1
                                                                    EXHIBIT 3.1


                         CERTIFICATE OF INCORPORATION
                                       OF
                                 AQUA-CHEM, INC.

                      (incorporating amendments effected
                        by Certificate of Merger filed
                      August 1, 1997, and Certificate of
                        Amendment filed June 23, 1998)

         ARTICLE ONE.  The name of the corporation is Aqua-Chem, Inc.

         ARTICLE TWO. The address of its registered office in the State of
Delaware is Corporation Trust Center, 1209 Orange Street, in the City of
Wilmington, County of New Castle. The name of its registered agent at such
address is The Corporation Trust Company.

         ARTICLE THREE. The purpose of the corporation (the "Company") is to
engage in any lawful act or activity for which corporations may be organized
under the Delaware General Corporation Law.

         ARTICLE FOUR. The total number of shares of stock which the Company
shall have authority to issue is Two Million Six Thousand Two Hundred Sixty
(2,006,260), divided into classes as follows:

              a.   Two Million (2,000,000) shares of Common Stock,
                   having a par value of $.01 per share.

                   Each share of Common Stock shall be entitled to one vote on
                   any matter submitted to a vote of the shareholders of the
                   Company.


              b.   Six Thousand Two Hundred Sixty (6,260) shares of Preferred 
                   Stock, having a par value of $.01 per share. The Preferred
                   Stock shall be further divided into series, with such
                   designations, powers, preferences and rights and subject to
                   the qualifications, limitations and restrictions as set forth
                   below.


                                 PREFERRED STOCK
                       STATEMENT OF RIGHTS AND PREFERENCES

I.       SERIES A PREFERRED STOCK

         There shall be One Hundred Thirty (130) shares of Series A Preferred
Stock authorized. The terms of the Series A Preferred Stock shall be as follows:

         A.   Dividends.

              1.   Normal Dividends. Simultaneous with consummation of the
                   refinancing and retirement (the "1998 Refinancing
                   Transaction") of the WSDF Note (the " WSDF Note") as defined
                   in the Amended and Restated Securities Purchase Agreement
                   (the "Securities Purchase Agreement") dated as of December 5,



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                                                                     EXHIBIT 3.1


                   1997, by and among Rush Creek LLC, the Company, CB-Kramer
                   Sales and Service, Inc. Whitney Equity Partners, L.P. and
                   Whitney Subordinated Debt Fund L.P. and thereafter on the
                   first day of each August, November, February and May, the
                   holders of the 130 shares of Series A Preferred Stock shall
                   be entitled to receive out of funds of the Company at the
                   time legally available for such purpose dividends at the rate
                   of $2,307.70 per share per year, and no more, payable in cash
                   and without interest. Dividends on all such issued and
                   outstanding preferred shares shall accrue on a daily basis
                   (initially from the date of issuance to the date of payment
                   of the first dividend and, thereafter, from dividend payment
                   date to dividend payment date) whether or not earned or
                   declared and shall be computed on the basis of a 360-day year
                   consisting of twelve 30-day months. Such dividends shall be
                   paid before any dividends shall be declared or paid upon or
                   set apart for the common shares or any other class or series
                   of the Company's capital stock and shall be cumulative, so
                   that if in any year or years dividends upon such outstanding
                   preferred shares shall not have been paid (at the rate set
                   forth above), the amount of the deficiency shall be paid, but
                   without interest, before any distribution, whether by way of
                   dividend or otherwise, shall be declared or paid upon, or set
                   apart for, the common shares or any other class or series of
                   the Company's capital stock.

                   Unless all cumulative dividends on the Series A Preferred
                   Stock (including default dividends as described in Section
                   I.A.2. below) have been or contemporaneously are declared by
                   the Company's Board of Directors and paid or declared and a
                   sum sufficient for the payment thereof set apart by the
                   Company to the date of any event described in Section I.G.
                   below, the Company shall not redeem, purchase, retire or
                   otherwise acquire for any consideration, or make any payment
                   on account of a sinking fund or other similar fund for the
                   redemption, purchase, retirement or acquisition of any other
                   capital stock of the Company (other than the Series B
                   Preferred Stock), or any warrant, right or option to purchase
                   any thereof, or make any distribution in respect thereof,
                   directly or indirectly, whether in cash, obligations or
                   securities of the Company or other property. Notwithstanding
                   the foregoing, the Company shall be entitled to redeem in
                   whole or in part warrants issued pursuant to the Aqua-Chem,
                   Inc. Common Stock Purchase Warrant dated as of July 30, 1997
                   in favor of Rush Creek LLC, a Wisconsin limited liability
                   company ("Warrants"), or the shares of the Company's common
                   stock issued pursuant to such Warrants ("Warrant Shares") in
                   each case in accordance with the terms set forth in the
                   Warrants. The Company shall also be entitled to redeem shares
                   of the Company's common stock issued to employees or
                   consultants of the Company ("Plan Shares") pursuant to the
                   terms of the Aqua-Chem, Inc. 1997 Stock Option Plan or any
                   successor plan adopted by the Company or any agreement (each
                   a "Plan") other than plan shares held by Jeffrey A. Miller
                   ("Miller"), J. Scott Barton ("Barton"),

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                                                                     EXHIBIT 3.1


                   Rand E. McNally ("McNally"), Bruce Dickson ("Dickson"), and
                   Charles Norris ("Norris") (Miller, Barton, McNally, Dickson,
                   Norris, and their permitted transferees are collectively
                   referred to herein as the "Management Group") to the extent
                   such redemptions do not, in the aggregate, exceed 61,919
                   shares of common stock as adjusted for stock splits and
                   combinations of stock.

              2.   Dividends Upon Default.  In the event of a default by the 
                   Company after exercise of the Put Option or Call Option (both
                   as hereinafter defined) in the payment of the redemption
                   price or accrued dividends as required by Section I.G.1. of
                   this Statement of Rights and Preferences (the "Statement"),
                   the rate of dividends on the Series A Preferred Stock from
                   the date of default to the date on which such default is
                   cured shall prospectively increase to $3,461.55 per share per
                   year (a 50% increase) from the date of default to the date on
                   which such default is cured.

         B.   Liquidation and Rank.  In the event of a liquidation, 
              dissolution, or winding up of the Company (whether voluntary or
              involuntary), the holders of the Series A Preferred Stock
              shall be entitled to receive out of the assets of the Company,
              whether such assets are capital or surplus of any nature, an
              amount equal to $38,461.54 per share and, in addition to such
              amount, a further amount equal to the dividends unpaid and
              accumulated thereon, as provided in Section I.A. hereof, to the
              date of such distribution, whether earned or declared or not, and
              no more, before any payment shall be made or any assets
              distributed to the holders of common shares or any other class or
              series of the Company's capital stock (other than the Series B
              Preferred Stock).

              If upon such liquidation, dissolution, or winding up, whether
              voluntary or involuntary, the assets thus distributed among the
              holders of all classes or series of the Company's Series A
              Preferred Stock and Series B Preferred Stock shall be insufficient
              to permit the payment to such shareholders of the full
              preferential amounts, then the entire assets of the Company to be
              distributed shall be distributed ratably among the holders of all
              of the Series A Preferred Stock and Series B Preferred Stock.

