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Old 08-01-2010, 02:42 PM   #1
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Best method to repair leak in main supply (PVC)


I have a small leak in the main supply between the meter and the main shutoff. The problem is around the middle of the run at a joint between two pipes. The pipe is about 12" underground (I live in FL).

The issue is that the line is directly under a brick walkway. I have the spot where the leak is excavated but I'd like to avoid removing large amounts of brick.

The helpful folks at ACE suggested a compression coupling like this.
http://tiny.cc/Compression_Coupling

I'm curious if this is the best fix. I'm afraid that this solution may fail in a few years and I'll be back where I started.

Thoughts and suggestions are greatly appreciated.

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Old 08-01-2010, 04:36 PM   #2
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Best method to repair leak in main supply (PVC)


You're better off using a glue repair coupling or two. By "joint" do you mean coupling?

If the break is in a coupling you'll need to cut out a section 4" long or so and replace it with a small stub of pipe and your 2 repair couplings.

If the leak is in the pipe, and small enough, you may be able to just cut right in the center and use just one coupling.

Either way is simple and cheaper than a compression coupling.

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Old 08-01-2010, 07:00 PM   #3
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Best method to repair leak in main supply (PVC)


I'd have to trench out 10' or so in brick paver to gain enough flex to repair with glue couplings.
At least I think I would.. not much play here. Currently I have about 18" of pipe exposed.

The pipes in the ground have a male and female end rather than couplings. The crack is in the bevel of a female end.

I'll have to take out a 6 inch section to remove the joint. My plan is to use a glue coupling, a short stub and a compression coupling. This method should take up about 2hrs of my Monday morning including clean up and repair of the walk.

If I have to trench up the walk to gain flex I'd almost be better off ripping out the whole run. It's only about 50ft and I'd have the walk most of the way torn out.

Actually a better option would be to run a new line that is not under the walk...

Does all this make sense?

Last edited by vintagewolf; 08-02-2010 at 02:06 AM.
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Old 08-02-2010, 07:27 AM   #4
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Best method to repair leak in main supply (PVC)


Quote:
Originally Posted by vintagewolf View Post

I'll have to take out a 6 inch section to remove the joint. My plan is to use a glue coupling, a short stub and a compression coupling.
Your method will work fine. If you want to use glue couplings, they make repair couplings that do not have a stop in the middle. You can slip it totally over the end of the pipe to get your alignment. Probably will not find at a big box but a plumbing supply house will carry them.
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Old 08-02-2010, 02:08 PM   #5
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Best method to repair leak in main supply (PVC)


Quote:
I'd have to trench out 10' or so in brick paver to gain enough flex to repair with glue couplings.
At least I think I would.. not much play here. Currently I have about 18" of pipe exposed.
That is plenty of room to make your repair. As rjniles mentioned, a repair coupling won't have the little stop in the middle. So you can cut out your 18" section, cut a new piece to fit, primer all sides, then lather up your couplings and pipe good with some Hot Stuff (pvc cement), then slap it together quick.

Slide the couplings all the way onto the pipe, put your new piece in, and slide them back down. Again, work quickly.
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Old 08-02-2010, 03:10 PM   #6
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Best method to repair leak in main supply (PVC)


I've used these "slip fix" fittings at work on PVC irrigation line fixes. Work great, no worries about getting enough flex on the lines and the fittings are quite forgiving (if you were to cut a bit too much out).

http://www.howcast.com/videos/336109...ip-Fix-Fitting
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Old 08-03-2010, 10:14 AM   #7
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Best method to repair leak in main supply (PVC)


Thanks for everyone's advise. I have never worked with slip couplings before. So what I ended doing was a little different. I'll describe it with as mush detail as possible in case it helps someone out there.

My supply house did not have a slip repair coupling for 3/4 but they advised me that one could be fabricated by removing the stop from a standard one.

I used a half-round file and sandpaper to remove the ring.
Sanded my new piece of pvc some so that I could more easaly slide the coupling onto it.
Marked the new pvc where the slip coup should be when finished.
Slid the slip coupling onto the new section of pvc and past the end ~3/4"
Tested the fit.
I found that priming the side with the slip coupling did not work and the coup got stuck. With all the sanding I think it's fine.
I did prime the side that had a standard coupling. Glued up this side first .
Let that set for a few minutes.
At this point I am ready to glue the slip-coup.
I smeared cement on both pieces of pipe where the coupling would rest and slid it on down to my mark.
Wipe up any excess cement and let it set for a couple hours.
Came back to test and all is well.
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Old 08-03-2010, 08:35 PM   #8
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Best method to repair leak in main supply (PVC)


Nice job! I like your ingenuity

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