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Air admittance valves (AAVs, or commonly referred to in the UK as Durgo valves and in the US as Studor vents and Sure-Vent®) are negative-pressure-activated, one-way mechanical valves, used in a plumbing or drainage venting system to eliminate the need for conventional pipe venting and roof penetrations.
The "Venting to atmosphere" section is great! Of course, diagrams and picutres would make it even better... But the "Air admittance valve" section does not make sense -- if it only allows gases in, not out, how does it prevent back-pressure when a toilet flushes?69.87.193.156 13:05, 6 September 2006 (UTC) It doesn't.
Retrieved from "https://en.wikipedia.org/w/index.php?title=Air_admittance_valve&oldid=309883018"
The Air Movement and Control Association International, Inc. (AMCA) is an international trade body that sets standards for Heating, Ventilation and Air Conditioning equipment. It rates fan balance and vibration, aerodynamic performance, air density, speed and efficiency.
Air admittance valve, a valve in a drain-waste-vent system; Aire d'attraction d'une ville, a metropolitan statistical area used by the French national statistics office INSEE; Another Angry Voice, a British political blog; Vatican Apostolic Archive, Latin: Archivum Apostolicum Vaticanum
Honeywell HPA300 $ at Amazon. Honeywell HPA300 $ at Best Buy. Honeywell HPA300 $ at Walmart. This air purifier is fit for a larger space than most other options, but at a lower price.
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