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Can I tie a basement bathroom with 3 fixtures into a 2" existing vent? The vent currently supplies basement sink and washing machine with the upstairs sink and dishwasher. The upstairs also uses this as a drain I believe. Would this be considered a wet vent?

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  • If things above use it as a drain, it's a wet vent, and that seriously impacts how much you can attach to it.
    – Ecnerwal
    Mar 31 at 18:53
  • Thank you. May look at a different route.
    – user150200
    Apr 1 at 11:45

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