Item - Check Valves Check Valve Flow Design Single Mechanism and Body Design Inline Disc Body Material - Valves PVC Pipe or Tube Size 1/4 in Connection Type FNPT x FNPT Cracking Pressure 0.5 psi Mounting Orientation Horizontal Vertical Seal Material Viton Max Temp - Valves 140 Degrees F Min Temp - Valves 32 Degrees F Max Water Pressure - Valves 150 psi @ 77 Degrees F Max Steam Pressure - Valves Not Rated Seat Material Viton Flow - Valves 2 gpm Full Flow - Valves No