Item – Check Valves Check Valve, Flow Design Single, Mechanism and Body Design Inline Wafer, Body Material – Valves Ductile Iron, Pipe or Tube Size 4 1/2 in, Connection Type Flanged Wafer x Flanged Wafer, Cracking Pressure 500 psi, Mounting Orientation Horizontal, Seal Material EPDM, Max. Temp. – Valves 230 Degrees F, Min. Temp. – Valves -40 Degrees F, Max. Water Pressure – Valves 300 psi, Seat Material 304 Stainless Steel, Spring Material 304 Stainless Steel, Flow – Valves 700 gpm