Results 1 to 8 of 8

Thread: PVC repair couplings - gluing technique?

  1. #1
    Join Date
    Sep 2006
    Location
    Las Cruces, NM
    Posts
    2,034

    PVC repair couplings - gluing technique?

    PVC fittings are said to seal because their openings are tapered and the usual gluing technique fuses the pipe to the fitting. But how do PVC repair couplings ( e.g. https://www.lowes.com/pd/charlotte-p...E&gclsrc=aw.ds) seal? My understanding is that a repair coupling will temporarly slide completely over one pipe and then be slid back to overlap two pipes in order to hold the two pipes together. Does the usual gluing technique seal such a joint reliably?

  2. #2
    Join Date
    Dec 2012
    Location
    Bedford, NH
    Posts
    1,286
    Yes it will.
    Thoughts entering one's mind need not exit one's mouth!
    As I age my memory fades .... and that's a load off my mind!

    "We Live In The Land Of The Free, Only Because Of The Brave"
    “The problems we face today are there because the people who work for a living are outnumbered by those who vote for a living."
    "
    Socialism is a philosophy of failure, the creed of ignorance, and the gospel of envy, its inherent virtue is the equal sharing of misery." Winston Churchill

  3. #3
    Join Date
    Jul 2007
    Location
    NE OH
    Posts
    2,612
    I have found them to work OK, but they are a little tricky to install and you only get one shot. You have to slide the coupling (dry) all the way on one pipe, apply a heavy coat of solvent to the two pipe ends, and quickly slide the coupling to its final position in one smooth motion, preferably with a 1/4 turn rotation to help spread the solvent. If you stop in the wrong place, it's cut out the pipe and do over as the coupling will seize quickly in the wrong place. You can get PVC solvent with that sets a little (very little) slower and that helps. Mark the pipe so you will know when the coupling is in the right spot.

    There are a couple of things working against getting a good weld: you can't apply solvent to the inside of the coupling and the sockets aren't tapered. But the weld surface is large and DWV pipes aren't under much pressure, so the couplings usually work OK. Still, I avoid using them if I can, but sometimes there is no other practical solution.

  4. #4
    Join Date
    Apr 2013
    Location
    Okotoks AB
    Posts
    3,495
    Blog Entries
    1
    A good trick to extend the working time of PVC solvent cement is to apply a coat, wait a few minutes until it's just dry to the tough & then apply another generous coat & put the joint together. I think with one of those repair couplings, I'd do a third coat before assembling.

  5. #5
    Join Date
    Sep 2009
    Location
    Medina Ohio
    Posts
    4,513
    Make sure you mark the half way point before you glue so you know if the fitting is in the right spot

  6. #6
    Join Date
    May 2007
    Location
    Newburgh, Indiana
    Posts
    918
    I have used a slip over rubber repair sleeve with several hose clamps. Easy and reversible but more costly than PVC.
    Life's too short to use old sandpaper.

  7. #7
    Join Date
    Jan 2009
    Location
    N.E, Ohio
    Posts
    3,026
    Bob has the best solution and the only I would do it. No leaks is worth the extra cost to me.
    George

    Making sawdust regularly, occasionally a project is completed.

  8. #8
    You can get a repair coupling that has a threaded locking ring and rubber gasket at each end Take locking ring and gasket off one side, and slide them over pipe, along with body of coupler. Do the same for other side, minus the couple body. Center body over repair areas, and slide up rubber gaskets and tighten locking rings. You can also get a version that solvent welds on one end, and has gasket and locking ring on the other.
    Last edited by Bruce Wrenn; 07-25-2019 at 8:48 PM.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •