M-500 Pressure Drop Trap Seal Primer (Up to 6 Drains)


The MIFAB® MR-500 Series pressure drop activated brass trap seal primer, with inlet opening of 1/2″ male N.P.T. and outlet opening of female 1/2″ N.PT. Complete with four view holes and removable filter screen. Requires no adjustments and no air pre-charge. MIFAB’s Series of pressure activated trap seal primers (MR-500, M1-500 and M2-500) can be connected to any cold water line and will be automatically activated when a valve or faucet, that is on the line, is opened.

Pictured: M1-500-NPB


Trap Seal Primer Type Pressure Drop
Series MR-500
SKU MR-500-NPB, M1-500-NPB, M2-500-NPB
Function Listed with I.A.P.M.O. and C.S.A. and are tested and certified to the A.S.S.E. Standard 1018 and are so marked. U.S. Patent # 6,152,164.