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Thread: water pipes outer wall

  1. #1

    Default water pipes outer wall

    I have a bathroom that faces the outer wall of my house. The copper water pipes for the sink come up through the floor. I want to put a pedestal sink in but that would require (I believe) that the pipes enter the pedestal through the outer wall. the contractor mentioned using a kit? Can this be done withut worry of frozen pipes?

  2. #2
    Licensed Grump GrumpyPlumber's Avatar
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    YES!
    As long as you live in Hawaii.
    You'd be better off running them through the floor.
    "The biggest regrets we have in life are the chances we never took."

  3. #3

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    the base of the pedestal sink is solid only the back is open so that would prohibit the pipes entering from the floor.

  4. #4

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    Quote Originally Posted by GrumpyPlumber
    YES!
    As long as you live in Hawaii.
    You'd be better off running them through the floor.
    The base of the pedestal is solid so that would prohibit the pipes from entering through the floor. I am not sure what the contractor was thinking but i did tell hime it is an outer wall bathroom. live in Chicago area.

  5. #5
    Retired Defense Industry Engineer jadnashua's Avatar
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    It's not a good idea to run pipes in the outside wall; especially if the airflow could be blocked to the wall face.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

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    DIY Senior Member Marlin336's Avatar
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    While it's a good idea to try and avoid it, I see it done all the time and their is rarely a problem so long as the heat is on. If you do put them in the wall make sure to insulate them well as long as us regular insulation between them and the outside wall.

  7. #7
    Forum Admin, Expert Plumber Terry's Avatar
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    In the Seattle area, it's common to have pipes in outer walls.
    Maybe not the best thing to do, but it's done.

    That being said, in my years of going back and repairing frozen pipes, what seems to work best is:

    Don't insulate the pipes.
    Do put wall insulation between the pipe and the outer wall.
    What ever heat is in the home will get to the pipe better that way.
    There was one home I repaired several times.
    The only method that worked was with uninsulated pipes, and insulation placed between the pipes and outer wall.

    Since this is for a pedetal lav, at least the wall will be exposed to the rest of the home.

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