Check Valves Check Valve, Flow Design Single, Mechanism and Body Design Inline Swing, Body Material - Valves Brass, Pipe or Tube Size - Check Valves 1/2 in, Connection Type - Check Valves FNPT x FNPT, Cracking Pressure - Check Valves 0.725 psi, Mounting Orientation - Check Valves Horizontal, Seal Material - Check Valves Brass, Max. Temp. - Valves 212 Degrees F, Min. Temp. - Valves 32 Degrees F, Max. Water Pressure - Valves 200 psi @ 73 Degrees F, Max. Steam Pressure - Valves 120 psi WSP