If I plumb each fixture inside my house using an air admittance valve (AAV), my understanding is that they will drain/flush properly since air is being let into the system.
My question concerns the sewer gases that will need to be removed from the system. Instead of venting the fixtures in the traditional manner, resulting in a roof penetration, can I simply vent the main DWV 4" line just before it enters the house? Seems to me that the gases are going to rise at the first opportunity.
So, would the combination of AAV's and a single exterior vent suffice?