Wafer Check Valve Material of Construction PVC Size 2-1/2 In. Connection Type Flanged Length 2-19/64 In. Width 4-3/4 In. Overall Height 6 In. Max Water Pressure 150 psi @ 70 Degrees F Cracking Pressure 1 psi Max Temp 140 Degrees F Mounting Position Vertical or Horizontal Seat Material FPM Spring Material 316 Stainless Steel Seal Material FPM Flow 155 gpm