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Thread: Hot leak under-slab any advice ?

  1. #1

    Question Hot leak under-slab any advice ?

    Seeking advise. I found my bathroom floor tiles warm but there is no water seeping through the slab. I had a licensed technician diagnosed the hot spots. Technician determined there is a hot leak. He advised us to turn off the hot water valve at night or if not using. My electric bill this year for month of Feb was $296.00 and March was $460.00. I have not received my water reading. The house is 50 years old with galvanized steel pipes under the concrete slabs. Got a quote from a licensed plumbing contractor for $4,600 to re-route the hot and cold pipes. Need advise which option should I choose?
    1) Re-route and insulate copper pipes over flat roof
    2) Re-route and insulate copper pipes around the outside of the house (under the eaves).
    3) Check with the City and ask for their recommendation
    I appreciate your input. Thanks.

  2. #2
    Master Plumber master plumber mark's Avatar
    Join Date
    Feb 2005
    indianapolis indiana - land of the free, home of the brave....
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    Talking re-route pipes around sides of house

    you are very lucky that you live in Florida...

    around here you have to run them either in the attic
    or overhead visible within the home and have someone box them in with wood ...

    I would probably run them along the sides of the house
    right up in the corners so they are not that visible and then drop down and then paint them because

    if you ever need roof repairs or work done it could be an issue.... and the roof heat of probably 125++ in the summer will make the cold water lines seem hot , even if you insulate them...

    the price is the only issue here... $4600 might not be all that bad--I dont know how big a house...

    get some other estimates, and check the BBB

  3. #3
    Retired Defense Industry Engineer jadnashua's Avatar
    Join Date
    Sep 2004
    New England


    My preference (and I'm not a pro) would be to run them inside in a chase, maybe high up the ceiling unless a convenient place was found elsewhere. Running them in the attic can mean very hot cold water. Not too bad if you run them under the insulation right next to the roof, but still hot.
    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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