              In the event of any such liquidation, dissolution, or winding up
              of the Company, whether voluntary or involuntary, subject to all
              of the preferential rights of the holders of the Series A
              Preferred Stock and all other classes or series of preferred stock
              on distribution or otherwise, the holders of common shares shall
              be entitled to receive, ratably, all of the remaining assets of
              the Company.

              A consolidation or merger of the Company with or into any other
              corporation or corporations or any other event specified in
              Section I.G.1. shall not be deemed to be a liquidation,
              dissolution, or winding up, within the meaning of this clause.

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                                                                     EXHIBIT 3.1


              The Series A Preferred Stock shall rank prior to any other class
              or series of the Company's capital stock (other than the Series B
              Preferred Stock) and in no event shall the Company redeem,
              purchase, retire or otherwise acquire for any consideration, or
              make any payment on account of a sinking fund or other similar
              fund for the redemption, purchase, retirement or acquisition of,
              any other capital stock of the Company (other than the Series B
              Preferred Stock), or any warrant, right or option to purchase any
              thereof, or make any distribution in respect thereof, directly or
              indirectly, whether in cash, obligations or securities of the
              Company or other property prior to the redemption of all of the
              shares of Series A Preferred stock as provided herein.
              Notwithstanding the foregoing, the Company shall be entitled to
              redeem Warrants or Warrant Shares in each case in accordance with
              the terms set forth in the Warrants. The Company shall also be
              entitled to redeem Plan Shares pursuant to the terms of the Plan
              other than Plan Shares held by the Management Group provided such
              redemptions do not, in the aggregate, exceed 61,919 shares as
              adjusted for stock splits and combinations of stock.

         C.   Voting. The holders of the Series A Preferred Stock shall have
              no voting rights except to the extent that such voting rights
              may not be denied under the Delaware General Corporation Law.

         D.   Transfer Restrictions.  Except as hereinafter provided, no holder 
              of the Series A Preferred Stock may transfer such shares. A holder
              of shares of Series A Preferred Stock may, upon furnishing the
              Company with (i) information sufficient for the Company to
              determine in its reasonable judgment that the proposed transfer is
              exempt from registration under the Securities Act of 1933, or (ii)
              an opinion letter from the holder's legal counsel reasonably
              satisfactory in form and substance to the Company as to the
              proposed transfer's compliance with state and federal securities
              laws, transfer all, but not less than all, of the shares of Series
              A Preferred Stock owned by such holder to any corporation
              controlled by, controlling, or under common control with, the
              initial holder of such shares, provided that such transferee is
              not engaged in any business which is in competition with any
              business engaged in by the Company.

         E.   Waiver of Preemptive Rights. Notwithstanding any provision of
              this Certificate of Incorporation, no holder of the Series A
              Preferred Stock shall be entitled as such as a matter of right to
              subscribe for or purchase any part of any new or additional issue
              of stock of any class whatsoever, or of securities convertible
              into stock of any class whatsoever, whether now or hereafter
              authorized, or whether issued for property or services or by way
              of dividend or for cash, and all such rights are waived by each
              holder of Series A Preferred Stock.

         F.   Right to Receive Financial Information; Non-Disclosure. The
              Company shall, on or before August 31 of each year, furnish the
              holders of the Series A Preferred Stock with its internally
              prepared unaudited income statement and balance sheet as at and

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                                                                     EXHIBIT 3.1


              for the six months ended June 30 and, on or before March 31 of
              each year, its annual audited year end income statement and
              balance sheet. Access to such financial statements shall be
              strictly limited by the holders of the Series A Preferred Stock to
              those persons employed by such shareholders and their affiliates
              who have responsibility for monitoring the investment in the
              Company and, under no circumstances, shall such financial
              statements or the information contained therein be made available
              or disclosed to any other persons or used for any other purposes.

         G.   Redemption.

              1.   Put Option.  Each  holder of shares of  the Series A 
                   Preferred Stock shall have the right, upon written notice to
                   the Company, to require the Company to redeem all but not
                   less than all of the shares of Series A Preferred Stock owned
                   by such holder at the date of redemption (the "Put Option")
                   at a price equal to $38,461.54 per share, plus accrued
                   dividends (whether or not earned or declared) (as described
                   in Section I-A above) to and including the date fixed for
                   redemption as follows: (a) at such time as cumulatively more
                   than two thirds (2/3) of the outstanding equity interests in
                   the Company (which for purposes of this entire Section I.G.1.
                   shall be deemed to include any successor thereto or any
                   holding company whose principal asset consists of its
                   investment in the Company or such successor) are in one or
                   more transactions sold to an "Unrelated Third Party", which
                   shall mean one or more parties not directly or indirectly
                   controlled by, controlling, or under common control with the
                   Company (an "Overall Ownership Shift" which, by way of
                   clarification, shall not include a distribution of the
                   outstanding equity interests of the Company owned by Rush
                   Creek LLC to its members); (b) at such time as the Management
                   Group and other then current management employees of the
                   Company or their family members or trusts, limited liability
                   companies or partnerships for their benefit (together, the
                   "Employee Ownership Group") collectively cease to retain a
                   beneficial ownership interest of at least fifty percent (50%)
                   of the percentage equity interest in the Company initially
                   issued to the Employee Ownership Group (excluding any amounts
                   reserved for the Employee Ownership Group which are
                   contingent upon the future performance of the Company) unless
                   such cessation is the result of (i) the issuance of
                   additional equity interest by the Company to persons other
                   than the Employee Ownership Group, or (ii) a sale of equity
                   interests in the Company by the Employee Ownership Group due
                   to the Company's being in substantial distress as, for
                   example, evidenced by the declaration of a default by the
                   holders of the Company's debt instruments (an "Employee
                   Ownership Shift"); (c) upon the transfer of substantially all
                   of the assets of the Company to an Unrelated Third Party,
                   whether by sale, merger, consolidation or otherwise (an
                   "Asset Shift"); (d) at such time as the Company may specify
                   within the 120-day period following either a refinancing and
                   retirement (a "New Refinancing Transaction") of the

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                                                                    EXHIBIT 3.1


                   $125,000,000 senior notes being issued in connection with the
                   1998 Refinancing Transaction or an IPO (as hereinafter
                   defined); or (e) seven years after issuance of the Series A
                   Preferred Stock. In the event that the Put Option would
                   become exercisable by reason of an Overall Ownership Shift or
                   an Employee Ownership Shift under circumstances other than a
                   sale of all of the stock of the Company (other than the
                   Series A and Series B Preferred Stock), and the exercise of
                   the Put Option under such other circumstances would cause the
                   Company to be in default of covenants with its lenders, the
                   exercise of the Put Option shall be deferred until such time
                   as its exercise would not cause a default (but not later than
                   seven (7) years after issuance). During any such deferral
                   period, the Company shall use its best efforts with its
                   lenders to obtain an amendment or waiver to permit such
                   exercise and shall not permit any increase to occur in the
                   compensation payable to any member of the Management Group or
                   repurchase any of its other outstanding stock.
                   Notwithstanding the foregoing, the Company shall be entitled
                   to redeem Warrants or Warrant Shares in each case in
                   accordance with the terms set forth in the Warrants. The
                   Company shall also be entitled to redeem Plan Shares pursuant
                   to the terms of the Plan other than Plan Shares held by the
                   Management Group provided such redemptions do not, in the
                   aggregate, exceed 61,919 shares as adjusted for stock splits
                   and combinations of stock. No such deferral or delay in the
                   exercise of the Put Option shall prevent the termination of
                   the indemnity obligations of the initial holders of the
                   Series A Preferred Stock in accordance with the terms of the
                   Agreement and Plan of Reorganization among the Company and
                   certain other parties dated as of July 30, 1997 (the
                   "Reorganization Agreement").

