Item – Check Valves Check Valve, Flow Design Single, Mechanism and Body Design Y, Body Material – Valves PVC, Pipe or Tube Size 4 in, Connection Type Flange x Flange, Cracking Pressure 1 psi, Mounting Orientation Horizontal, Vertical, Seal Material FPM, Max. Temp. – Valves 140 Degrees F, Min. Temp. – Valves 40 Degrees F, Max. Water Pressure – Valves 150 psi @ 70 Degrees F, Max. Steam Pressure – Valves Not Rated, Seat Material FPM, Flow – Valves 240 gpm, Full Flow – Valves Yes