Watts LF957NRPDA DOSY CFM FS 6 Part of the LF957RPDA Series roof hatch finder 50 Minimum Temperature Fahrenheit 33 Outlet 50 Minimum Temperature Fahrenheit 33 Outlet Connection Size 6 IN Outlet Connection Type Grooved Joint Outlet Shutoff Valve Type Gear Operated Butterfly Valve Outlet Thread Type Does Not Apply To Product Part Number F111787 Polymer Coating No Pressure Operation Continuous Protection Type Backpressure and Backsiphonage Seat Material Engineered Plastic Series 957 Strainer No Technologies Flood Detection Tradename None Specification Sheet 957 This product is Made in America Features Features a flood sensor with SentryPlus Alert technology to detect excessive water discharges from the relief valve The add on sensor connection kit is available for building management systems and cellular communication