                   In the event the Company shall propose to take any action of
                   the type described in this Section I.G.1. (or upon the
                   occurrence of any event described in this Section I.G.1., if
                   not within the Company's control), the Company shall give
                   written notice at least 15 days prior to the taking of the
                   proposed action (or within 5 days of any action not in the
                   Company's control) to each stockholder at the post office
                   address as shown on the Company's records which notice shall
                   specify the approximate date on which such action shall take
                   place.

                   Upon the delivery of written notice to the Company of any
                   stockholder's election to redeem all of the Series A
                   Preferred Stock held by such stockholder pursuant to this
                   Section I.G.1., the Company shall, as promptly as practicable
                   after the date of surrender of the redeemed certificates, pay
                   all redemption amounts due to such stockholder.

                   "IPO" shall mean the initial public offering by the Company
                   of its equity securities pursuant a registration statement on
                   Form S-1 or otherwise under the Securities Act of 1933 as
                   amended.

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                                                                    EXHIBIT 3.1


              2.   Call Option.  The Company, at the option of the Board of 
                   Directors, may at any time redeem all or any part of the
                   Series A Preferred Stock by paying in cash therefor an amount
                   equal to $38,461.54 per share, and, in addition to such
                   amount, an amount in cash equal to all dividends on such
                   preferred shares unpaid and accumulated as provided in
                   Section I-A of this Statement, whether or not earned or
                   declared, to and including the date fixed for redemption. In
                   case of the redemption of only a part of such outstanding
                   preferred shares, the Company shall effect such redemption
                   pro rata. At least thirty (30) days' previous notice by mail,
                   postage prepaid, shall be given to the holders of record of
                   the Series A Preferred Stock to be redeemed, such notice to
                   be addressed to each such stockholder at his, her, or its
                   post office address as shown by the records of the Company.
                   On or after the date fixed for redemption and stated in such
                   notice, each holder of such Series A Preferred Stock called
                   for redemption shall surrender his, her, or its certificate
                   evidencing such shares to the Company at the place designated
                   in such notice and shall thereupon be entitled to receive and
                   shall receive on such date payment of the redemption price.
                   In case less than all of the shares represented by any such
                   surrendered certificate are redeemed, a new certificate shall
                   be issued representing the unredeemed shares. If such notice
                   of redemption shall have been duly given, and if on the date
                   fixed for redemption funds necessary for the redemption shall
                   be available therefor, then, notwithstanding that the
                   certificates evidencing any Series A Preferred Stock so
                   called for redemption shall not have been surrendered, the
                   dividends with respect to the shares so called for redemption
                   shall cease to accrue after the date fixed for redemption and
                   all rights with respect to the shares so called for
                   redemption shall forthwith after such date cease, except only
                   the right of the holders to receive the redemption price
                   thereof without interest upon surrender of their certificates
                   therefor.

              3.   Mandatory Redemption. Simultaneous with the consummation of 
                   the 1998 Refinancing Transaction, the holders of the Series A
                   Preferred Stock shall sell and the Company shall purchase and
                   redeem on a pro-rata basis from each of the holders thereof
                   an aggregate of seventy eight (78) shares of the Series A
                   Preferred Stock at a price equal to $38,461.54 per share,
                   plus accrued dividends. On August 1, 2000, the holders of the
                   Series A Preferred Stock shall sell and the Company shall
                   purchase and redeem on a pro-rata basis from each of the
                   holders thereof an aggregate of twenty six (26) shares of the
                   Series A Preferred Stock at a price equal to $38,461.54 per
                   share, plus accrued dividends. On August 1, 2001, the holders
                   of the Series A Preferred Stock shall sell and the Company
                   shall purchase and redeem twenty six on a pro-rata basis from
                   each of the holders thereof an aggregate of (26) shares of
                   the Series A Preferred Stock at a price equal to $38,461.54
                   per share, plus accrued dividends. Each holder of such Series
                   A Preferred Stock being redeemed shall surrender his, her, or
                   its certificate evidencing such shares to

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                                                                    EXHIBIT 3.1


                   the Company at its principal office and shall thereupon be
                   entitled to receive and shall receive on such date payment of
                   the redemption price by wire transfer of immediately
                   available funds to such account as the holder shall direct in
                   writing. In case less than all of the shares represented by
                   any such surrendered certificate are redeemed, a new
                   certificate shall be issued representing the unredeemed
                   shares. If on the date fixed for redemption funds necessary
                   for the redemption shall be available therefor, then,
                   notwithstanding that the certificates evidencing any Series A
                   Preferred Stock scheduled for redemption shall not have been
                   surrendered, the dividends with respect to such shares shall
                   cease to accrue after the date fixed for redemption and all
                   rights with respect to such shares shall forthwith after such
                   date cease, except only the right of the holders to receive
                   the redemption price thereof.

         H.   Offset. Notwithstanding any provision herein to the contrary,
              the actual redemption price paid hereunder for the Series A
              Preferred Stock shall be the redemption price calculated as
              provided hereunder minus the amount of any claims owing under
              Sections 6, 7 and 8 of the Reorganization Agreement.

         I.   Amendment. Notwithstanding any other paragraph or provision 
              hereof, neither the Company nor any of its subsidiaries may amend,
              restate or modify the Certificate of Incorporation, Bylaws or
              other governance documents in a manner which could adversely
              affect the rights of the holders of the Series A Preferred Stock
              without the approval, by vote or written consent, of the holders
              of all of the issued and outstanding Series A Preferred Stock.


II.      SERIES B PREFERRED STOCK.

              There shall be One Hundred Thirty (130) shares of Series B
Preferred Stock authorized. The terms of the Series B Preferred Stock shall be
as follows:

         A.   Dividends.

              1.   Normal Dividends.  The holders of the 130 shares of Series B 
                   Preferred Stock shall be entitled to receive dividends at the
                   rate of $1,538.47 per share per year, and no more, payable in
                   cash, without interest and only upon redemption, out of any
                   funds of the Company at the time legally available for the
                   declaration of dividends, when and as declared by the Board
                   of Directors. Dividends on all such issued and outstanding
                   preferred shares shall accrue from day to day from the date
                   of issuance of such shares to the date set forth in Section B
                   or G hereunder, as the case may be, whether or not earned or
                   declared and shall be computed on the basis of a 360-day year
                   consisting of twelve 30-day months. Such dividends shall be
                   payable before any dividends shall be declared or paid upon
                   or set apart for the common shares or any other

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                                                                     EXHIBIT 3.1


                   class or series of the Company's capital stock (other than
                   the Series A Preferred Stock), and shall be cumulative, so
                   that if in any year or years dividends upon such outstanding
                   preferred shares shall not have been declared (at the rate
                   described above) and set apart therefor, the amount of the
                   deficiency shall be fully declared and set apart for payment,
                   but without interest, before any distribution, whether by way
                   of dividend or otherwise, shall be declared or paid upon, or
                   set apart for, the common shares or any other class or series
                   of the Company's capital stock (other than the Series A
                   Preferred Stock).

