Studor Vent

A Studor Vent or Air Admittance Valves (AAV) can be used in place of expensive and complex plumbing (open pipe) drainage systems that penetrate the roofs of buildings.

The purpose of these vents is to allow air to enter the plumbing drainage waste and venting system and equalize pressure when water drains out of the system maintaining the water seal in the trap that prevents sewer gases from entering the building through fixture drain lines.

How an AAV works:

When a plumbing fixture is operated, negative pressure causes the AAV to open, allowing air to enter and equalize the pressure in the system. When the water flow stops, gravity closes the valve preventing sewer gas from escaping through the valve into the building.

Typical signs you need to install or replace an air admittance valve in your plumbing system, is bubbling or gurgling in the drain pipe or slow draining fixtures.

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