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

Yes, an air admittance valve (AAV) can be installed inside a wall, as long as it is accessible for maintenance and cannot be obstructed. Plumbers are required to adhere to local plumbing and building codes when it comes to the installation of AAVs.

May 26, 2022 · Discover everything you should know about air admittance valves (AAVs) and how you can install one yourself to save time and money. A common problem in plumbing remodeling is how to run new vent lines when a structural element blocks access to …

Jul 13, 2016 · Yes, you can install the AAV in just about anything. It just has to be accessible for servicing. So, you can cover it with a panel screwed in place, install a cabinet door over it or just leave it open.

Apr 4, 2022 · An air admittance valve (AAV), sometimes called an auto vent, is a device attached to the fixture drain line. It has a mechanism that opens up to admit room air into the drain under the force of the negative pressure caused by water flowing through the drain.

Nov 11, 2020 · You should purchase your AAV prior to configuring your waste piping and consult the AAV manufacturer's instructions. There are also requirements for the required height of the AAV above the horizontal piping (typical minimum is 4").

Sep 22, 2010 · Apparently I have an AAV in my bathroom wall that works for both my sink and toilet. It is 4 to 5 feet above the floor. I haven't had any problem with it, but am worried about it possibility of it failing and leaking sewer gas into the wall. What is the best solution for this?

Mar 26, 2025 · I checked code and found AAV's are not allowed on toilets due to the change of pressure when flushing. AAV's are allowed in the wall BUT must be accessible for servicing and should be covered with a grill to allow unimpeded air flow.

Air Admittance Valves (AAV) — Oatey ®Sure-Vents® — are mechanical devices installed to a plumbing fixture, replacing a secondary vent. These valves allow one-way ventilation, removing the need to connect to an existing venting system or run a separate, potentially unsightly ventilation system.

An Air Admittance Valve (AAV), which you may also hear referred to as a Studor Vent, Studor AAV or Mini Vent, is a one-way mechanical valve that is installed locally at the site of a plumbing fixture, allowing proper venting to occur without a connection to a …