Water from main floor shower drain coming out in basement bathroom sink.

Discussion in 'Drain and Sewer Cleaning' started by eskimos44, Jul 8, 2018.

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  1. Jul 8, 2018 #1

    eskimos44

    eskimos44

    eskimos44

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    Long story short... Going to remodel basement bathroom. Pulled out the sink and vanity. Disconnected the trap. Now when the shower is being used on the main floor, water is coming out of the trap pipe... What's going on here?
     
  2. Jul 8, 2018 #2

    frodo

    frodo

    frodo

    Just call me Macgyver Professional Supporting Member

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    sounds like a partial obstruction in
    the shower line, or. the sink is wet vented by the shower [illegal]
     
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