Watts 957Z-NRS-FS 4 - Part of the 957 Series R304 Detectable Warning Surfaces This 1/2 inch anti-siphon vacuum

This 1/2 inch anti-siphon vacuum breaker backflow preventer for hot or cold water prevents the reverse flow of polluted water from entering into the potable water supply due to backsiphonage

four retaining bolts

50 Minimum Temperature-Fahrenheit 33 Outlet Connection Size 1 1/4 IN Outlet Connection Type Male Threaded Outlet Shutoff Valve Type Quarter Turn Ball Valve Outlet Thread Type NPT Part Number F122765 Polymer Coating No Pressure Operation Continuous Protection Type Backpressure and Backsiphonage Seat Material Engineered Plastic Series LF909 Small Strainer Yes Technologies Flood Detection Tradename None Specification Sheet - Flood Sensor Connection Kit - Watts

at the entrance to escalators and other places where there is either vehicle traffic or an elevation change that could pose a danger

This 3 inch two-piece full port ball valve with female threaded end connections is used in commercial and industrial applications with high operating temperature and pressure limits

Watts 957Z-NRS-FS 4 - Part of the 957 Series R304 Detectable Warning Surfaces This 1/2 inch anti-siphon vacuumThis 4 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 Z pattern 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