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Old 07-21-2014, 03:41 PM   #1
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Need a Plumber's advice

Doing repairs from tire blowout damage, and glued new sewer outlet into the large "Y" outlet after grinding out the remaining piece of broken pipe. Of course couldn't get a perfect fit after the grinding, but figured the ABS glue liberally applied would seal the two pipes together, but it didn't.

What do I do now short of starting all over again with all new pipe?
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Old 07-21-2014, 03:49 PM   #2
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You may be able to use the rubber union fittings you can get at Home Depot or Lowe's. They have stainless steel clamps and fit over the pipe. Worth a look anyway, plumbing is often a lots of looking at stuff job.
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Old 07-21-2014, 05:01 PM   #3
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More glue, or make a heavy paste with abs shavings and MEK. Apply over the leak and let dry, then repeat.
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Old 07-21-2014, 05:05 PM   #4
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Originally Posted by SteveH View Post
Doing repairs from tire blowout damage, and glued new sewer outlet into the large "Y" outlet after grinding out the remaining piece of broken pipe. Of course couldn't get a perfect fit after the grinding, but figured the ABS glue liberally applied would seal the two pipes together, but it didn't.

What do I do now short of starting all over again with all new pipe?
A photo of what you are asking about might get some detailed answers.
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Old 07-21-2014, 06:16 PM   #5
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I believe ABS can be welded. It's thermoplastic. Someone more skilled than I could possibly weld the new to the old. I have repaired polyethylene tanks using a plastic extruder. It melts in the 300 degree range.

If you are really ambitious, you could replace the entire dump valve manifold. It's not too expensive, just a bunch time consuming. You have to remove the big tank cover. Here is a photo of mine before and after. The ABS fittings are slip fit into the waste water tanks with a little caulk and a hose clamp. Airstream built mine that way. Reason for the project, I had leaky dump valves that needed replaced.

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Old 07-21-2014, 06:46 PM   #6
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Rough it up real good with some 36 grit sandpaper and epoxy the hell out of it.

It will stay together, and if you do a good job it wont leak.


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Old 07-21-2014, 07:29 PM   #7
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More glue, or make a heavy paste with abs shavings and MEK. Apply over the leak and let dry, then repeat.
Thanks, with what little experience I have working with ABS, this does sound like the right approach.

Thinking it would work really well if I could inject this thru a tube into the void with some sort of syringe. Any ideas on that?
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Old 07-23-2014, 02:51 PM   #8
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It seems to be fixed

Since I could see a couple of voids on the sides between the fitting and the pipe, I decided to try and fill them with ABS. I used a carpenter's hand plane to carve a couple of thin slivers of plastic off of a piece of ABS pipe I had laying around, slid them into the voids, and then applied more glue paying special attention to the void areas. Put two more coats of glue on it, let dry for a day, then tested it a while ago, and fortunately, no leaks.

Thanks for everyone's help and suggestions.
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Old 07-23-2014, 04:47 PM   #9
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Glad you got it fixed. The rubber with stainless hose clamps are called mission bands & come in many sizes, they are a great help in difficult repairs & they last in ground for many years as I have some over 35 yrs. in ground.
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Old 07-23-2014, 05:48 PM   #10
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Glad you got it fixed. The rubber with stainless hose clamps are called mission bands & come in many sizes, they are a great help in difficult repairs & they last in ground for many years as I have some over 35 yrs. in ground.
I've had the same results where they are buried. Do you have experience where the rubber fittings are exposed to UV? I used a 3" Fernco coupling to repair the ABS waste on my Safari last year. It's exposed below the belly pan.
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Old 07-23-2014, 06:21 PM   #11
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I looked for a rubber coupling, but they are all sized to fit over pipe, and I could not find one sized correctly to fit over the fittings. Everything was either too small, or too big.

I'm happy with what I did, and think it will work well long term.
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Old 07-23-2014, 08:40 PM   #12
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Wa La! Another Airstream back on the road. I imagine the adhesive "melted" the chips you forced into the voids making a solid joint.

David
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Old 07-23-2014, 08:41 PM   #13
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I looked for a rubber coupling, but they are all sized to fit over pipe, and I could not find one sized correctly to fit over the fittings. Everything was either too small, or too big.

I'm happy with what I did, and think it will work well long term.
Hope it holds up for you!
Just last week I had to do something similar to what you did, on a low pressure 1-1/4" pvc pumped waste line. Had to chip a broken pipe out of a female fitting. Not easy to do but it can be done successfully.
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