Item – Check Valves Check Valve, Flow Design Single, Mechanism and Body Design Inline Piston, Body Material – Valves Brass, Pipe or Tube Size 1/8 in, Connection Type MNPT x FNPT, Cracking Pressure 1 psi, Mounting Orientation Horizontal, Vertical, Seal Material Buna-N, Max. Temp. – Valves 180 Degrees F, Min. Temp. – Valves -20 Degrees F, Max. Water Pressure – Valves 500 psi, Max. Steam Pressure – Valves Not Rated, Seat Material Brass, Spring Material Stainless Steel, Full Flow – Valves Yes