                   Unless all cumulative dividends on the Series B Preferred
                   Stock (including default dividends as described in Section
                   II.A.2. below) have been or contemporaneously are declared by
                   the Company's Board of Directors and paid or declared and a
                   sum sufficient for the payment thereof set apart by the
                   Company to the date of any event described in Section II.G.
                   below, the Company shall not redeem, purchase, retire or
                   otherwise acquire for any consideration, or make any payment
                   on account of a sinking fund or other similar fund for the
                   redemption, purchase, retirement or acquisition of any other
                   capital stock of the Company (other than the Series A
                   Preferred Stock), or any warrant, right or option to purchase
                   any thereof, or make any distribution in respect thereof,
                   directly or indirectly, whether in cash, obligations or
                   securities of the Company or other property. Notwithstanding
                   the foregoing, the Company shall be entitled to redeem
                   Warrants or Warrant Shares in each case in accordance with
                   the terms set forth in the Warrants. The Company shall also
                   be entitled to redeem Plan Shares pursuant to the terms of
                   any Plan other than Plan Shares held by the Management Group
                   provided such redemptions do not, in the aggregate, exceed
                   61,919 shares as adjusted for stock splits and combinations.


              2.   Dividends Upon Default. In the event of a default by the
                   Company after exercise of the Put Option or Call Option (both
                   as hereinafter defined) in the payment of the redemption
                   price or accrued dividends as required by Section II.G.1. of
                   this Statement, the rate of dividends on the Series B
                   Preferred Stock from the date of default to the date on which
                   such default is cured shall prospectively increase to
                   $2,307.69 per share per year (a 50% increase) from the date
                   of default to the date on which such default is cured.

         B.   Liquidation and Rank. In the event of a liquidation, dissolution,
              or winding up of the Company (whether voluntary or involuntary),
              the holders of the Series B Preferred Stock shall be entitled to
              receive out of the assets of the Company, whether such assets are
              capital or surplus of any nature, an amount per share equal to
              1/130th of the Redemption Price (as hereinafter defined) and, in
              addition to such amount, a further amount equal to the dividends
              unpaid and accumulated thereon, as provided

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                                                                    EXHIBIT 3.1


              in Section II.A hereof, to the date of such distribution, whether
              earned or declared or not, and no more, before any payment shall
              be made or any assets distributed to the holders of common shares
              or any other class or series of the Company's capital stock (other
              than the Series A Preferred Stock).

              If upon such liquidation, dissolution, or winding up, whether
              voluntary or involuntary, the assets thus distributed among the
              holders of all classes or series of the Company's Series A
              Preferred Stock and Series B Preferred Stock shall be insufficient
              to permit the payment to such shareholders of the full
              preferential amounts, then the entire assets of the Company to be
              distributed shall be distributed ratably among the holders of the
              Series A Preferred Stock and Series B Preferred Stock.

              In the event of any such liquidation, dissolution, or winding up
              of the Company, whether voluntary or involuntary, subject to all
              of the preferential rights of the holders of the Series B
              Preferred Stock and all other classes or series of preferred stock
              on distribution or otherwise, the holders of common shares shall
              be entitled to receive ratably all of the remaining assets of the
              Company.

              A consolidation or merger of the Company with or into any other
              corporation or corporations or any other event specified in
              II.G.1. shall not be deemed to be a liquidation, dissolution, or
              winding up, within the meaning of this clause.

              The Series B Preferred Stock shall rank prior to any other class
              or series of the Company's capital stock (other than the Series A
              Preferred Stock) and in no event shall the Company redeem,
              purchase, retire or otherwise acquire for any consideration, or
              make any payment on account of a sinking fund or other similar
              fund for the redemption, purchase, retirement or acquisition of
              any other capital stock of the Company (other than the Series A
              Preferred Stock), or any warrant, right or option to purchase any
              thereof, or make any distribution in respect thereof, directly or
              indirectly, whether in cash, obligations or securities of the
              Company or other property prior to the redemption of all of the
              shares of Series A Preferred Stock and Series B Preferred Stock as
              provided herein. Notwithstanding the foregoing, the Company shall
              be entitled to redeem Warrants or Warrant Shares in each case in
              accordance with the terms set forth in the Warrants. The Company
              shall also be entitled to redeem Plan Shares pursuant to the terms
              of any Plan, other than shares held by the Management Group
              provided such redemptions do not, in the aggregate, exceed 61,919
              shares as adjusted for stock splits and combinations of stock.

         C.   Voting.  The holders of the Series B Preferred Stock shall have 
              no voting rights except such voting rights as may not be denied
              under the Delaware General Corporation Law.


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                                                                    EXHIBIT 3.1


         D.   Transfer Restrictions.  Except as hereinafter provided, no holder 
              of the Series B Preferred Stock may transfer such shares. A holder
              of shares of Series B Preferred Stock may, upon furnishing the
              Company with (i) information sufficient for the Company to
              determine in its reasonable judgment that the proposed transfer is
              exempt from registration under the Securities Act of 1933, or (ii)
              an opinion letter from the holder's legal counsel reasonably
              satisfactory in form and substance to the Company as to the
              proposed transfer's compliance with state and federal securities
              laws, transfer all, but not less than all, of the shares of Series
              B Preferred Stock owned by such holder to any corporation
              controlled by, controlling, or under common control with, the
              initial holder of such shares, provided that such transferee is
              not engaged in any business which is in competition with any
              business engaged in by the Company.

         E.   Waiver of Preemptive Rights. Notwithstanding any provision of
              this Certificate of Incorporation, no holder of the Series B
              Preferred Stock shall be entitled as such as a matter of right to
              subscribe for or purchase any part of any new or additional issue
              of stock of any class whatsoever, or of securities convertible
              into stock of any class whatsoever, whether now or hereafter
              authorized, or whether issued for property or services or by way
              of dividend or for cash, and all such rights are waived by each
              holder of Series B Preferred Stock.

         F.   Right to Receive Financial Information; Non-Disclosure.  The 
              Company shall, on or before August 31 of each year, furnish the
              holders of the Series B Preferred Stock with its internally
              prepared unaudited income statement and balance sheet as at and
              for the six months ended June 30 and, on or before March 31 of
              each year, its annual audited year end income statement and
              balance sheet. Access to such financial statements shall be
              strictly limited by the holders of the Series B Preferred Stock to
              those persons employed by such shareholders and their affiliates
              who have responsibility for monitoring the investment in the
              Company and, under no circumstances, shall such financial
              statements or the information contained therein be made available
              or disclosed to any other persons or used for any other purposes.

