Item - Check Valves Check Valve Flow Design Single Mechanism and Body Design Inline Spring Body Material - Valves PVC Pipe or Tube Size 1 in Connection Type FNPT x FNPT Cracking Pressure 2 psi Mounting Orientation Horizontal Vertical Seal Material EPDM Max Temp - Valves 140 Degrees F Min Temp - Valves 40 Degrees F Max Water Pressure - Valves 150 psi @ 70 Degrees F Max Steam Pressure - Valves Not Rated Seat Material PVC Spring Material Stainless Steel Flow - Valves 15 gpm