Victaulic® FireLock® Alarm Check Valve, Vertical, Series: 751, 6 in Nominal, Grooved, 300 psi Maximum, Specifications Met: ASTM A536, Grade 65-45-12, cULus Listed, Media: Water, 16 in Inlet to Outlet Length, 14-1/4 in Top to Inlet Center, Ductile Iron Body, EPDM/ASTM D2000 Clapper Seal/Nitrile Seat O-Ring Softgoods, 6.625 in OD x 30.11 in W