In ground drain repair

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by IanD, Oct 26, 2008.

  1. IanD

    IanD New Member

    Oct 26, 2008
    Hi everyone,
    I have been looking at this forum for a while as a guest but finally I need to see if I can get help. I need to repair a 4 inch PVC pipe in the ground (damaged while digging) I have tried reparing it by removing the damaged section and replacing it with a new piece. I secured the new piece using rubber flex couplings (made by Fenco I believe). My concern is that if the inserted piece moves a bit when back filling it will leave a "lip" inside the pipe that will catch debris that comes down the pipe. Is this a concern or am I being overly cautious? The concern arises because even though the new pice is a tight fit between the ends of the in ground pipe I can still wiggle it inside the couplings and get it out of alignment. I thought of using cemented slip couplings but on a couple of test pieces I could not get them to joint easily because as I slide the coupling over the joint it pushes the solvent cement ahead of it and does not leave enough solvent in the coupling to completely weld. Is there some trick to using these slip repair couplings (the local plumbing supply place was totaly unhepful and said they should work just fine.
    Thanks in advance
  2. Redwood

    Redwood Master Plumber

    Dec 15, 2007
    Service Plumber
    Ian you have discovered the reason why many of us do not use slip couplings...

    I would use a regular coupling on one side and a banded coupling like this on the other, or, 2 banded couplings... No Hub couplings are very similar and may be substituted...

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