I have a plumbing question and hope that someone with plumbing knowledge will lend a hand.

Can I connect my toilet drain line where the red circle is drawn to my second toilet? The T fitting just before the red outline is connected to a toilet to the left and a vent stack above. My question is if my toilet is less than 4’ away from this vent stack, and I’m using 3” ABS, can I tie my wasteline from the second toilet directly into the wasteline downstream from the stack and still achieve proper ventilation? I also, is this acceptable per code in CA?

Thanks a ton!

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  • Within 5 of the vent you should be ok. – Ed Beal Dec 6 at 18:58
  • The wood looks old but the concrete footings looks quite new, was the foundation rebuilt on this house or am I seeing things? – Gary Bak Dec 6 at 21:27
  • No foundation work has been done. The plumbing question is the one I’m looking for an answer to. Can I wet vent the 2nd toilet where the red circle is drawn? – Layhammer Dec 6 at 21:36

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