Leaky PVC joint

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by pilotjack, Feb 10, 2007.

  1. pilotjack

    pilotjack New Member

    Feb 8, 2007
    I have read several posts about bad pvc joints and I have one. Normally, I would simply cut out the bad joint and fix the problem, however, I'm in a real tight spot. The elbow that is leaking has a sanitary tee right next to it and a toilet flange above it. I have some room to cut between the toilet flange and the elbow, but there is no room between the tee and the elbow.The tee is for the vent connection. Immediately after the tee the pipe goes into a wall and into a finished basement. Since I would rather not destroy finished space to fix this, I was wondering if there is a way to cut the joint between the tee and the elbow and remove the remaining peice of 3" pipe that is inside the tee's flange without damaging the tee? That way I can replace the elbow. My only other option (short of destroying finished space) is to cut the pipe above the joint between the toilet flange and the elbow, put a 3" coupler on the toilet flange and connect the coupler to the offending elbow flange with a 4" boot. any thoughts
  2. hj

    hj Moderator & Master Plumber Staff Member

    Aug 31, 2004
    Cave Creek, Arizona

    A 3" RamBit will drill the remaining pipe out of the tee's socket.
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  4. pilotjack

    pilotjack New Member

    Feb 8, 2007
    Thanks for the advise, I don't have a rambit but I see if my home center has one. Are they difficult to use?
  5. Bob NH

    Bob NH In the Trades

    Oct 20, 2005
    New Hampshire
    You are working with a sanitary system without pressure. If you have access to the leaky area, you may be able to seal it.

    Take a torch and a piece of steel rod ground down to a small area at the end. Heat up the end of the rod and use it to move some of the PVC into the hole. It must be hot enough to "weld" across the hole. It takes a bit of practice but can be a lot easier than cutting out and replacing a fitting.
  6. lee polowczuk

    lee polowczuk New Member

    May 30, 2007

    i have a similar problem and my try this... i don't have a drip..but a do have a leak.

    a droplet forms and then falls every 15 minutes or so. i did 10 pvc welds this weekend and one horizontal one did not seat properly. go figure.

    i was at first just thinking about using a heat gun over the pvc fitting hoping that would soften and weld it.. but this makes more sense...
  7. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Sep 2, 2004
    Retired Systems engineer for defense industry.
    New England
    Since the pvc fittings are tapered, depending on how much cement you use, you may have to hold it for awhile, otherwise, the pressure will push the pipe back out of the fitting. It can be very frustrating. Once it resolidifies, it works fine, but not if it pops back out maybe as much as half-way.
  8. lee polowczuk

    lee polowczuk New Member

    May 30, 2007

    I am guessing in my case, i didn't hold it long enough... i was in a crawl space doing 10-12 fittings... i forgot the quarter inch turn....

    probably lucky that more are not dripping...

    i'll tell you though... the advice on this board gave me the confidence and instruction to move a toilet...drill through 4 inches of concrete, run pvc, and tie into cast iron.

    used a core driller from home depot 70 dollars
    a soil pipe cutter from home depot 17 dollars
    pvc and fernco estimate 70 dollars
    flange 10 dollars
    tapcon screws 5 dollars
    primer and glue 10 dollars
    10 in rough in Cadet 3 right height 250 dollars
    pex and fittings for water supply 20 dollars

    this is the first phase of an overall master bath re-do.

    i'll have to re-do some more plumbing since i am tearing out a shower and putting in a whirlpool tub. i don't have a tub filler run... so i will make that 3/4" . i suspect the shower plumbing is 1/2 inch....

    what's funny right now is that i have two working johns in a 6x9 bathroom...
  9. Pewterpower

    Pewterpower New Member

    Jun 25, 2006
    At least you won't be lonely. You can invite a friend. :eek:
  10. Verdeboy

    Verdeboy In the Trades

    Jun 12, 2006
    If the spot-welding doesn't work, you can always try this stuff: They sell a version of it at Walmart.

    Attached Files:

  11. Master Plumber Mark

    Master Plumber Mark Master Plumber

    Feb 6, 2005
    Sensitivity trainer.. plumber of mens souls
    indianapolis indiana - land of the free, home of
    that looks like electrical tape....

    what will wall mart think of next.....

    I have cut MILES and MILES of home made
    electrical tape repairs off of water lines and
    drain lines......

    now someone thought up the great idea of acutally
    packageing the electircal tape and selling it for 5 times
    the price....

    its not the product that counts , its how you package it...
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