Apollo™, 6WC10AE1, Check Valve, Wafer, Series: 6WC, 4 in Nominal, 200 psi Pressure, 125 lb Pressure Class, -20 to 180 deg F, 377 gpm Flow Rate, Cast Iron Body, 316 Stainless Steel/Aluminum Bronze/Buna-N (Nitrile) Seat Ring Trim, Epoxy Coated, 6.75 in Dia x 2.62 in H Dimensions