Frozen pipe had been drained

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by LisaW, Feb 25, 2015.

  1. LisaW

    LisaW New Member

    Joined:
    Oct 26, 2004
    Location:
    District of Columbia
    Hi. In the fall, I drained my outside line and shut off the interior valve that provides water to the outside line. I still had a burst this winter in the outside line and there was moisture seeping through the drywall - this gave me the clue to the break. When I turned the valve back on to test for a break, water gushed out the wall as I would have expected. Would a drained line with a shut off valve still have had water in it to leak and show moisture in the drywall? Thanks.
     
  2. Gary Swart

    Gary Swart In the Trades

    Joined:
    Sep 1, 2004
    Location:
    Yakima WA
    Assuming this is a frost-free faucet and you left a hose connected. If so, that prevented the water from draining.
     
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  4. LisaW

    LisaW New Member

    Joined:
    Oct 26, 2004
    Location:
    District of Columbia
    'Thank you, but no - nothing attached. In the fall, I turned off the valve to the line, opened the faucet until all the water came out, then closed the faucet.
     
  5. Reach4

    Reach4 Well-Known Member

    Joined:
    Sep 25, 2013
    Location:
    IL
    My guess, based on your new info, is that you do not have a frost-free faucet, and that your shutoff valve leaked enough water through to fill the pipe that froze. If you had left the spigot open during the winter, that would have been less likely to happen, I think.

    Anyway, replace the spigot with a frost-free spigot, and that problem goes away. Maybe do that to the other spigot too, if you have one.
     
  6. Terry

    Terry Administrator Staff Member

    Joined:
    Aug 17, 2004
    Occupation:
    Plumber
    Location:
    Bothell, Washington
    It may be that the shutoff valve does not close all the way. In that case, leaving the outside faucet open to drain may be better.
    Normally, if the isolation valve is off, and it has been drained down, you're fine.
    Lateley I have been replacing those broken sections with PEX. It has a bit more give when freezing.
     
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