0690992 (Ames-Deringer) | 3 Inch | SS Reduced Pressure Detector Backflow Preventer Assembly | Less Shutoff | Cam-Check Valves | Cubic Feet MeterThis 3 Inch Reduced Pressure Zone Backflow Preventer Assembly is Designed to 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. It is Ideal For Protection in Continuous Pressure Piping Applications And at Cross Connections Identified as