I am adding a shower (which I have to cut the concrete out for), toilet, which already has a 10" pipe with a rounded cap on it, and a sink, which I believe ties into a 2" black pipe that runs up through the upstairs and comes out of the concrete basement with a threaded cap on it. My question is, am I correct so far in what I am assuming? I will take pictures and post them in the morning because I am a fireman and have to work till in the morning. Unless I can get my wife to do it, I just want to be a 100% sure of what i'm doing before I go jack hammering out concrete and tieing into the wrong stuff or connecting the sink to the wrong stuff.