I am installing a new bathroom with a pedestal sink. There is not enough room in the sink column (base) to hide the trap and AAV. My wife was hoping to just see the sink and not the plumbing. Is it possible to mount the p-trap and AAV directly below the sink in the floor? There is plenty of room to do this and still get enough slope for the drain water. Putting the drain in the wall is not an option in this case.