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1. A pipe installed to provide a flow of air to or from a drainage system or to provide a circulation of air within such system to protect trap seals from siphonage and back pressure.
2. A Vent connector.
3. A Vent system.
4. AVentilator, 3.
5. A stack designed to allow moisture vapor or other gas from inside a building or building system to escape into the atmosphere.
6.See cavity vent.