         G.   Redemption.

              1.   Put Option.  Each holder of shares of the Series B Preferred 
                   Stock shall have the right, upon written notice to the
                   Company, to require the Company to redeem all but not less
                   than all of the shares of Series B Preferred Stock owned by
                   such holder at the date of redemption (the "Put Option") at a
                   per share price equal to 1/130th of the "Redemption Price"
                   (as defined in Section II.H. below), plus accrued dividends
                   (whether or not earned or declared) (as described in Section
                   II.A. above) to and including, the date fixed for redemption
                   as follows: (a) upon the occurrence of an Overall Ownership
                   Shift, Employee Ownership Shift or Asset Shift; (b) at such
                   time as the Company may specify within the 120-day period
                   following either a New

                                       11

   12

                                                                    EXHIBIT 3.1


                   Refinancing Transaction or an IPO (as hereinafter defined);
                   or (c) seven years after issuance of the Series B Preferred
                   Stock. In the event that the Put Option would become
                   exercisable by reason of an Overall Ownership Shift or an
                   Employee Ownership Shift under circumstances other than a
                   sale of all of the stock of the Company (other than the
                   Series A and Series B Preferred Stock), and the exercise of
                   the Put Option under such other circumstances would cause the
                   Company to be in default of covenants with its lenders, the
                   exercise of the Put Option shall be deferred until such time
                   as its exercise would not cause a default (but not later than
                   seven (7) years after issuance). During any such deferral
                   period, the Company shall use its best efforts with its
                   lenders to obtain an amendment or waiver to permit such
                   exercise and shall not permit any increase to occur in the
                   compensation payable to any member of the Management Group or
                   repurchase any of its other outstanding stock.
                   Notwithstanding the foregoing, the Company shall be entitled
                   to redeem Warrants or Warrant Shares in each case in
                   accordance with the terms set forth in the Warrants. The
                   Company shall also be entitled to redeem Plan Shares pursuant
                   to the terms of any Plan other than Plan Shares held by the
                   Management Group provided such redemptions do not, in the
                   aggregate, exceed 61,919 shares as adjusted for stock splits
                   and combinations of stock. No such deferral or delay in the
                   exercise of the Put Option shall prevent the termination of
                   the indemnity obligations of the initial holders of the
                   Series B Preferred Stock in accordance with the terms of the
                   Reorganization Agreement.

                   In the event the Company shall propose to take any action of
                   the type described in this Section II.G.1. (or upon the
                   occurrence of any event described in this Section II.G.1., if
                   not within the Company's control), the Company shall give
                   written notice at least 15 days prior to the taking of the
                   proposed action (or within 5 days of any action not in the
                   Company's control) to each stockholder at the post office
                   address as shown on the Company's records which notice shall
                   specify the approximate date on which such action shall take
                   place.

                   Upon the delivery of written notice to the Company of any
                   stockholder's election to redeem all of the Series B
                   Preferred Stock held by such stockholder pursuant to this
                   Section II.G.1., the Company shall, as promptly as
                   practicable after the date of surrender of the redeemed
                   certificates, pay all redemption amounts due to such
                   stockholder.


              2.   Call Option. The Company, at the option of the Board of
                   Directors, may at any time after December 31, 2001 redeem all
                   or any part of the Series B Preferred Stock by paying in cash
                   therefor an amount equal to 1/130th of the Redemption Price
                   per share and, in addition to such amount, an amount in cash
                   equal to all dividends on such preferred shares unpaid and
                   accumulated

                                       12

   13

                                                                    EXHIBIT 3.1


                   as provided in this Section II.A, whether or not earned or
                   declared, to and including the date fixed for redemption. In
                   case of the redemption of only a part of such outstanding
                   preferred shares, the Company shall effect such redemption
                   pro rata. At least thirty (30) days' previous notice by mail,
                   postage prepaid, shall be given to the holders of record of
                   the Series B Preferred Stock to be redeemed, such notice to
                   be addressed to each such stockholder at his post office
                   address as shown by the records of the Company. On or after
                   the date fixed for redemption and stated in such notice, each
                   holder of such Series B Preferred Stock called for redemption
                   shall surrender his certificate evidencing such shares to the
                   Company at the place designated in such notice and shall
                   thereupon be entitled to receive and shall receive on such
                   date payment of the redemption price. In case less than all
                   of the shares represented by any such surrendered certificate
                   are redeemed, a new certificate shall be issued representing
                   the unredeemed shares. If such notice of redemption shall
                   have been duly given, and if on the date fixed for redemption
                   funds necessary for the redemption shall be available
                   therefor, then, notwithstanding that the certificates
                   evidencing any Series B Preferred Stock so called for
                   redemption shall not have been surrendered, the dividends
                   with respect to the shares so called for redemption shall
                   cease to accrue after the date fixed for redemption and all
                   rights with respect to the shares so called for redemption
                   shall forthwith after such date cease, except only the right
                   of the holders to receive the redemption price thereof
                   without interest upon surrender of their certificates
                   therefor.

         H.   Redemption Price.

              1.   Normal Redemption Price. Except as hereinafter specifically
                   set forth to the contrary Certificate of Incorporation, the
                   redemption price of the Series B Preferred Stock (the
                   "Redemption Price") shall be the "Normal Redemption Price"
                   which shall be based upon the Company's Water Tech Division's
                   cumulative earnings before income taxes ("EBIT"), for the
                   period 1997 through 2001 as set forth below (except as set
                   forth in II.H.1.(f).).

                   (a)  If actual cumulative EBIT is less than 80% of the 
                        cumulative EBIT shown on Schedule A, attached hereto,
                        the Normal Redemption Price shall be zero.

                   (b)  If actual cumulative EBIT is 80% of the cumulative EBIT
                        shown on Schedule A, the Normal Redemption Price shall
                        be $2,500,000.

                   (c)  If actual cumulative EBIT is more than 80%, but less
                        than 120%, of the cumulative EBIT shown on Schedule A,
                        the Normal Redemption Price shall be $2,500,000 plus
                        $125,000 for each percentage point by which the actual
                        cumulative EBIT exceeds 80% of the cumulative

                                       13

   14

                                                                    EXHIBIT 3.1


                        EBIT shown on Schedule A (prorated for each portion of a
                        percentage point).

                   (d)  If actual cumulative EBIT is 120% or more of the
                        cumulative EBIT shown on Schedule A, the Normal
                        Redemption Price shall be $7,500,000.

                   (e)  The cumulative EBIT thresholds shown on Schedule A
                        shall not be adjusted in the event of an acquisition.

                   (f)  If, prior to December 31, 2001, either (a) the business
                        of the Company's Water Tech Division (the "Water Tech
                        Business") is sold to an Unrelated Third Party or (b)
                        there occurs an IPO, an Overall Ownership Shift, an
                        Asset Shift or an Employee Ownership Shift, then in any
                        of such events, the Normal Redemption Price shall be
                        computed as of the end of the month preceding the date
                        of any such event.

