Victaulic® FireLock® Check Valve, Series: 717, 6 in Nominal, Grooved, 365 psi Maximum, Specifications Met: ASTM A536, Grade 65-45-12, cULus Listed, 11-1/2 in Inlet to Outlet Length, 5 in Top to Inlet Center, Ductile Iron Body, Black Painted, 6-5/8 in OD