Exhibit 10(i)
                                                                   June 26, 2000




Mr. Gary J. Morgan
c/o Met-Pro Corporation
160 Cassell Road
Harleysville, PA 19438

Dear Mr. Morgan:

Reference is made to the definition of "Change of Control" found in Section 1(a)
of the Key Employee  Severance  Agreement that you executed on July 6, 1999 with
Met-Pro  Corporation.  With this  letter  agreement,  we hereby  amend  this Key
Employee  Severance  Agreement by deleting Section 1(a) thereof and replacing it
with the following:

"(a) Change of Control.  For purposes of this  Agreement,  a "Change of Control"
shall be deemed to have occurred:

        (i)     If any "person" or "group of persons",  which person or group of
                persons  are not part of  present  Management  and are acting in
                concert  (as the term  "person"  is used in  Sections  13(d) and
                14(d) of the  Securities  Exchange Act of 1934,  as amended (the
                "Act") becomes the "beneficial  owner" (as defined in Rule 13d-3
                promulgated  under the Act) directly or indirectly of securities
                of the Corporation  representing thirty (30%) percent or more of
                the combined voting power of the Corporation's  then outstanding
                securities; or,

        (ii)    Of at any time there shall be a change in the composition of the
                Corporation's Board of Directors resulting in a majority of such
                Directors  as of the date hereof no longer  constituting  such a
                majority;   provided,   however,   that  in   making   any  such
                determination  as to  change  in  composition,  there  shall  be
                excluded  any change  where the new  Director  was elected by or
                upon the recommendation of such present majority; or

        (iii)   If the  approval by the  stockholders  of the  Corporation  of a
                reorganization,  merger or  consolidation,  in each  case,  with
                respect  to  which   persons  who  were   stockholders   of  the
                Corporation immediately prior to such reorganization,  merger or
                consolidation  do not,  immediately  thereafter,  own more  than
                fifty  (50%)  percent  of  the  combined  voting  power  of  the
                reorganized,   merged   or   consolidated   Corporation's   then
                outstanding   securities  entitled  to  vote  generally  in  the
                election

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                of directors or with respect to a liquidation  or dissolution of
                the Corporation or the sale of all or  substantially  all of the
                Corporation's assets; or,

        (iv)    There  shall be a Change  of  Control  as  defined  by any other
                agreement or plan to which the Corporation is party."

Except as set forth in this  letter  agreement,  there are no other  changes  or
amendments to the Key Employee Severance Agreement,  which remains in full force
and effect.

                                                     Very truly yours,

                                                     MET-PRO CORPORATION



                                                By:   /s/  William L. Kacin
                                                    ----------------------------
                                                    William L. Kacin
                                                    Chairman and President

ACCEPTED AND AGREED:



 /s/ Gary J. Morgan
-----------------------------------
Gary J. Morgan