Topical Terminology > Air Admittance Valve (Aav)
1 Definition
Air Admittance Valve (AAV)
For Air Admittance Valve (AAV) we have a term and definition in Plumbing.
Air Admittance Valve (Aav) (Plumbing) 
A device that replaces a traditional vent to allow air to enter the pipe and equalize pressure, preserving the seal of water in the fixture trap.
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