I am looking at using a AAV for a new project. There is no way I can vent the lavatory without using one. I also want to do the same with a toilet. Have you used an AAV and what are the limitations? The Rectorseal brand seems to work for 1 1/2" applications but our code now calls for 2" lines for sinks. How did you resolve this? http://www.rectorseal.com/Micro-Magic-Vent.php The toilet drain is obviosuly much larger. Can an AAV be used in that application? Thanks to my friends and pros who typically have great advaice!