WWF121508 (Watts) | 1 LF174A 150 FS | Relief Valves | 1 x 1This Lead Free Pressure Relief Valve Has a 1 Inch Nptf Female Inlet And Outlet And a 150 psi Pressure Relief Setpoint. This Valve Can be Used For Hot Water Space Heating Boiler Applications to Protect Against Excessive Pressure. It Features a Lead Free Copper Silicon Alloy Body , Non Metallic Disc To Metal Seating, And Test Lever. Includes a Nonrestrictive Discharge Drain Line Flood Sensor With Sentryplus Alert(R) Technology to Detect Excessive Water