Is an air admittance valve legal?

Air admittance valves are approved by the International Residential Code (IRC), which is used in most areas of the country with only minor modifications, but not code approved in a few jurisdictions.

Where can air admittance valves be used?

Air Admittance Valves (aka Studor vents) are “negative-pressure-activated” one-way mechanical valves. Used most commonly at an island sink or vanity the vents are also located in the attic to prevent the roof penetrations (as seen above) on the front roof line elevation.

Are air admittance valve legal in California?

They are not illegal in California as a state because California Plumbing Code allows “Engineered Vent Systems” see Section 911.0.

Are AAV allowed in New York state?

Although not in New York City, AAVs have been used for decades and allowed in practically all US jurisdictions as a suitable alternative to plumbing stacks.

Are AAV allowed in Florida?

The air admittance valve shall be located within the maximum developed length permitted for the vent. The air admittance valve shall be installed a minimum of 6 inches (152 mm) above insulation materials where installed in attics. P3114.

Are AAV allowed in Massachusetts?

Air Admittance Valves are not permitted, except with Special-permission from the Board. 2. An individual vent, branch vent, wet vent, circuit vent, vent stack, or stack vent shall be permitted to terminate with a connection to an air admittance valve.

Are AAV allowed in NJ?

Air Admittance Valves are Allowed!! As we all know, the use of air admittance valves (AAV) has been a hot topic. In Appendix E, “Special Design Plumbing Systems” (E. 8), the National Standard Plumbing Code (NSPC)/2009 allows the installation of AAVs when the system is designed by a licensed design professional.

Are air admittance valves allowed in Illinois?

Illinois Licensed Plumber

The IPC allows AAV use.

Can air admittance valves be used externally?

Air admittance valves can be installed externally, but this is not very common and is usually only done if the soil pipe is too close to an opening window. Open pipe outlets must be installed more than 3 metres away from a window that opens, but air admittance valves can be closer than this.

Are studor vents legal?

Code is the thing that determines pipe size and also water flow. Hence no studor vents are permitted to toilets because more air is required to keep water flow going with more waste added to the toilet. Utilize Studor to replace sink air vents. Few sinks are connected to the same air vent pipe as the toilet.