shower supply question

Discussion in 'Shower & Bathtub Forum & Blog' started by markmark, Dec 7, 2006.

  1. markmark

    markmark New Member

    Dec 7, 2006
    just wondering on my shower supply line there is a 1/4 flexable copper tube tee'd into the supply line a few feet before the shower head. just wondering what this is and where it goes too?
  2. markmark

    markmark New Member

    Dec 7, 2006
    i followed this tube and it is delivering water whenever the shower is on to a drain in the basement, this appears to be just a waste of water (esecially hot water) has anyone heard of this before and is it nesesarry?
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  4. Cass

    Cass Plumber

    Nov 12, 2005
    It sounds like some DIYers idea of keeping the trap from drying out and causing sewer gas to finds its way into the house.
    I would eliminate it and use RV antifreeze in the trap to prevent it from drying out.
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