Meanings
plural air admittance vents
- businessa mechanical sewer vent that allows air to enter into the sewage system but does not allow exhaust of sewer gases, to aid the flow of sewage by providing air behind water, where a standard vent stack to atmosphere is not possible, by drawing in interior air but keeping harmful sewer gases contained.
Synonyms: AAV, mechanical vent, mechanical waste vent, mechanical sewer vent
Synonyms & antonyms
nouna mechanical sewer vent that allows air to enter into the sewage system but does not allow exhaust of sewer gases, to aid the flow of sewage by providing air behind water, where a standard vent stack to atmosphere is not possible, by drawing in interior air but keeping harmful sewer gases contained.
Cite this entry
air admittance vent. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/air%20admittance%20vent
“air admittance vent.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/air%20admittance%20vent. Accessed November 5, 2026.
WatkinsX Dictionary, s.v. “air admittance vent,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/air%20admittance%20vent.
Source: air admittance vent on Wiktionary, CC BY-SA 4.0.