atmospheric-vacuum-breaker
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atmospheric vacuum breaker
Standards
see backflow prevention device
Source - AS/NZS 3500.0:2003: Plumbing and drainage
Standards
a device to prevent backflow caused by back siphonage, which incorporates a ventilation valve, which operates automatically to admit air into the downstream chamber of the valve whenever the pressure in the chamber reduces to or falls below atmospheric pressure
Source - AS/NZS 3500.0:2003: Plumbing and drainage
HB50
device to prevent backflow caused by back siphonage, which incorporates a ventilation valve, which operates automatically to admit air into the downstream chamber of the valve whenever the pressure in the chamber reduces to or falls below atmospheric pressure
HB50
atmospheric vacuum breaker