Item - Check Valves Check Valve, Flow Design Single, Mechanism and Body Design Inline Spring, Body Material - Valves Acetal Resin Copolymer, Pipe or Tube Size 5/16 in, Connection Type Push x Push, Cracking Pressure 0.3 psi, Mounting Orientation Horizontal, Vertical, Seal Material EPDM, Max. Temp. - Valves 150 Degrees F, Min. Temp. - Valves 33 Degrees F, Max. Water Pressure - Valves 150 psi, Max. Steam Pressure - Valves Not Rated, Seat Material EPDM, Spring Material Stainless Steel