Check the listing for details. Backflow Preventer Watts LF719-QT-S Double Check Valve. Condition: New – Open box. Listed at 275.99 USD. Backflow Preventer Watts LF719-QT-S Double Check Valve. This 3/4 inch lead free double check valve backflow preventer assembly is designed to prevent the reverse flow of contaminated 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 at cross-connections identified as non-health hazard applications and from other contaminants found at the service line entrance. This compact design with separate access top entry for easy maintenance is approved with the arrow on the valve pointing in the direction of flow for horizontal and vertical installations. This assembly consists of a lead free cast copper silicon alloy body, quarter turn ball valves with tee handles, NPT end connections, lead free bronze strainer, screw driver slotted test cocks, two replaceable positive seating check valves, and reversible rubber seat discs. Features Reversible seat disc rubber, extends the check valve life Chloramine resistant elastomers Top mounted screwdriver slotted ball valve test cocks Lead free cast copper silicon alloy body construction Specifications Backflow Preventer TypeDouble Check Valve Assembly Body FinishCast Bronze Body MaterialLead Free Bronze Body PatternInline BrandWatts Buy American Act CompliantYES BypassNo Cap And TetherNo Disc MaterialSilicone EAN098268236781 Elbow FittingNo Hazard Protection LevelNon Health Hazard Hot And Harsh WaterNo Hydrant ConnectionNo Inlet Connection Size3/4 IN Inlet Connection TypeFemale Threaded Inlet Shutoff Valve TypeQuarter Turn Ball Valve Inlet Thread TypeNPT Lead FreeYES Maximum Temperature-Fahrenheit180 Maximum Working Pressure-BAR12.10 Maximum Working Pressure-PSI175 Meter TypeNo Meter Minimum Temperature - Celsius0.50 Minimum Temperature-Fahrenheit33 Outlet Connection Size3/4 IN Outlet Connection TypeFemale Threaded Outlet Shutoff Valve TypeQuarter Turn Ball Valve Outlet Thread TypeNPT Part Number0065308 Polymer CoatingNo Pressure OperationContinuous Protection TypeBackpressure and Backsiphonage Seat MaterialEngineered Plastic SeriesLF719 StrainerYes TradenameNone TypeKit