Aug 4, 2025 · One solution is an air admittance valve or AAV. These valves are gravity-operated devices that respond to the negative pressure of draining water and open to let air in.

Air Admittance Valves (AAV) are one-way vents installed after the trap on the drain line of a fixture. They're designed to address negative air pressure in the drain system, created when a …

Dec 3, 2025 · 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 …

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 …

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 …

Oct 20, 2021 · An Air Admittance Valve (AAV) 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 …

Definition of Air Admittance Valve (AAV): An AAV is a one-way valve that allows air to enter the drain to satisfy the vacuum caused by water passing down the drainage system, but that …