Apollo™, 6WC100N1, Check Valve, Wafer, Series: 6WC, 3 in Nominal, Flanged End Style, 250 psi Pressure, 125 lb Pressure Class, 180 deg F, 191 gpm Flow Rate, Cast Iron Body, 316 Stainless Steel/Aluminum Bronze/Buna-N (Nitrile) Seat Ring Trim, Epoxy Coated, 5.25 in Dia x 2.62 in H Dimensions