Do I Need an AAV or Just a Sanitary Tee for Venting? If you’re finishing your basement bathroom and considering venting options, you might be wondering whether to use an Air Admittance Valve (AAV) or if a simple sanitary tee will do. Let’s clear up the confusion and walk through the proper venting process. Q:… Continue reading Do I Need an AAV or Just a Sanitary Tee for Venting?