AAVs aren’t new. Developed in Europe back in the ’70s, the Studor Air Admittance System (Studor, 800/447-4721, ) was introduced in the United States in 1988. Now, AAVs are accepted by virtually all national building codes, including the SBCCI, BOCA, IRC, and IPC plumbing codes.

Are studor vents code?

The Studor vent lets that air to be sucked in the pipe during water flow but doesn’t let sewer gas escape out. 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.

Does a studor vent need to be accessible?

STUDOR AAVs shall be accessible should replacement be required. For in-wall installation, use STUDOR recess box/grill combination. STUDOR AAVs location must allow for adequate air to enter the valve. When located in a wall space or attic space lacking ventilation openings, opening shall be provided.