88009317 (Watts) | 10 Inch | Cast Iron Reduced Pressure Zone Backflow Preventer Assembly | Osy Shutoff | Armortek Coating | Backflow Flood SensorThis 10 Inch Lead Free Reduced Pressure Zone Backflow Preventer Assembly Prevents The Reverse Flow of Polluted Water From Entering Into The Potable Water Supply Due to Backsiphonage And or Backpressure. It is Ideal For Protection in Continuous Pressure Piping Applications And at Cross Connections Identified as Health Hazards. This Assembly Consists of an Epoxy Coated Cast Iron Body, Outside Stem And Yoke Resilient Seated Gate Valves, Captured Spring