: I am remodling a laundry room into a bathroom. There is a floor joist between the proposed location of the toilet and the existing waste pipe, is there any way that I can cut a 3 inch hole in the 2x10 joist? If I go below the joist I will be below the waste pipe. If I decide to run a new line, can I vent just outside the house (without going all the way to the roof line) and how high does it have to be?
Pat, Use a 3-1/2" hole saw to drill the joist. keep to the center as much as you can. The vent can be run outside and termanate where you want as long as it is not within 10ft of an openable window It has to be at least 6" above the flood level rim of the toilet. (22") Dale's Plumbing Service LMP