Thorngrove
New Member
I’m replacing all the cast iron waste pipe…2 sinks, 2 toilets, 1 shower. All fixtures connect to 4” horizontal which runs to main stack.
Question…can I replace with 3”? The stack will remain 4” though.
Also…a toilet is directly above the current horizontal run…it currently uses a sanitary tee on its back, the way I understand things, shouldn’t it be a Wye instead? I’ll attach some pictures cause Im sure I haven’t explained things well enough. First time being on a forum and asking a question…so I do appreciate any guidance and thank you in advance.
Question…can I replace with 3”? The stack will remain 4” though.
Also…a toilet is directly above the current horizontal run…it currently uses a sanitary tee on its back, the way I understand things, shouldn’t it be a Wye instead? I’ll attach some pictures cause Im sure I haven’t explained things well enough. First time being on a forum and asking a question…so I do appreciate any guidance and thank you in advance.