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Thread: Mysterious black hose connected from wall under my bathroom sink to the sink drainpip

  1. #1

    Default Mysterious black hose connected from wall under my bathroom sink to the sink drainpip

    Anyone know what this hose is comming from wall going to my sink drain pipe under my bathroom sink...the otherside of the wall is a fire place in the bedroom.......anyone?

  2. #2
    Moderator & Master Plumber hj's Avatar
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    Default hose

    The most common reason for it is that it is the condensate drain from your air conditioner.

  3. #3
    Plumber jimbo's Avatar
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    Default

    The first thing that comes to mind is a condensate drain from an air conditioner. Do you have an A/C above, such as in the attic? It is common to run the condensate drain down to a wye tailpiece under a sink.

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