROWER"), and that as such he is authorized to
execute this certificate on behalf of the Borrower pursuant to the Loan
Agreement (as amended, the "AGREEMENT") dated as of July 7, 1998, by and among
the Borrower, CHASE BANK OF TEXAS, NATIONAL ASSOCIATION, as Agent, and the
lenders therein named; and that a review of the Borrower and the other Obligors
has been made under his supervision with a view to determining whether the
Borrower and the other Obligors have fulfilled all of their respective
obligations under the Agreement, the Notes and the other Loan Documents; and on
behalf of the Borrower further certifies, represents and warrants that to his
knowledge, after due inquiry (each capitalized term used herein having the same
meaning given to it in the Agreement unless otherwise specified):

                   (a) The Borrower and the other Obligors have fulfilled, in
         all material respects, their respective obligations under the
         Agreement, the Notes and the other Loan Documents.

                   (b) The representations and warranties made in each Loan
         Document are true and correct in all material respects on and as of the
         time of delivery hereof, with the same force and effect as if made on
         and as of the time of delivery hereof.

                   (c) The financial statements delivered to the Agent
         concurrently with this Compliance Certificate have been prepared in
         accordance with GAAP consistently followed throughout the period
         indicated and fairly present the financial condition and results of
         operations of the applicable Persons as at the end of, and for, the
         period indicated (subject, in the case of Monthly Financial Statements,
         to normal changes resulting from year-end adjustments).

                   (d) No Default or Event of Default has occurred and is
         continuing. In this regard, the compliance with the provisions of
         SECTIONS 7.3 and 8.12 is as follows:

                           (i)      SECTION 7.3(A) -- CONSOLIDATED EBITDA

                                    [PROVIDE DETAIL FOR APPLICABLE PERIODS
                                    REPORTED, ACTUAL CONSOLIDATED EBITDA AND
                                    REQUIRED CONSOLIDATED EBITDA]

                           (ii)     SECTION 7.3(B) -- FREE CASH FLOW

                                    [PROVIDE DETAIL FOR APPLICABLE PERIODS
                                    REPORTED, ACTUAL FREE CASH FLOW AND REQUIRED
                                    FREE CASH FLOW]


                                    EXHIBIT E


                           (iii)    SECTION 8.12 -- CAPITAL EXPENDITURES

                                    ACTUAL                       MAXIMUM

                                    $------------                $------------


                   (e) No material adverse change in the assets, liabilities,
         financial condition, business or affairs of the Borrower or any of the
         other Obligors has occurred since the Effective Date.

                   DATED as of ____________________.



                                               _________________________________
                                               [SIGNATURE OF AUTHORIZED OFFICER]




                                    EXHIBIT E

                                       2

                           BORROWING BASE CERTIFICATE


         The undersigned hereby certifies that he is the
__________________________________ of INNOVATIVE VALVE TECHNOLOGIES, INC., a
Delaware corporation (the "BORROWER"), and that as such he is authorized to
execute this Borrowing Base Certificate on behalf of the Borrower pursuant to
the Loan Agreement (as it may be amended, supplemented or restated from time to
time, the "AGREEMENT") dated as of July 7, 1998, by and among the Borrower,
Chase Bank of Texas, National Association, as Agent, and the Lenders therein
named. The undersigned further certifies, represents and warrants that to his
knowledge, after due inquiry, that SCHEDULE 1 attached hereto has been duly
completed and is true and correct in all material respects.

         Dated ________________, 199____.





