How do I know if I have a basement rough in for toilet/sink/shower?
I have an unfinished basement and there are two sewer drains that go into the basement floor, on opposite sides of the basement, one for each ground floor bathroom. Along another wall and away from those drains, about 12" away from the wall, there is a pipe that comes about 3" out of the floor and has a 4" inside diameter and a screw on top. When I open it, I can see that it goes down and quickly bends away toward the wall (presumably out of the house)... it doesn't look like it joins up with the other sewer drains but I can't be sure. My
My question is: Is this a rough in that I can use for toilet/sink/shower drain, should I add a bathroom to the basement? Or is this some other sort of drain that should not be used for waste? How do I know or find out?