Studor Vent

Studor is a registered trade mark of Studor, Inc., a company established by Sture Ericson who developed the air admittance valve in Sweden in the early 1970’s. The Studor Vent replaces the vent piping for a sanitary drainage system in a building that extends from the fixture trap to the exterior, typically at the roof. The company, Studor, Inc., was bought out by the IPS Corporation in 1998.

Studor vent has become a term that refers to any air admittance valve of equal function. The vent is approved for use by most plumbing codes. It is commonly used where standard vents are difficult to install, such as at island cabinets in kitchens with no adjacent wall for enclosing a vertical plumbing vent.

The vent works by acting as a one-way valve, allowing air to enter the plumbing system when a fixture discharges waste water. Gravity causes the valve to close when the negative pressure from the discharging liquid stops moving through the waste pipe.

The air admittance valve (AAV) can generate cost savings by eliminating the need to install vent pipe. An additional benefit is that the sewer gases are said to be contained in the sewer system which may improve air quality.

The Studor vent should be accessible for inspection and replacement.