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- Atmospheric_vacuum_breaker abstract "An Atmospheric Vacuum Breaker (AVB) is a backflow prevention device used in plumbing to prevent backflow of non-potable liquids into the drinking water system. It is usually constructed of brass and resembles a 90-degree elbow with a hood on its top to allow air to enter the water system if a siphon attempts to form. Inside this elbow is a poppet valve that is held \"up\" by the water pressure found in the system, closing the air entrance to the device. If the pressure in the \"upstream side\" is reduced to atmospheric pressure or below, the poppet valve drops and allows air to enter the system, breaking the siphon.These devices, since they work on atmospheric principles, cannot be installed in an enclosure containing air contaminants. Those contaminants could be drawn into the device, thus fouling the pipes. AVBs must be installed a minimum of 6 inches above the highest usage point in the system (i.e. sprinkler, drip emitter, etc.) Underground installation of AVBs is entirely ineffectual in providing backflow protection as groundwater in the underground vault could be drawn into the water system, contaminating it.The AVB can be used in high hazard situations but not with continuous pressure, as the poppet would likely stick and the AVB would no longer function properly. A shutoff valve should never be placed downstream of any AVB, as this would result in continuous pressure on the AVB. The AVB is not a testable device.".
- Atmospheric_vacuum_breaker thumbnail AVB-1.JPG?width=300.
- Atmospheric_vacuum_breaker wikiPageID "2331620".
- Atmospheric_vacuum_breaker wikiPageLength "1960".
- Atmospheric_vacuum_breaker wikiPageOutDegree "19".
- Atmospheric_vacuum_breaker wikiPageRevisionID "646447117".
- Atmospheric_vacuum_breaker wikiPageWikiLink Air_gap_(plumbing).
- Atmospheric_vacuum_breaker wikiPageWikiLink Air_pollution.
- Atmospheric_vacuum_breaker wikiPageWikiLink Atmosphere_of_Earth.
- Atmospheric_vacuum_breaker wikiPageWikiLink Backflow_prevention_device.
- Atmospheric_vacuum_breaker wikiPageWikiLink Brass.
- Atmospheric_vacuum_breaker wikiPageWikiLink Category:Irrigation.
- Atmospheric_vacuum_breaker wikiPageWikiLink Category:Plumbing_valves.
- Atmospheric_vacuum_breaker wikiPageWikiLink Chemigation_valve.
- Atmospheric_vacuum_breaker wikiPageWikiLink Double_check_valve.
- Atmospheric_vacuum_breaker wikiPageWikiLink Drinking_water.
- Atmospheric_vacuum_breaker wikiPageWikiLink File:AVB-1.JPG.
- Atmospheric_vacuum_breaker wikiPageWikiLink Hydrostatic_loop.
- Atmospheric_vacuum_breaker wikiPageWikiLink Liquid.
- Atmospheric_vacuum_breaker wikiPageWikiLink Plumbing.
- Atmospheric_vacuum_breaker wikiPageWikiLink Poppet_valve.
- Atmospheric_vacuum_breaker wikiPageWikiLink Pressure_vacuum_breaker.
- Atmospheric_vacuum_breaker wikiPageWikiLink Reduced_pressure_zone_device.
- Atmospheric_vacuum_breaker wikiPageWikiLink Siphon.
- Atmospheric_vacuum_breaker wikiPageWikiLink Water_pipe.
- Atmospheric_vacuum_breaker wikiPageWikiLinkText "Atmospheric vacuum breaker".
- Atmospheric_vacuum_breaker wikiPageWikiLinkText "atmospheric vacuum breaker".
- Atmospheric_vacuum_breaker wikiPageUsesTemplate Template:Backflow.
- Atmospheric_vacuum_breaker wikiPageUsesTemplate Template:Unreferenced.
- Atmospheric_vacuum_breaker subject Category:Irrigation.
- Atmospheric_vacuum_breaker subject Category:Plumbing_valves.
- Atmospheric_vacuum_breaker hypernym Device.
- Atmospheric_vacuum_breaker type Device.
- Atmospheric_vacuum_breaker comment "An Atmospheric Vacuum Breaker (AVB) is a backflow prevention device used in plumbing to prevent backflow of non-potable liquids into the drinking water system. It is usually constructed of brass and resembles a 90-degree elbow with a hood on its top to allow air to enter the water system if a siphon attempts to form. Inside this elbow is a poppet valve that is held \"up\" by the water pressure found in the system, closing the air entrance to the device.".
- Atmospheric_vacuum_breaker label "Atmospheric vacuum breaker".
- Atmospheric_vacuum_breaker sameAs Q4817124.
- Atmospheric_vacuum_breaker sameAs m.074by_.
- Atmospheric_vacuum_breaker sameAs Q4817124.
- Atmospheric_vacuum_breaker wasDerivedFrom Atmospheric_vacuum_breaker?oldid=646447117.
- Atmospheric_vacuum_breaker depiction AVB-1.JPG.
- Atmospheric_vacuum_breaker isPrimaryTopicOf Atmospheric_vacuum_breaker.