I'm looking to install a basic basement shower, toilet, and sink in what used to be a coal cellar. It's a block 8'x9' room off of the main basement at the front of the house. Ceiling is 6'8". It's under a poured slab front porch (ceiling of coal cellar is bottom of slab, so the whole room is concrete- block walls and a poured ceiling and floor). There's an old coal chute that is just above grade, and it's bricked up. The main waste stack from the upstairs bathroom is right outside the coal cellar (in the basement), and that runs under the coal cellar and out to the street. There is a floor clean-out in the coal cellar and it drops vertically about 3-4 feet before exiting to the street. The clean-out is cast iron.
Here's what I'd like to do: break up the floor and tie into the vertical floor clean-out to drain the new shower, toilet, and sink. I would keep it as a floor level clean-out. Any potential problems with this situation? I was told that the stack from the upstairs bathroom, which is about 8 feet away from the floor clean-out, would serve to vent the new bathroom. Can that be done? Any thoughts and opinions are appreciated.
Here's what I'd like to do: break up the floor and tie into the vertical floor clean-out to drain the new shower, toilet, and sink. I would keep it as a floor level clean-out. Any potential problems with this situation? I was told that the stack from the upstairs bathroom, which is about 8 feet away from the floor clean-out, would serve to vent the new bathroom. Can that be done? Any thoughts and opinions are appreciated.