Watts 740 075 FS 1 1 2 Part of the 740 Series Basement Window Well Specifications Buy American Act Compliant Specifications Buy American Act Compliant NO Compatible Series or Model 709DCDA Compatible Size Used On 4 IN Kit Contents Disc and Cover O ring Kit Type Rubber Parts Kit Lead Free YES Product Group BACKFLOW KITS UPC 098268399400 This unit is threaded at the inlet for easy connection to the underground supply and threaded on the building side for easy connection to either the overhead fire sprinkler system or potable water supply Includes a nonrestrictive discharge drain line flood sensor with SentryPlus Alert® technology to detect excessive water discharges from the relief valve and pressure relief setpoint of 75 psi