Watts RA 1 AP 1 Part of the RA 1 AP Series Window Well Extension and the pressure relief is and the pressure relief is 90 psi (10 drop the dig guard in the trench and then attach to the bottom of the fence with screws and washers (not included) UPC 098268394887 Specifications Body Material Bronze Body Pattern Angle Brand Watts Buy American Act Compliant NO EAN 098268394887 Hydronic Item Type Radiator Supply Valve Inlet Connection Size 1 IN Inlet Connection Size Metric 25 MM Inlet Connection Type Female Threaded Inlet Thread Type IPS Lead Free NO Maximum Steam Pressure PSI 15 Maximum Water Pressure PSI 60 Outlet Connection Size 1 IN Outlet Connection Type Union Joint Outlet Thread Type Does Not Apply To Product Part Number 0067452 Series RA 1 AP Specification Sheet RA 1 AP