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IAPMO PS 72-2019
Valves with atmospheric vacuum breakers
This standard establishes an acceptable protocol for verification of performance and materials toxicity requirements for valves incorporating an atmospheric vacuum breaker device (Valve). Valves covered by this standard are intended for cold water installations requiring an integral anti-siphon device to prevent house water contamination when installed per the manufacturer's instructions. In cold climate areas, back flow assemblies and devices shall be protected from freezing by a method acceptable to the Administrative Authority.
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International Association of Plumbing and Mechanical Officials [iapmo]
International Association of Plumbing and Mechanical Officials [iapmo]