                                               _________________________________
                                               [SIGNATURE OF AUTHORIZED OFFICER]





                                    EXHIBIT J

                                            Borrowing Base Certificate
                                            Dated ________________


                                    
Gross Accounts Receivable                   ______________
Plus:
         Costs in excess of billings (WIP)  ______________ 
Less:
         Over 90 days Old                   (_____________)
         Foreign                            (_____________)

Total Eligible A/R                          ______________
Advance Rate                                           80%
A/R Borrowing Amount                                          _____________


Gross Inventory                             ______________
Less:
         Foreign                            (______________)
         Costs in excess of Billings (WIP)  (______________)

Total Eligible Inventory                    _______________
Advance Rate                                          50%
Inventory Borrowing Amount                                    ______________

Add or Subtract: Allowed Over/(under) Advance                 ______________

Add: Allowed Stationary Balance                               ______________

Total Borrowing Base                                                                     ______________
Total Outstanding including L/C's                                                        (____________)
Availability/(required paydown)                                                          ______________



                                   SCHEDULE 1



               BORROWING BASE                     COLLATERAL COVERAGE           MAXIMUM PERMITTED OUTSTANDINGS

               ALLOWED OVER OR       ALLOWED      REQUIRED OUTSTANDING                                           MAXIMUM
BORROWING      (UNDER) ADVANCE    STATIONARY       LOANS TO BB COVERAGE                                         OBLIGATION
BASE DATE            AMOUNTS          BALANCE     % AND "AS OF" DATE            PERIOD                           AMOUNT
- - ---------      ---------------     -----------    -----------------------       ------                           ------
                                  
2/28/99              $1.7MM        $35,000,000
3/31/99             ($.7MM)        $35,000,000    50.00%   on 3/31/99       3/21/99 - 4/20/99                  $76,500,000
4/30/99             ($3MM)         $35,000,000    54.62%   on 4/30/99       4/21/99 - 5/20/99                  $77,000,000
5/31/99             ($2.9MM)       $35,000,000    57.18%   on 5/31/99       5/21/99 - 6/20/99                  $76,000,000
6/30/99             ($2MM)         $35,000,000    56.74%   on 6/30/99       6/21/99 - 7/20/99                  $75,500,000
7/31/99             ($.4MM)        $34,000,000    56.29%   on 7/31/99       7/21/99 - 8/20/99                  $73,500,000
8/31/99             $1.0MM         $34,000,000    54.06%   on 8/31/99       8/21/99 - 9/20/99                  $73,500,000
9/30/99             $0MM           $34,000,000    53.44%   on 9/30/99       9/21/99 - 10/20/99                 $75,000,000
10/31/99            ($3.2MM)       $34,000,000    55.01%   on 10/31/99      10/21/99 - 11/20/99                $76,300,000
11/30/99            ($2.5MM)       $34,000,000    57.85%   on 11/30/99      11/21/99 - 12/20/99                $74,000,000
12/31/99            ($.9MM)        $34,000,000    56.70%   on 12/31/99      12/21/99 - 1/20/00                 $73,000,000
1/31/00             $0MM           $33,000,000    54.79%   on 1/31/00       1/21/00 - 2/20/00                  $71,000,000
2/29/00             ($.2MM)        $33,000,000    52.24%   on 2/29/00       2/21/00 - 3/20/00                  $71,000,000
3/31/00             $0MM           $33,000,000    53.19%   on 3/31/00       3/21/00 - 4/20/00                  $70,500,000


* Calculated by using the current borrowing base as a percent of the total
outstanding credit facility at the end of the indicated month, (e.g., the March
31, 1999 number of 51.37% is calculated using the 2/28 borrowing base of $38,380
divided by the total outstandings including L/C's under the credit facility of
$74,706.)


                                   SCHEDULE 1

                                        2

                             MINIMUM MONTHLY EBITDA


               CALENDAR MONTH                            MINIMUM MONTHLY EBITDA
               --------------                            ----------------------

                February, 1999                                    $112,560
                March 1999                                       $2,318,239
                April 1999                                       $1,799,048
                May 1999                                         $1,799,048
                June 1999                                        $1,059,942
                July 1999                                         $825,955
                August 1999                                      $825,955
                September 1999                                   $1,348,400
                October 1999                                     $1,299,813
                November 1999                                    $1,299,813
                December 1999                                     $629,991
                January 2000                                     $255,343
                February 2000                                     $775,943
                March 2000                                       $1,817,131
                April 2000                                       $1,799,048





                                    EXHIBIT K