IAPMO PS 072-2019 Valves with Atmospheric Vacuum Breakers

1 Scope
1.1 General
1.1.1 This Standard covers valves with atmospheric vacuum breakers and specifies requirements for materials, physical characteristics, performance testing, and markings.
1.1.2 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, backflow assemblies and devices shall be protected from  freezing by a method acceptable to the Administrative Authority.