I had a plumber tell me that my downstairs bathroom was either unvernted or had a Stuard (or something like that) vent in the wall. Does anyone know what that is? Also, I thought a toilet would not flush without a vented drain… sinks.. showers.. and so on.
In reply to message posted by alwasl8: Is there a way to tell for sure if it is vented or not (or find studor vent) without tearing into walls?
First of all, a Studor Vent (Air Admittance Valve-AAV) is permitted by some but not all codes, for some but not all applications. So far as I am aware, neither the UPC nor the IRC permits an AAV as the sole vent for a toilet.
Second, the codes that DO permit AAVs specify that they may NOT be sealed up behind walls. They need to be accessible for two reasons: 1) to be able to check on them; and, 2) because they need a free supply of air to properly vent, and sealing them behind a wall may deprive them of that free air supply.