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Thread: Repairing Sewer Pipe from inside

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  1. #1
    I&C Engineer (mostly WWTP) Lakee911's Avatar
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    Default Repairing Sewer Pipe from inside

    Among other problems with my sewerline, I've got a hole in the pipe just on the outside of my foundation. This is also where roots are entering my pipe. It's 4" cast Iron.

    The concrete slab is all but gone in the corner where the pipe exits the house.


    (Click for bigger pic)

    I'm thinking that the wastewater is seeping into the ground from the hole in the pipe. It's always wet in the corner and after washing clothes or long showers it smells kind of bad in that area, but there isn't any overflowing from the drain.

    Do you think it's possible to bust out a couple concrete blocks and part of the footer to expose the pipe and replace the section where there is a hole?

    It's 5- 6feet down and a new (only 1.5 years old) sidewalk is right above this outside.

    Thanks,
    Jason

  2. #2
    Plumber patrick88's Avatar
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    Quote Originally Posted by Lakee911 View Post
    Among other problems with my sewerline, I've got a hole in the pipe just on the outside of my foundation. This is also where roots are entering my pipe. It's 4" cast Iron.

    The concrete slab is all but gone in the corner where the pipe exits the house.


    (Click for bigger pic)

    I'm thinking that the wastewater is seeping into the ground from the hole in the pipe. It's always wet in the corner and after washing clothes or long showers it smells kind of bad in that area, but there isn't any overflowing from the drain.

    Do you think it's possible to bust out a couple concrete blocks and part of the footer to expose the pipe and replace the section where there is a hole?

    It's 5- 6feet down and a new (only 1.5 years old) sidewalk is right above this outside.

    Thanks,
    Jason
    The crack could run out beyond the foundation wall and under the sidewalk you don't want to open. I think you would be better off replacing the full drain to the street. At least to the next hub down. When cast iron cracks it tend to crack more than an inch or two.
    I'm just starting to work with an old friend of mine to bring solar electric and hot water systems, wind turbines, Flex Fuel Boilers, batteries, hydroponic gardening, books, pellet grills and more. Also the parts for DIY installation.

  3. #3
    Moderator & Master Plumber hj's Avatar
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    Default sewer

    Your picture does not show much. I cannot see a hole or crack in that cast iron fitting.

  4. #4
    I&C Engineer (mostly WWTP) Lakee911's Avatar
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    Yes, I know. The hole is on the otherside of the foundation. That's basicly the area that I would have to be working in from the inside. The hole is in the elbow where it turns right outside of the foundation, if I remember correctly. I'm going to camera that sewer again. The last guy that came wasn't able to give me a video.

  5. #5
    Master Plumber master plumber mark's Avatar
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    Talking what I would do

    We have had to be creative in the past on
    a few messes that were literally impossible
    to repair from out under the sidewalk or under
    the pourch....

    when you just cant tear the whole house down or
    tear out the sidewalk, driveway, or whatever....

    usually it has been broken clay tile in most of

    the " manhood contests" I have encountered....



    Now this is what you might want to try.

    if it is a straight shot
    for a goood distance past the break ....with no bends.....




    1. cut your line inside the house...

    2. clean out the roots all the way to the main sewer.
    and flush it out good..

    3 You will have to Reduce the size of the pipe to 3 inch pvc and
    see how far down the 4 inch pipe the 3 inch pvc
    will go..... dont get it stuck

    if you are lucky enough to get way past the break,

    this will suffice and the drain line will work....

    untill you finally have to change out the whole line someday

    even though you
    had to reduce the line to 3 inch....it will last a long, long time.


    4. install a new clean out for the future..
    just in case .. attach the whole thing back up as best possible
    with fernco clamps to the 4 inch

    yes I realize that you are reduceing the line from 4 to 3
    but it will work fine in a sutuation like that.

    or untill you work up the courage to attack it from out in the yard.....


    I am sure this advice will get howls of protest from many here

    but it has gotten me out of a few really nasty dumps over the years
    and they are still working fine. today

  6. #6
    Retired Defense Industry Engineer jadnashua's Avatar
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    Default

    There are companies that reline the pipe from the inside. Costly, but then again, so is tearing up landscaping, sidewalks, etc. You could see if there is a company in your area and get a quote.
    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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