Item - Check Valves Check Valve Flow Design Single Mechanism and Body Design Inline Ball Cone Body Material - Valves Glass Filled Polypropylene Pipe or Tube Size 3/8 in Connection Type FNPT x FNPT Cracking Pressure 0.33 psi Mounting Orientation Horizontal Vertical Seal Material Viton Max Temp - Valves 140 Degrees F Min Temp - Valves -20 Degrees F Max Water Pressure - Valves 125 psi Max Steam Pressure - Valves Not Rated Seat Material Glass Filled Polypropylene