Ken Tannenbaum1
Member
I've got a bathroom next to a kitchen with waste lines embedded in a slab and ALL CONNECTED BEFORE THE TOILET. There's a 24" foundation wall flush with the framing so I can't enter the framing under cabinets. The incoming lines will run in a box along the baseboard. The thing is. I don't know where to run the vent
through the roof. The setup is pictured here and I thought a SINGLE 3" vent could be to the left of the TOILET where the wall surrounding the bathroom will come away from the rear wall and run up through the roof there. If THAT 3" is reduced to 2" and runs to where the vanity is, is that enough to vent the four appliances?