main line replacement question

Discussion in 'Drain and Sewer Cleaning' started by twinsig, Oct 6, 2018.

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  1. Oct 6, 2018 #1

    twinsig

    twinsig

    twinsig

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    Guys,
    Tomorrow I will be (begin) replacing my main line (cast iron, circa 1970) with PVC.

    Question: What would be the proper method and/or material I should use to seal the foundation penetration?

    Concrete BLOCK wall w/crawl space. No basement.

    That area usually stays a bit damp.
    I get some seepage after moderate rain.
    Gets wet along that section after heavy rain.
    No standing water (outside) after rains, has adequate run-off/drainage away from the house.
     
  2. Oct 6, 2018 #2

    journeyman

    journeyman

    journeyman

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    Hydraulic cement
     
  3. Oct 6, 2018 #3

    CST Mechanical

    CST Mechanical

    CST Mechanical

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    Hydraulic Cement... Ball it up and keep packing it in until the gaps are completely sealed. It actually reacts with any ground water (any water actually) to become water tight. Great stuff. One thing I've seen guys try is spray foam! DO NOT TRY THIS!!!! It will soak up water like a sponge!
    www.coastmechanical.com
     
  4. Oct 6, 2018 #4

    Jamesplumbing06

    Jamesplumbing06

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    I usually fill block cavity with the great stuff foam made for water barrier. The label has koi pond on it. Then fill around block with hydro cement. But hydro is pretty good stuff. But be ready and be fast. It sets up hot and fast.
     
  5. Oct 6, 2018 #5

    FishScreener

    FishScreener

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    Non shrink grout.
     
  6. Oct 7, 2018 #6

    twinsig

    twinsig

    twinsig

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    Not too tough of a day, still gotta do the sealer and cover up. Apparently sealing penetrations in the 70's wasn't common! There was ZERO evidence of any type of sealing/waterproofing! Just dirt since day-1!..

    Thanks for the advice
     

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