Are these Concrete? How do I connect PVC?

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by froddan, Jul 11, 2007.

  1. froddan

    froddan New Member

    Messages:
    52
    Hi!
    I have some roots in my sewer and need to replace a 10 foot section with PVC.

    The pipes are concrete (I think) sections, just short of 3 feet each about 5.5 - 6 " in diameter on the outside. They are connected into eachother because they are larger at one end (this is where the roots are growing).

    I have attached a couple of pictures.

    How do I connect PVC to these?
    Do I cut the concrete with a saw?
    Should I cut them in the thinner section and use a fernco coupling to PVC, or can I stick the PVC into it? I guess the inside diameter could be 4" then the latter wouldn't work...

    Thanks for any advice!

    Attached Files:

  2. Alectrician

    Alectrician DIY Senior Member

    Messages:
    689
    I recently cut mine with an angle grinder/diamond blade. It was difficult to manuver and a little tricky to get at the bottom. I am thinking that someone makes a stiff carbide sawzall blade that may work easier.



    Repair with the appropriate sized rubber coupling/stainless steel hoseclamp thingy. The OD of the 4" concrete pipe is much larger than that of the 4" PVC so the rubber coupling is flared out a bit. The make those couplings for several diferent types of pipe (clay for example) that are slightly different dimentions so measure accurately.

    Here's a tip and old plumber at a supply house passed on to me. Use a razor knife and cut the "stop" out of the center of the rubber coupling and it will slide all the way back on to your pvc, allowing the a tight fit piece to slip into place.


    Here's a tip from me. Put in cleanouts while you're at it.
  3. GrumpyPlumber

    GrumpyPlumber Licensed Grump

    Messages:
    1,404
    Location:
    Licensed Grump

    Roll the rubber back after it's over the pvc side, then roll it back over the adjacent pipe once in place.
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