240sxguy
New Member
I have a situation where one bathroom is right above the other and the Ptrap for the upstairs shower hangs down really far into the lower bathroom. I want to move that Ptrap up and tight to the floor. Unfortunately this will create a drop roughly 3x the pipe ID and could cause trap siphoning. My shower arm already has an AAV installed about half way to the main drain/vent stack.
So, in this situation if I re-plumbed the drain and kept the AAV in place, would I be free to increase to a more dramatic drop after the AAV? I'm aware that WI has some unique rules but I wanted to do my homework on this one and find out what the generally accepted practices were.
Thank you!
So, in this situation if I re-plumbed the drain and kept the AAV in place, would I be free to increase to a more dramatic drop after the AAV? I'm aware that WI has some unique rules but I wanted to do my homework on this one and find out what the generally accepted practices were.
Thank you!