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Thread: Pex piping

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  1. #1
    DIY Junior Member lancejohnson1999's Avatar
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    Default Pex piping

    I ran 3/4" pex piping 100' between my house and garage. I did not use INSULATED pex pipe. I ran the pex pipe about 4' deep. Will it freeze during the winter months? Do I need to change it to insulated pex pipe? What can I do to prevent the pex pipe from freezing?

    Thanks for any response.
    Lance

  2. #2
    That's all folks! Gary Slusser's Avatar
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    I've never heard of insulated PEX or any other normally used water line material. You add insulation to whatever you use but...

    If the 4' depth isn't going to prevent freezing you should bury it deeper; below the frost line for your area.

    3/4" PEX has the smallest ID of any 3/4" material you could use. A much better choice would have been 3/4" 160 psi rated PE pipe.
    Gary Slusser Retired (= out of business)
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    Forum Admin, Expert Plumber Terry's Avatar
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    Your local plumbing inspector or water provider can clue you in on freeze depth in your area.
    It can vary, I've heard of five foot cover near Sun Valley Idaho and in Seattle we require two feet. Seattle is sandwiched between two bodies of water, which keeps things pretty even.

    And like Gary mentions, the Poly has a bigger inside dimension for outside use.

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    General Engineering Contractor ballvalve's Avatar
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    Retired Defense Industry Engineer jadnashua's Avatar
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    As long as the pipe is below the frost line, it shouldn't freeze. Now, when it comes up into the structure, depending on how close it is to the foundation, outside of the heated areas, it could freeze there. Insulation won't help a lot, as it only slows the heat transfer, not stops it.
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  6. #6
    That's all folks! Gary Slusser's Avatar
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    That insulated PEX is not for underground or to keep water in it from freezing. It is used for heating systems.

    Here's a spec sheet.
    http://www.pexsupply.com/HydroPEX-CD...EX-Pipe-1-foot
    Gary Slusser Retired (= out of business)
    Click Here to learn how to correctly size or program a water softener.
    CAUTION, as of Nov 12 2013 all YouTube videos showing how to rebuild a Clack valve have an error in them that can cause damage.

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