Watts 909RPDA DOSY GPM FS 8 Part of the 909RPDA Series oscp cast iron ADA pads This 8 inch reduced pressure This 8 inch reduced pressure zone assembly backflow preventer helps prevent the reverse flow of fire protection substances and water of non potable quality from being pumped or siphoned into the potable water supply due to backsiphonage and or backpressure in accordance with national plumbing codes and water authority requirements steam heating boilers and process equipment used in industrial and commercial applications Cast iron body construction with patented 3 part advanced epoxy coating system designed to limit both microbial induced (MIC) and exposed metal substrate corrosion 50 Minimum Temperature Fahrenheit 33 Outlet Connection Size 8 IN Outlet Connection Type Mechanical Joint Outlet Shutoff Valve Type Outside Stem And Yoke Gate Valve Outlet Thread Type Does Not Apply To Product Part Number 88009361 Polymer Coating No Pressure Operation Continuous Protection Type Backpressure and Backsiphonage Seat Material Stainless Steel Series 909RPDA Strainer No Technologies Flood Detection Tradename None Specification Sheet 909RPDA