This 6 Inch Reduced Pressure Zone Assembly Backflow Preventer Help Stop The Reverse Flow of Liquids Due to Backpressure or Backsiphonage, Where Potential Health Hazard Exists. This Extremely Compact And Lighter Than a Traditional Designed Assembly is Approved For Horizontal Installation as Long as The Backflow Assembly is Installed in Accordance With The Direction of The Flow Arrow. This Assembly Consists of a Stainless Steel Body With a Quick Access Sleeve, Torsion Spring Check Valves, Grooved Gear Operated Butterfly Valves With Tamper Switch, Test Cocks, And a Corrosive Resistant Stainless Steel Bottom Mounted Pressure Relief Valve. This Backflow Assembly Contains an Integrated Flood Sensor With Sentryplus Alert® Technology to Detect Excessive Water Discharges From The Relief Valve. When Activated Through an Add-On Sensor Connection Kit, The Flood Sensor Relays a Signal That Triggers Notification of Potential Flooding to Service Personnel. The Add-On Sensor Connection Kit is Available For Building Management Systems And Cellular Communication. | Watts | F111789