Item - Check Valves Check Valve, Flow Design Single, Mechanism and Body Design Inline Swing, Body Material - Valves PVC, Pipe or Tube Size 1 in, Connection Type FNPT x FNPT, Cracking Pressure 0.25 psi, Mounting Orientation Horizontal, Vertical, Seal Material EPDM, Max. Temp. - Valves 140 Degrees F, Min. Temp. - Valves 14 Degrees F, Max. Water Pressure - Valves 150 psi @ 70 Degrees F, Max. Steam Pressure - Valves Not Rated, Seat Material PVC, Flow - Valves 20.2 gpm, Full Flow - Valves Yes