Watts LF40XL 7 150 210 FS 1 Part of the LF40L Series chat hdpe unit ventilators unit ventilators Specifications Body Material Iron Brand Watts EAN 098268584998 Inlet Connection Size 1 IN Inlet Connection Type Female Threaded Inlet Thread Type NPTF Lead Free Not In Scope Maximum Working Pressure PSI 20 Outlet Connection Size 1 1 4 IN Outlet Connection Type Female Threaded Outlet Thread Type NPTF Part Number F382570 Pressure Range Does Not Apply to Product Pressure Relief Setting PSI 30 Series 740 Specification Sheet 174A pressure relief setpoint of 150 psi The valve can be installed in hot water outlet within the allowable distance from the top of the tank for commercial applications to provide protection for hot water supply tanks and hot water heaters