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Patching a toilet lead bend leak

branimal

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May 31, 2016
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1,943
I found a leak at my parents house. There's a small hole in the lead bend under their toilet. I don't have time to replace the lead bend today. What is the best epoxy or other sealer I can use.

How long can I expect the repair to last?
 

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nadogail

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I have used JB Water Weld to patch shower stalls and washing machines. It is a two part epoxy in stick form, you knead the two parts together and press it on. It dries to an "Off White" color it can be sanded and painted.
 

KEH

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Jan 31, 2010
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Carefully sand to bare metal, prepare epoxy, apply generously to area. Be careful not to push in the leaking area while sanding or other work since the metal probably has corroded to where the metal is thin.

KEH
 
OP
B

branimal

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May 31, 2016
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I have used JB Water Weld to patch shower stalls and washing machines. It is a two part epoxy in stick form, you knead the two parts together and press it on. It dries to an "Off White" color it can be sanded and painted.
I've used a knock off brand water-weld epoxy on a water heater galvanized pipe. I didn't seal up the hole 100%. There was a slow leak. Obviously that water pipe is under pressure and my lead bend is not.

I wonder if a 2-part liquid epoxy like JB-Weld Marine epoxy would be a more permanent solution.



 

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PoorUB

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Clean it up with sandpaper and use what ever epoxy you can find. It isn't rocket science and the leak is not under pressure. The regular JB Weld will do just fine.
 
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kbs2244

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Nov 11, 2006
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J B with a 2 x 2 pop can metal square under a piece of tightened wire to hold it in place
the only time there is water there is when there is a flush
 

CraigStu

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May 22, 2014
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Location
Blacksburg, Va
The JB in the small toothpaste tubes ends up being pretty thin once mixed. Think mayonaise vs thick peanut butter. I point this out because it will run right off that pipe unless restrained somehow. I love JB but that is a weakness of that type. I have not tried the two semi solid type that you knead together. I wonder if you could use some type of gauze wrapped around it and the JB slathered on. JB, gauze, JB gauze, JB. If you can work that out I would consider it dang near a permanent repair-see I said I like JB. I would expect the JB to last nearly forever but the metal an inch or two away to develop a leak.
 

rlitman

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J B with a 2 x 2 pop can metal square under a piece of tightened wire to hold it in place
the only time there is water there is when there is a flush
When there's no water, it needs to be gas tight to keep out sewer gasses.

I had the same problem with a lead bens when I bought my house. I mixed up the full contents of a pair of small cans of PC-7 epoxy (a cup or so) and slapped that over the bend. Liquid epoxy will run down and drip. PC-7 has a peanut butter consistency that you can slap on with a gloved hand. It lasted 12 years until I decided to put a ceiling under it, and just to be safe I replaced the whole thing with PVC, but I'm sure it would have been fine for far longer.

Using a soda can and some wire is a good idea, but regular JB is still far to runny for this.

DO NOT TRY the rubber sheet and hose clamps. Lead is WAY too soft for this. You'll crush it and have a much bigger problem.
 
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