MIFAB® Trap Seal Primer, Series: M-500, 1/2 in Pipe, 4-1/8 in Length, MNPT x FNPT, For Use With: Cold Water Line, Brass, 1-1/4 in Dia

MIFAB® model M1-500-NPB pressure drop activated brass trap seal primer, with inlet opening of 1/2 in (13) MNPT and outlet opening of female 1/2 in (13) NPT Complete with four view holes and removable filter screen. Serves up to 10 floor drain traps and requires no adjustments and no air pre-charge.