Item - Check Valves Check Valve Flow Design Single Mechanism and Body Design Inline Disc Body Material - Valves PVC Pipe or Tube Size 1 1/2 in Connection Type FNPT x Socket Cracking Pressure 1.000 to 1.500 psi Mounting Orientation Horizontal Vertical Seal Material Viton Max Temp - Valves 140 Degrees F Min Temp - Valves 32 Degrees F Max Water Pressure - Valves 100 psi @ 75 Degrees F Max Steam Pressure - Valves Not Rated Seat Material Viton Spring Material PFA