Item - Check Valves Check Valve Flow Design Single Mechanism and Body Design Y Spring Body Material - Valves PVC Pipe or Tube Size 4 in Connection Type Socket x Socket Cracking Pressure 2.000 to 15.000 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 Spring Material Stainless Steel