Item - Check Valves Check Valve Flow Design Single Mechanism and Body Design Y True Union Body Material - Valves PVC Pipe or Tube Size 1 in Connection Type FNPT x FNPT Cracking Pressure 1 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 EPDM Flow - Valves 9 gpm Full Flow - Valves Yes