Atmospheric vacuum breaker definition

Atmospheric vacuum breaker means a device, which prevents backsiphonage by creating an atmospheric vent when there is either a negative pressure or sub-atmospheric pressure in the water system.

Atmospheric vacuum breaker means a device designed to admit atmospheric pressure into a piping system whenever a vacuum is caused on the upstream side of the receptacle.

Atmospheric vacuum breaker or "AVB" means a non-testable device consisting of an air inlet valve or float check, a check seat and an air inlet port(s). This device is designed to protect against a non-health hazard or a health hazard under a backsiphonage condition only. Product and material approval is under the Oregon Plumbing Specialty Code.

Examples of Atmospheric vacuum breaker in a sentence

• Atmospheric vacuum breaker designs and principle of operation during vacuum condition.‌‌ Installation Atmospheric vacuum breakers must not be installed where they would be subjected to backpressure such as feeds to boilers, elevated tanks, or pumps.

• Atmospheric vacuum breaker backsiphonage prevention assemblies must be inspected at intervals not exceeding one (1) year to ensure proper operation of the air inlet valve.

• Atmospheric vacuum breaker backsiphonage prevention assemblies must be installed at a location that allows access to the device for maintenance and testing from floor or ground level, without use of a ladder or other similar apparatus, and that will not subject the device to flooding, excessive heat, or freezing.

• Atmospheric vacuum breaker – A backflow prevention device which is operated by atmospheric pressure in combination with the force of gravity.

• Atmospheric vacuum breaker: a device which prevents backsiphonage by creating an atomospheric vent when there is either a negative pressure or subatomosphereic pressure in the water system.

More Definitions of Atmospheric vacuum breaker

Atmospheric vacuum breaker means a mechanical device that automatically air vents a pipeline to prevent backsiphonage;

Atmospheric vacuum breaker means a device which prevents back-siphonage by creating an atmospheric vent when there is either a negative pressure a sub-atmospheric pressure in the water system.

Atmospheric vacuum breaker means a mechanical device not used under continued pressure, which automatically vents air from a pipeline to prevent back siphonage.

Atmospheric vacuum breaker means a mechanical device which automatically air vents a pipeline to prevent backsiphonage;

Atmospheric vacuum breaker means an assembly containing an air inlet valve, a check seat and an air inlet port(s). The flow of water into the body causes the air inlet valve to close the air inlet port(s). When the flow of water stops the air inlet valve falls and forms a check valve against backsiphonage. At the same time it opens the air inlet port(s) allowing air to enter and satisfy the vacuum. A shutoff valve immediately upstream may be an integral part of the assembly, but the assembly shall not be subjected to operating pressure for more than twelve(12) hours in any twenty-four (24) hour period. An atmospheric vacuumbreaker is designed to protect against a non-health hazard (i.e., pollutant) or a health hazard (i.e., contaminant) under a backsiphonage condition only.

Atmospheric vacuum breaker means a device which prevents back- siphonage by creating an atmospheric vent when there is either a negative pressure or subatmospheric pressure in the water system.

Atmospheric vacuum breaker means a mechanical device which automatically air vents a pipeline to prevent backsiphonage. Installation shall be located beyond the last control valve prior to the first outlet and at an elevation higher than any outlet according to the manufacturer’s instructions. Atmospheric vacuum breakers shall be installed so as not be to subjected to backpressure or continuous operating pressure of more than twelve (12) hours duration. Where vacuum breakers may be installed and a continuous operating pressure exists a pressure vacuum breaker shall be used.