Air Admittance Valves

The purpose of an Air Admittance Valve (AAV) is to provide a method of allowing air to enter the plumbing drainage system without the use of a vent to prevent sewer gases from escaping into a building. An Air Admittance Valve is a one-way valve designed to allow air to enter the plumbing drainage system when negative pressures develops in the piping system. The device shall close by gravity and seal the vent terminal at zero differential pressure (no flow conditions) and under positive internal pressures. Each AAV is scientifically tested and designed never to fail.

*An Air Admittance Valve is not designed to relief positive pressure.
**Air Admittance Valves are not designed to function below -40°F or above 150°F

ASSE 1050 & 1051
NSF Standard
IAPMO – Classified Mark
ASTM D 2665/D 2661
International Plumbing Code (IPC) 2003
International Residential Code (IRC) 2003

Product Chart
Air Admittance ValvesAir Admittance Valve, ABS, 1-1/2" - 2", w/AdapterItem #: P-3702
  Item #:
Air Admittance ValvesAir Admittance Valve, PVC, 1-1/2" - 2", w/AdapterItem #: P-3703

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