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               UNITED STATES SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C. 20549



                                    Form 8-K
                                        

                                 CURRENT REPORT
                                        
                                        
    Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934
                                        

 
Date of Report (Date of earliest event reported):   July 2, 1998
Commission File Number:  0-10095



                             Unit Instruments, Inc.
            (Exact name of registrant as specified in its charter)


            California                                         33-0077406
   (State or other jurisdiction                             (I.R.S. Employer
         of Incorporation)                               Identification Number)
                                        

            22600 Savi Ranch Parkway, Yorba Linda, California  92887
             (Address of principal executive offices and zip code)
                                        
 
       Registrant's telephone number, including area code: (714) 921-2640
                                        




                 This Report consists of forty-nine (49) pages.

                                        
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Item 5.   Other Events
          ------------

On July 2, 1998, United States Filter Corporation ("U.S. Filter"), Kinetics
Acquisition Corp., a California corporation and wholly owned subsidiary of U.S.
Filter ("Subcorp"), and  Unit Instruments, Inc. ("Unit") executed an Agreement
and Plan of Merger, a copy of which is incorporated by reference as Exhibit 3.1
hereto (the "Merger Agreement").  Pursuant to the terms of the Merger Agreement,
which is incorporated herein by reference, Subcorp will, subject to certain
conditions being satisfied or waived, be merged with and into Unit (the
"Merger") and Unit will survive the merger (the "Surviving Corporation") and
become a wholly owned subsidiary of U.S. Filter.

Upon the effectiveness of the Merger, each outstanding share of common stock,
par value $0.15 per share ("Common Stock"), of Unit, with the exception of
shares held by shareholders who properly exercise dissenters' rights under the
Corporations Code of the State of California, will be converted into a number of
shares of U.S. Filter's common stock equal to the Exchange Ratio (as defined
below), collectively, the "Merger Consideration."

The exchange ratio (the "Exchange Ratio") will be calculated as follows: (a) if
the average daily closing price (the "Average Closing Price") on the New York
Stock Exchange of U.S. Filter's common stock during the 20 consecutive trading
days ending five days prior to the Shareholders' Meeting, at which the Unit
shareholders are to vote on the Merger, is equal to or exceeds $27.00, the
Exchange Ratio will be equal to $12.62 divided by the Average Closing Price; and
(b) if the Average Closing Price is less than $27.00, the Exchange Ratio will be
equal to $12.62 divided by $27.00.  If the Average Closing Price is less than
$24.00, Unit may terminate the Merger Agreement.

The closing of the merger is subject to certain conditions, including (among
others) satisfactory completion by U.S. Filter of the due diligence during the
30-day period following the date of the agreement, expiration of the Hart-Scott-
Rodino waiting period, and approval by Unit shareholders.  The transaction is
expected to close in September, 1998.  Following the merger, Unit will become a
wholly-owned subsidiary within U.S. Filter's Kinetics Group ("USF Kinetics").

At the effective time (the "Effective Time"), all outstanding stock options and
warrants to purchase Unit stock shall automatically convert into an option to
purchase a number of shares of U.S. Filter common stock equal to (x) the number
of shares of Unit Common Stock issuable immediately as of the date of this
Agreement upon exercise of such Unit stock option or warrant multiplied by (y)
the Exchange Ratio with an exercise price equal to the exercise price which
existed under the corresponding Unit stock option or warrant divided by the
Exchange Ratio, and with such other terms and conditions, subject to U.S.
Filter's approval, as were in effect under such Unit stock option or warrant as
of the date of this Agreement.

Fractional shares will not be issued, but the pro rata portion of the net
proceeds of the sale of all such shares will be paid in cash to the persons
entitled thereto.  As a result of the conversion of the Unit Common Stock, the
Unit Common Stock will be de-listed from the Nasdaq National

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Market tier of The Nasdaq Stock Market and will not be listed on any national
securities exchange or quoted in any inter-dealer quotation system, and holders
of Unit Common Stock will become shareholders of U.S. Filter.

Additionally, if the Merger becomes effective, the directors and officers of
Subcorp, immediately prior to the Merger, will become the directors and officers
of the Surviving corporation.

The foregoing summary of the terms of the Merger Agreement does not purport to
be complete and is qualified in its entirety by reference to the full text of
the Merger Agreement.

On June 29, 1998, Unit issued a press release stating that it was in merger
discussions for the acquisition of the company, a copy of which is attached
hereto as Exhibit 99.1 and incorporated herein by reference.

On July 2, 1998, Unit issued a press release stating that it had signed a
definitive agreement regarding the Merger, a copy of which is attached hereto as
Exhibit 99.2 and incorporated herein by reference.



Item 7.  Financial Statements and Exhibits
         ---------------------------------

     (a) Financial statements of businesses acquired:  None

     (b) Pro forma financial information:   None

     (c) Exhibits:

         (3.1)   Merger Agreement, dated as of July 2, 1998, among United
                 States Filter Corporation, Kinetics Acquisition Corporation
                 and Unit Instruments, Inc.

         (99.1)  Text of Press Release issued by Unit Instruments, Inc. dated
                 June 29, 1998.

         (99.2)  Text of Press Release issued by Unit Instruments, Inc. dated
                 July 2, 1998.

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                                   SIGNATURES
                                        

Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.


                                          UNIT INSTRUMENTS, INC.
 


Date:  July 6, 1998                       By  /s/  GARY N. PATTEN
                                              ----------------------------
                                              /s/  Gary N. Patten
                                                   Chief Financial Officer

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                                 Exhibit Index
                                        


Exhibit 3.1:   Merger Agreement dated as of July 2, 1998, among United States
               Filter Corporation, Kinetics Acquisition Corporation and Unit
               Instruments, Inc.


Exhibit 99.1:  Text of Press Release issued by Unit Instruments, Inc. dated 
               June 29, 1998.


Exhibit 99.2:  Text of Press Release issued by Unit Instruments, Inc. dated
               July 2, 1998.

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