Air admittance valve definition

Air admittance valve or “AAV” means a device designed to allow air to enter the drainage system to balance the pressure and prevent siphonage of the water trap when negative pressure develops in the system.

Examples of Air admittance valve in a sentence

  • Air admittance valve are only allowed when approved by the Building Official.

  • Follow Us OnTechnical Data SheetProduct: DEKS AAV50-40: Air admittance valve 50 – 40 mm.Purpose: The product is fitted to a plumbing system which allows air to enter the piping system, but not allowing air or gases out.

  • Chapter 9, Section 917.2 entitled "Air admittance valves (installation) is amended by adding the following: Air admittance valve locations shall be shown on the plans.

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