Victaulic® FireLock® Alarm Check Valve, Vertical, Series: 751, 3 in Nominal, Grooved, 300 psi Maximum, Specifications Met: ASTM A536, Grade 65-45-12, cULus Listed, Media: Water, 12.61 in Inlet to Outlet Length, 11-1/4 in Top to Inlet Center, Ductile Iron Body, EPDM/ASTM D2000 Clapper Seal/Nitrile Seat O-Ring Softgoods, 3-1/2 in OD x 23-1/2 in W