              2.   Redemption Price if Water Tech Business Sold. If the Water
                   Tech Business is sold to an Unrelated Third Party prior to
                   redemption of the Series B Preferred Stock, the Redemption
                   Price shall be the greater of (i) the Normal Redemption Price
                   or (ii) the "Alternative Redemption Price", as hereinafter
                   defined.

              3.   Redemption Price if IPO Occurs.  If, prior to the first to 
                   occur of (i) December 31, 2001 or (ii) a sale of the Water
                   Tech Business to an Unrelated Third Party, there occurs an
                   IPO, then, in such event, but only in such event, the
                   Redemption Price shall be the greatest of (a) $5,000,000, (b)
                   the Normal Redemption Price, or (c) the Alternative
                   Redemption Price. In determining the Alternative Redemption
                   Price in the event of an IPO, the Alternative Redemption
                   Price provisions applicable upon a sale of the Water Tech
                   Business shall be applied, with the Water Tech Business being
                   deemed to have been sold at a selling price representing the
                   same multiple of Water Tech EBIT for the most recently
                   completed fiscal year as the multiple of Company-wide EBIT
                   for such fiscal year that the offering price in the IPO
                   represents. If the IPO occurs after December 31, 2001, but
                   before a sale of the Water Tech business, the Redemption
                   Price for the Series B Preferred Stock shall be the Normal
                   Redemption Price, unless the Normal Redemption Price is zero,
                   in which event the Redemption Price shall be the Alternative
                   Redemption Price.

              4.   Redemption Price if Sale of Company Occurs. If, prior to the 
                   first to occur of (i) December 31, 2001 or (ii) a sale of the
                   Water Tech Business to an Unrelated Third Party, there occurs
                   either (a) an Overall Ownership Shift, (b)

                                       14

   15

                                                                    EXHIBIT 3.1


                   an Employee Ownership Shift or (c) an Asset Shift and, in the
                   further event that, at the time of the closing of a
                   transaction described in clause (a), (b) or (c) above, the
                   actual cumulative Company-wide EBIT for the cumulative period
                   beginning January 1, 1997 and ending on such closing date is
                   at least 80% of the projected cumulative Company-wide EBIT
                   for such cumulative period as set forth in Schedule A, then,
                   in the event that all of the preceding conditions precedent
                   have been met, the Redemption Price for the Series B
                   Preferred Stock shall be the greatest of (x) $5,000,000, (y)
                   the Normal Redemption Price, or (z) the Alternative
                   Redemption Price. In determining the Alternative Redemption
                   Price in the event of a sale transaction described in this
                   paragraph, the Water Tech Business shall be deemed to have
                   been sold at a selling price representing the same multiple
                   of Water Tech EBIT for the most recently completed fiscal
                   year as (i) in the event of an Overall Ownership Shift or an
                   Employee Ownership Shift, the multiple of per share
                   Company-wide EBIT for such fiscal year that the actual per
                   share selling price of a share of the Company's common stock
                   represents or (ii) in the event of an Asset Shift, the
                   multiple of Company-wide EBIT for such year that the selling
                   price (adjusted for any retained assets or liabilities)
                   represents. If (a), (b) or (c) above occur after December 31,
                   2001, but before a sale of the Water Tech Business, or if
                   they occur and the Company-wide EBIT test above has not been
                   met, the Redemption Price shall be the Alternative Redemption
                   Price and the Water Tech business shall be deemed to have
                   been sold at a selling price representing the same multiple
                   of Water Tech EBIT for the most recently completed fiscal
                   year as the multiple of per share Company-wide EBIT for such
                   fiscal year that the actual selling price of the Company's
                   common stock represents.

                   For purposes of this Section II.H., the selling price shall
                   include all consideration paid for the business sold,
                   including, but without limitation, all cash, securities,
                   property and other assets received by the seller. All
                   consideration to be received by seller which is contingent on
                   the occurrence of future events shall be valued on the
                   selling date in a manner mutually agreeable to the Company
                   and the Series B Preferred stockholders.

              5.   Alternative Redemption Price. The Alternative Redemption
                   Price shall be determined as set forth below:

                   (a)  If the sale of the Water Tech Business occurs prior to
                        July 30, 2002, the Alternative Redemption Price shall be
                        an amount equal to the sum of (1) $10,000 multiplied by
                        each percentage point of the net book value of the
                        assets of the Water Tech Division ("NBV") that the
                        actual selling price represents, up to and including
                        200% of NBV, plus (2) $15,000 multiplied by each
                        percentage point of NBV above

                                       15

   16

                                                                    EXHIBIT 3.1


                        200% that the actual selling price represents (and in
                        each case prorated for each portion of a percentage
                        point).

                   (b)  If the sale of the Water Tech Business occurs on or
                        after July 30, 2002, the Alternative Redemption Price
                        shall be one-half of the amount determined under the
                        immediately preceding formula in Section II.H.5(a)
                        above.

                   (c)  If the actual selling price of the Water Tech Business
                        represents less than 50% of NBV, the Alternative
                        Redemption Price shall be zero.

                   (d)  In determining the selling price for purposes of the
                        preceding calculations, an appropriate dollar-for-dollar
                        adjustment shall be made to reflect any Water Tech
                        assets or liabilities retained by the Company.

              6.   Maximum Redemption Price. Notwithstanding anything to the
                   contrary herein, the maximum Redemption Price under any
                   circumstances or alternatives shall not exceed $7,500,000.

         I.   Auditors; Dispute Resolution.  The Company shall retain a Big Six 
              accounting firm to audit its annual financial statements and may
              switch to a non-Big Six accounting firm only with the prior
              written consent of the holders of the Series B Preferred Stock,
              which consent shall not unreasonably be withheld. In connection
              with any redemption of the Series B Preferred Stock, such
              shareholders or their representatives (upon execution of a
              confidentiality agreement) shall have the right to review the
              Company's determination of the Redemption Price and its auditors'
              work papers. Any disputes regarding the determination of the
              Redemption Price shall be resolved by binding arbitration in
              Chicago, Illinois in accordance with the rules of the American
              Arbitration Association by a panel of three arbitrators. Any award
              so obtained may be enforced in any Wisconsin state court or the
              Federal Court of the United States sitting in Milwaukee, Wisconsin
              and a judgment in any such action or proceeding shall be
              conclusive and may be enforced in other jurisdictions by suit on
              the judgment or in any other manner provided by law.

         J.   No Reorganization. Until the Company has redeemed all of the
              shares of Series B Preferred Stock, the Company shall not, without
              the prior written consent of all of the Series B Preferred
              shareholders thereof, reorganize, restructure or otherwise
              transfer any of the assets of its Water Tech Business or do any
              other action that would have the effect of altering the
              calculation of the Redemption Price hereunder.

         K.   Offset.  Notwithstanding any provision herein to the contrary, 
              the actual redemption price paid hereunder for the Series B
              Preferred Stock shall be the redemption price

                                       16

   17


                                                                    EXHIBIT 3.1


              calculated as provided in Section H hereunder minus the amount of
              any claims owing under Sections 6, 7 and 8 of the Reorganization
              Agreement.

