Item - Check Valves Check Valve Flow Design Single Mechanism and Body Design Inline Spring with Tap Body Material - Valves Brass Pipe or Tube Size 1 1/4 in Connection Type FNPT x FNPT Cracking Pressure 0.5 psi Mounting Orientation Horizontal Vertical Seal Material NBR Max Temp - Valves 158 Degrees F Min Temp - Valves 35 Degrees F Max Water Pressure - Valves 200 psi Max Steam Pressure - Valves Not Rated Seat Material Bronze Spring Material Stainless Steel