TJP
New Member
Hello, I am new to the forum and new to home improvement. I have an unfinished basement that I would like to add a bathroom to. I have cut a hole, dug and located the 4" cast iron main that the upstairs main feeds into. My question is, can I connect to this underground main with ABS pipe or is cast iron required under concrete slab? The soil I have encountered is like clay with very little rock and not much moisture. Any help would be greatly appreciated.