         L.   Amendment. Notwithstanding any other paragraph or provision
              hereof, neither the Company nor any of its subsidiaries may amend,
              restate or modify the Certificate of Incorporation, Bylaws or
              other governance documents which could adversely affect the rights
              of the holders of the Series B Preferred Stock without the
              approval, by vote or written consent, of the holders of all of the
              issued and outstanding Series B Preferred Stock.


III.     SERIES C PREFERRED STOCK

         There shall be Six Thousand (6,000) shares of Series C Preferred Stock
authorized. The terms of the Series C Preferred Stock shall be as follows:

         A.   Dividends.  The holders of Series C Preferred Stock shall be 
              entitled to receive quarterly dividends at the rate of ten and
              17/100 percent (10.17%) per annum on the Original Issue Price (as
              hereinafter defined), and no more, payable in cash only upon
              redemption thereof, upon the liquidation, dissolution or winding
              up of the Company or upon the occurrence of an Overall Ownership
              Shift, an Employee Ownership Shift, an Asset Shift or an IPO, out
              of any funds of the Company at the time legally available for the
              declaration of dividends, when and as declared by the Board of
              Directors. Dividends on all such issued and outstanding shares of
              Series C Preferred Stock shall accrue from day to day from the
              date of issuance of such shares to the date set forth in Section B
              or C hereunder, as the case may be, whether or not earned or
              declared and shall be computed o the basis of a 360 day year
              consisting of twelve 30-day months. Such dividends shall be
              payable before any dividends shall be declared or paid upon or set
              apart for the common shares or any other class or series of the
              Company's capital stock (other than the Series A and Series B
              Preferred Stock), and shall be cumulative, so that if in any year
              or years dividends upon such outstanding shares of Series C
              Preferred Stock shall not have been declared (at the rate
              described above) and set apart therefor, the amount of the
              deficiency shall be fully declared and set apart for payment, but
              without interest, before any distribution, whether by way of
              dividends or otherwise, shall be declared or paid upon, or set
              apart for, the common shares or any other class or series of the
              Company's capital stock (other than the Series A and Series B
              Preferred Stock).

         B.   Liquidation. In the event of a liquidation, dissolution, or
              winding up of the Company (whether voluntary or involuntary), the
              holders of the Series C Preferred Stock shall be entitled to
              receive out of the assets of the Company, whether such assets are
              capital or surplus of any nature, subject to the preferential
              rights of the Series A and Series B Preferred Stock, an amount
              equal to one hundred percent (100%) of the Original Issue Price,
              and, in addition to such amount, a further amount equal to the

                                       17

   18


                                                                    EXHIBIT 3.1


              dividends unpaid and accumulated thereon, as provided in Section
              III-A of this Statement, to the date of such distribution, whether
              earned or declared or not, and no more, before any payment shall
              be made or any assets distributed to the holders of common shares
              or any other class or series of the Company's capital Stock (other
              than the Series A and Series B Preferred Stock).

              If upon such liquidation, dissolution, or winding up, whether
              voluntary or involuntary, the assets thus distributed among the
              holders of the Series C Preferred Stock shall be insufficient to
              permit the payment to such holders of the Series C Preferred Stock
              of the full preferential amounts, then such assets to be
              distributed shall be distributed ratably among the holders of the
              Series C Preferred Stock.

              In the event of any such liquidation, dissolution, or winding up
              of the Company, whether voluntary or involuntary, subject to all
              of the preferential rights of the holders of the Series A, Series
              B and Series C Preferred Stock on distribution or otherwise, the
              holders of common shares shall be entitled to receive ratably all
              of the remaining assets of the Company.

              A consolidation or merger of the Company with or into any other
              corporation or corporations or other events specified in Section
              I.G.1. shall not be deemed to be a liquidation, dissolution, or
              winding up, within the meaning of this clause.

              Original Issue Price shall mean one thousand dollars ($1,000) per
              share for each of the then outstanding series of Series C
              Preferred Stock, as may be adjusted for subdivisions or
              combinations of the Series C Preferred Stock.

         C.   Redemption.

              1.   Put Option.  Notwithstanding any provision in this 
                   Certificate of Incorporation, including without limitation
                   any provision of Section I or Section II, the holders of the
                   Series C Preferred Stock shall have the right, if the holders
                   of a majority of the issued and outstanding shares of Series
                   C Preferred Stock so elect, and after providing written
                   notice to the Company, to require the Company to redeem all
                   or any part of the Series C Preferred Stock (the "Put
                   Option") at a price equal to one thousand dollars ($1,000)
                   per share (the "Series C Redemption Price"), plus accrued
                   dividends (as described in Section III-A above) as follows:
                   (i) upon the occurrence of an Overall Ownership Shift, an
                   Employee Ownership Shift or an Asset Shift; (ii) within the
                   120-day period following an IPO; or (iii) eight (8) years
                   after issuance.

              2.   Call Option. Notwithstanding any provision in this
                   Certificate of Incorporation, including without limitation
                   any provision of Section I or Section II, the Company, at the
                   option of the Board of Directors, may,

                                       18

   19


                                                                    EXHIBIT 3.1


                   provided the Series A and Series B Preferred Stock have been
                   previously redeemed, at any time after seven years redeem all
                   or any part of the Series C Preferred Stock by paying in cash
                   therefor an amount equal to the pro-rata portion of the
                   Series C Redemption Price per share, and, in addition to such
                   amount, an amount in cash equal to all dividends on such
                   shares of Series C Preferred Stock unpaid and accumulated as
                   provided in Section III-A of this Statement, whether or not
                   earned or declared, to and including the date fixed for
                   redemption. In case of the redemption of only a part of such
                   outstanding Series C Preferred Stock, the Company shall
                   effect such redemption pro rata. At least thirty (30) days'
                   previous notice by mail, postage prepaid, shall be given to
                   the holders of record of the Series C Preferred Stock to be
                   redeemed, such notice to be addressed to each such
                   stockholder at his post office address as shown by the
                   records of the Company. On or after the date fixed for
                   redemption and stated in such notice, each holder of such
                   Series C Preferred Stock called for redemption shall
                   surrender his certificate evidencing such shares to the
                   Company at the place designated in such notice and shall
                   thereupon be entitled to receive and shall receive on such
                   date payment of the redemption price. In case less than all
                   of the shares represented by any such surrendered certificate
                   are redeemed, a new certificate shall be issued representing
                   the unredeemed shares. If such notice of redemption shall
                   have been duly given, and if on the date fixed for redemption
                   funds necessary for the redemption shall be available
                   therefor, then, notwithstanding that the certificates
                   evidencing any Series C Preferred Stock so called for
                   redemption shall not have been surrendered, the dividends
                   with respect to the shares so called for redemption shall
                   cease to accrue after the date fixed for redemption and all
                   rights with respect to the shares so called for redemption
                   shall forthwith after such date cease, except only the right
                   of the holders to receive the redemption price thereof
                   without interest upon surrender of their certificates
                   therefor.

         D.   Voting. Each share of Series C Preferred Stock shall have the
              voting rights equivalent to the rights of one share of common
              stock.

