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ASSE 1019-2011 (R2016)

Performance Requirements for Wall Hydrant with Backflow Protection and Freeze Resistance

These devices shall have a permanent means to protect against backflow due to either backsiphonage or backpressure. The backflow protection shall include a minimum of two (2) mechanisms: an air inlet for preventing backsiphonage and a check valve for preventing backpressure backflow. These devices are terminal fittings that supply potable water to hose connections without danger of freezing.

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American Society of Sanitary Engineering [asse-sanitary]

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