Silent Check Valve, Material of Construction Clear PVC, Size 1-1/2 In., Connection Type Slip x Slip, Length 3-1/4 In., Width 3-1/4 In., Overall Height 9 In., Max. Water Pressure 150 psi @ 72 Degrees F, Cracking Pressure 300 psi, Max. Temp. 120 Degrees F, Mounting Position Any, Seat Material PVC, Spring Material 316 Stainless Steel, Seal Material Buna N, Flow 100 gpm