4 Inch PVC Sewer Line Through Cinder Block Foundation Wall In Crawl Space

Discussion in 'Plumbing Forum, Professional & DIY Advice, Tips & ' started by DanMcD, Oct 8, 2012.

  1. DanMcD

    DanMcD New Member

    Messages:
    121
    Location:
    Dayton, OH
    Do you need a protective sleeve to bring a 4 Inch PVC sewer line through the hole in my Cinder Block Foundation Wall?

    My plumber says no. Also, they seal the hole so water does not enter my crawl space.
  2. Terry

    Terry Administrator Staff Member

    Messages:
    14,798
    Location:
    Bothell, Washington
    Your plumber has it right.
  3. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,292
    Location:
    Cave Creek, Arizona
    IF you put a sleeve around the pipe, then you have to seal the sleeve AND the pipe. THe only time I use a sleeve is when I give it to the block layers and they put it into the wall and I run the pipe through it later.
  4. DanMcD

    DanMcD New Member

    Messages:
    121
    Location:
    Dayton, OH
    Thanks Terry and HJ. Nice to know my plumber knows his stuff.
  5. JoshRountree

    JoshRountree New Member

    Messages:
    32
    Location:
    Fleetwood, NC
    Depends on the code, in NC any time pipe is run through a foundation wall it must be sleeved.
  6. DanMcD

    DanMcD New Member

    Messages:
    121
    Location:
    Dayton, OH
    So what is the reason/rationale behind the code in NC to require using a sleeve any time time a pipe is run through a foundation wall?
  7. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Messages:
    21,820
    Location:
    New England
    A sleeve might allow you to replace the pipe at some later time without having to break the wall. Depending on the temperature extremes, a sleeve might allow the pipe to expand and contract without rubbing on the concrete. Some soils swell and shrink depending on their moisture content and a sleeve might allow a little flexibility so the pipe isn't rubbing or flexing directly in the concrete wall.
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