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Thread: pvc pipe cracked inside a cement wall

  1. #1

    Default pvc pipe cracked inside a cement wall

    greetings,
    i'm a new home owner and i've got a sump pump that has pvc piping going up and out through a hole in the cement wall in an unfinished basement. the pvc pipe that goes through the wall has broken off a bit on the exterior side. outside you can remove the arm joint that connected to the piece that goes through the wall, but the piece that goes through the wall is glued or cemented to the concrete. it's cracked and a small amount of it is missing such that water will squirt down the exterior cement from the arm joint.
    how can i remove that cracked pvc pipe? do i just need to fit a smaller pipe inside the cracked one? should i use rubber tubing?
    if what i wrote above was unclear i can email a photo. thanks.
    -mj voss

  2. #2
    Master Plumber master plumber mark's Avatar
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    Talking cracked pipe

    if it is 2 inch you could probably get away with
    an 1 1/2 pipe going through it

    if it is 1/1/2 I suppose you could run an 1 1/4 pvc pipe
    through it too.....

    we sitll run into 1 1/4 lines fo rsump pumps...so it probably
    wold get you out of troubles of getting that pipe out of the wall

  3. #3
    Licensed Grump GrumpyPlumber's Avatar
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    Idea...
    Caulk the outside diameter if the exterior portion with silicone...insert, the silicone should both seal and hold it in place.
    The right thing to do....chisle out the adhesive inside...work the pipe out and replace it.
    "The biggest regrets we have in life are the chances we never took."

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    Commercial Plumber markts30's Avatar
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    Why not run a "ram bit" through the hole...
    It will chew the pipe out of the hole and allow you to push a new one through....
    Did that at one of the jobs I am at...
    Used a 12" extension and a bit of time but was successful in boring some 3" PVC out of a 10" thick wall that some idiot (insert concrete worker's name here) had snapped off flush while operating a backhoe...

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    Licensed Grump GrumpyPlumber's Avatar
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    Beats the heck outta my idea on chiseling adhesive, but wouldn't that chew up the rambit with the surrounding concrete?
    "The biggest regrets we have in life are the chances we never took."

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    Commercial Plumber markts30's Avatar
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    Didn't hurt the bit - the bit itself is the size of the pipe - Concrete was smooth so it just acted like one long fitting hub....

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    In the Trades Bob NH's Avatar
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    I don't know what a Ram-bit is but if I had to do it I would cut both ends off flush and apply heat (torch or heat gun) to the PVC. PVC will soften and you should be able to collapse it into the hole to remove and replace it.

    You could also run a hacksaw blade or a SawZall through inside the pipe to cut it. Use a junk blade that the concrete will not ruin and work from both sides if necessary. As I write this, I think I would start with the SawZall rather than the heat. Two cuts along the pipe should let you knock it loose and out.

    If you use the same size pipe you will have to clean out the hole a bit as you have "zero clearance" from pouring the concrete around the original pipe.

    Seal around the new pipe with silicone.

  8. #8
    Commercial Plumber markts30's Avatar
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    Quote Originally Posted by Bob NH
    I don't know what a Ram-bit is .
    Here is the manufacturer's catalog with the rambit in it...
    Gives a good pic or 2 of it in action....
    They work really well and have saved me lots of time and the company a good bit of money in the past...
    http://pascospecialty.com/catalog/PASCO_CATALOG_C.pdf

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