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MIFAB® model M3-500-NPB pressure drop activated brass trap seal primer, with inlet opening of 1/2 in (13) male NPT and outlet opening of female 1/2 in (13) NPT complete with four view holes, adjustment screw for variable water delivery and removable filter screen. Serves up to 10 floor drain traps and has no air pre-charge.
MIFAB® M-500 Series M3-500-NPB Trap Seal Primer, 1/2 in Nominal, MNPT x FNPT