Item - Check Valves Check Valve Flow Design Single Mechanism and Body Design Inline Silent Body Material - Valves PVC Pipe or Tube Size 2 in Connection Type Slip x Slip Cracking Pressure 0.5 psi Mounting Orientation Horizontal Vertical Seal Material Buna-N Max Temp - Valves 120 Degrees F Min Temp - Valves 35 Degrees F Max Water Pressure - Valves 150 psi @ 72 Degrees F Max Steam Pressure - Valves Not Rated Seat Material PVC Spring Material 316 Stainless Steel