I am doing a bathroom remodel on a second floor and will be moving the toilet and sink locations. I will be able to access the floor joists from the first floor to run new drain pipe, then run it down to the basement through a closet. But I don't see how I can connect to existing vent stack. The layout of my plumbing will be similar to this picture. My question is can I use an AAV in the sink cabinet instead of connecting to the vent stack?