I'm in the process of adding a shower drain in my basement. My house is fairly new only 2yrs old. I had rough ends for toilet and sink added in during initial contsruction but now I would like to have a shower also. Can anyone give me the best approach as to adding the drain. Can I tap into the existing cleanout stack that runs above the concrete slab or would I be better off breaking the concrete to connect shower drain up with cleanout plumbing below.