Air Admittance Valve Code

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This technical note has been developed as a guide to the western australian plumbing industry for the correct use and installation of air admittance valves (aavs) for sanitary and drainage plumbing work.

Air admittance valve code. (2) the air admittance valves shall be located, (a) above the flood level rim of the fixture it serves, One solution is an air admittance valve or aav. Air admittance valves as an alternate method of venting a plumbing fixture background:

Individual and branch air admittance valves shall be located not less than 4 inches (102 mm) above the horizontal branch drain or fixture drain being vented. Air admittance valves have been effectively used in europe for more than four decades and they have been used in mobile and manufacturer homes in the usa for the last thirty years or more. World leading air admittance valves studor aavs eliminate the need for passive pipe venting and costly roof penetrations with world leading performance by their unique and patented design.

The aav seems like an good approach but apparently its not code in a lot of places. The air admittance valve shall be installed a minimum of 6 inches (152 mm) above insulation materials where installed in attics. Please, please, please stop allowing these and maybe lowes and home depot will stop selling them.

Depending on the valve and the size of the vent, aavs can support one or multiple vent lines. Manufacturers offer warranties that range from 20 years to lifetime. Another concern with an air admittance valve is that it might leak if there is a sewage backup.

Other options for an air admittance valve besides underneath the sink? Then gravity closes the valve, keeping sewer gases out of the room. Pvc air admittance valve with 20 dfu branch and 8 dfu stack the purpose of an air admittance valve is the purpose of an air admittance valve is to provide a method of allowing air to enter the plumbing drainage system without the use of a vent extended to open air and to prevent sewer gases from escaping into a building.

Code approved, complies with the national plumbing code. An air admittance valve is a valve that is completely pressure activated. The air admittance valve shall be located within the maximum developed length permitted for.

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