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ASSE Standard #1001-2021 (Download)

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ASSE 1001-2021
Performance Requirements for Atmospheric Type Vacuum Breakers

ANSI Approved: November 2021

ASSE 1001-2021 applies to atmospheric type vacuum breakers (herein referred to as the "device") that are single pipe-applied, flushometer-applied, or integrally-applied (does not apply to water closet tank ballcocks or similar devices that depend on float-operated valves to control flow). The purpose of these devices is to provide protection of the potable water supply against pollutants or contaminants that enter the system due to backsiphonage through the outlet. Under backsiphonage conditions, a small amount of water is permitted to exit through the air ports.

Products downloaded are not to be reproduced or distributed in any way.

A hard copy version of this standard is also available. 

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