         E.   Restrictions on Corporate Actions. Notwithstanding any other
              paragraph or provision hereof, none of the following actions may
              be taken by the Company or any of its Subsidiaries without the
              approval by vote or written consent of the holders of a majority
              of all issued and outstanding shares of Series C Preferred Stock:

              1.   During the period beginning July 30, 1997 and ending on 
                   July 29, 2005, the consummation of an Organic Transaction (as
                   defined below).

              2.   Any amendment, restatement or modification of the Certificate
                   of Incorporation, By-laws (the "BY-LAWS") or other governance
                   documents

                                       19

   20


                                                                    EXHIBIT 3.1


                   which could adversely affect the rights of the holders of    
                   the Series C Preferred Stock;

              3.   Declaration or payment of any dividend or making of any
                   distribution on or with respect to the Common Stock or any
                   other capital stock (other than the Series A, Series B, and
                   Series C Preferred Stock);

              4.   Except as permitted herein with respect to the Series A, 
                   Series B and Series C Preferred Stock, purchase, redeem or
                   retire, directly or indirectly, of any shares of capital
                   stock or other equity securities of the Company (or any
                   securities convertible or exchangeable into such securities);

              5.   Authorization, creation or issuance of any shares of capital
                   stock or other securities other than shares of Series A
                   Preferred Stock and Series B Preferred Stock issued in
                   accordance with the Agreement and Plan of Reorganization by
                   and among Rush Creek LLC, Aqua-Chem, Inc., A-C Acquisition
                   Corp., Miller, Lyonnaise American Holding, Inc., and Gestra
                   Corporation, N.V.

              6.   Incurrence of Indebtness (as defined in the Securities 
                   Purchase Agreement) other than as described in paragraphs (a)
                   through (l) of Section 9.4 of the Securities Purchase
                   Agreement. References herein to any defined terms or
                   provisions of the Securities Purchase Agreement is to such
                   terms and provisions as in effect as of the date of the
                   Securities Purchase Agreement, without regard to any
                   subsequent, termination, amendment or other modification to
                   such terms or provisions.

              7.   Any amendment, restatement or modification of the terms of,
                   or documentation relating to Indebtedness of the Company
                   other than as permitted in the Securities Purchase Agreement.
                   References herein to any defined terms or provisions of the
                   Securities Purchase Agreement is to such terms and provisions
                   as in effect as of the date of the Securities Purchase
                   Agreement, without regard to any subsequent, termination,
                   amendment or other modification to such terms or provisions.

              8.   Engaging in any business other than the business in which
                   the Company or its Subsidiaries are currently engaged;

              9.   A voluntary dissolution, liquidation or winding up;

              10.  Enter into any transaction or agreement with, or make any 
                   payment to, any Affiliate, officer or director of the
                   Company, amend or terminate any existing agreement with any
                   Affiliate, officer or director of the Company, purchase from
                   or provide to any Affiliate, officer or director of the
                   Company any

                                       20

   21


                                                                    EXHIBIT 3.1


                   selling, general management or administrative services,
                   directly or indirectly make any sales to or purchases from
                   any Affiliate, officer or director of the Company; or

              11.  The sale of any assets of business of the company or any of
                   its Subsidiaries or the acquisition of assets that would be
                   prohibited by the Securities Purchase Agreement, as in effect
                   as of the date hereof, without regard to any subsequent,
                   termination, amendment or other modification of the Securites
                   Purchase Agreement.

For the purposes hereof the term (1) "ORGANIC TRANSACTION" means (x) the sale,
lease, exchange, transfer or other disposition of all or substantially all of
the Company's assets to a person or group of persons (y) any merger,
consolidation, refinancing or recapitalization that results in the holders of
the issued and outstanding voting securities of the Company immediately prior to
such transaction owning or controlling less than a majority of the voting
securities of the continuing or surviving entity immediately following such
transaction and/or (z) any person or persons acting together or which would
constitute a "group" for the purposes of Section 13(d) of the Securities
Exchange Act of 1934, as amended (the "EXCHANGE ACT"), together or with any
Affiliates thereof, other than the holders of the Common Stock or their
permitted transferees as of July 30, 1997, and the holders of the Series C
Preferred Stock as of July 30, 1997, and their respective Affiliates,
beneficially owning (as defined in Rule 13d-3 of the Exchange Act) or
controlling, directly or indirectly, at least 50% of the total voting power of
all classes of capital stock entitled to vote generally in the election of
Directors of the Company; and (2) "AFFILIATE" shall have the meaning assigned to
that term in Regulation 12b-2 promulgated under the Securities Exchange Act of
1934, as amended.

         ARTICLE FIVE. A majority vote of the shareholders entitled to vote on a
matter shall be required for action on that matter.

         ARTICLE SIX. The board of directors is authorized to make, alter or
repeal the by-laws of the Company.

         ARTICLE SEVEN. No director shall be liable to the Company or any of its
stockholders for monetary damages for breach of fiduciary duty as a director,
except with respect to (1) a breach of the director's duty of loyalty to the
Company or its stockholders, (2) acts or omissions not in good faith or which
involve intentional misconduct or a knowing violation of law, (3) liability
under Section 174 of the Delaware General Corporation Law or (4) a transaction
from which the director derived an improper personal benefit, it being the
intention of the foregoing provision to eliminate the liability of the Company's
directors to the Company or its stockholders to the fullest extent permitted by
Section 102(b)(7) of the Delaware General Corporation Law, as amended from time
to time. The Company shall indemnify to the fullest extent permitted by Sections
102(b)(7) and 145 of the Delaware General Corporation Law, as amended from time
to time, each person that such Sections grant the Company the power to
indemnify.


                                       21

   22


                                                                    EXHIBIT 3.1


         ARTICLE EIGHT. The name and mailing address of the sole incorporator
is:

                                    James A. Feddersen
                                    Whyte Hirschboeck Dudek S.C.
                                    111 E. Wisconsin Avenue
                                    Suite 2100
                                    Milwaukee, WI 53202



         I, THE UNDERSIGNED, being the incorporator hereinbefore named, for the
purpose of forming a corporation pursuant to the General Corporation Law of the
State of Delaware, do make this certificate, hereby declaring and certifying
that this is my act and deed and the facts herein stated are true, and
accordingly have hereunto set my hand this 31st day of July, 1997.



                                       /S/ James A. Feddersen
                                       -----------------------------------------
                                       James A. Feddersen, Sole Incorporator

















                                       22

   23


                                                                     EXHIBIT 3.1

                                   SCHEDULE A

                                   WATER TECH
                   PROJECTED EARNINGS BEFORE INCOME AND TAXES
                                   1997 - 2001


                                    EBIT

1997                                $2,474,000
1998                                $3,156,000
1999                                $4,720,000
2000                                $6,890,000
2001                                $8,979,000



                                 AQUA-CHEM, INC.
                   PROJECTED EARNINGS BEFORE INCOME AND TAXES
                                    1997-2001


                                    EBIT

1997                                $13,065,000
1998                                $15,108,000
1999                                $19,684,000
2000                                $25,454,000
2001                                $32,713,000















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