Watts 405NRS FLGXGRV 8 Part of the 405 NRS RW Series roof hatch finder This 1 inch lead free This 1 inch lead free automatic reseating temperature and pressure relief valve with a 9 inch thermostat is installed directly in tank tappings and is used in commercial applications to provide automatic temperature and pressure protection for hot water supply tanks and hot water heaters Specifications Body Material Iron Brand Watts EAN 098268587395 Inlet Connection Size 1 1 2 IN Inlet Connection Type Female Threaded Inlet Thread Type NPTF Lead Free Not In Scope Maximum Working Pressure PSI 40 Outlet Connection Size 2 IN Outlet Connection Type Female Threaded Outlet Thread Type NPTF Part Number F383792 Pressure Range Does Not Apply to Product Pressure Relief Setting PSI 50 Series 740 Specification Sheet 174A Flange x groove connections ductile iron body