Sleeving 1" PEX underground?

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by wombat, Jun 26, 2020.

  1. wombat

    wombat New Member

    Joined:
    Aug 21, 2011
    Location:
    New Jersey
    The Plumber wants to bore under Slab of a Condo to by pass pre-existing galvanized pipes.
    It will be One Inch PEX. I have read that it's a good idea to Sleeve underground PEX but apparently it is not required by code in WA. It is required by code in CA.

    There does not seem to be any pre-sleeved One Inch PEX on the market. One would have to sleeve it in PE .
    It is overkill to insist on Sleeving and if not how big should the PE sleeve pipe be?
     
  2. Jeff H Young

    Jeff H Young In the Trades

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    Feb 27, 2020
    Location:
    92346
    No not overkill at all thats the owner spec good Idea unless he cant bore it . I wouldnt care what it was sleeved in PE is fine . 1 1/2 inch or whatever fits
    Im in CA havent run much pex but havent heard that sleeving was required
     
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  4. JohnCT

    JohnCT Member

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    May 16, 2018
    Location:
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    Total amateur observation here, but everything I've read about PEX is that you don't want want anything touching it that can leach chemicals into it. I don't even want to use a Sharpie on mine..

    Underground, it seems that ground water could transfer all kinds of goodies into contact with it. I would definitely sleeve it if it were mine.

    John
     
  5. Jeff H Young

    Jeff H Young In the Trades

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  6. Reach4

    Reach4 Well-Known Member

    Joined:
    Sep 25, 2013
    Location:
    IL
    I am not saying you should have sleeving, but if you want that, it seems to me that 1-1/4 or bigger pressure-rated pvc would be better protection. The fact that it is more rigid might make it harder to install however.

    Another thing to consider would be some 1-1/4 or bigger SIDR pipe. Much cheaper than PEX in those sizes.

    1 inch pex is 1-1/8 od. PVC and SIDR pipe are bigger ID than their nominal sizes.
     
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