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Old 03-04-2009, 09:33 PM   #1
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Toilet Valve


Our plumber replaced the existing valve on the toilet water line. We have copper water pipes. There has been a small leak (a few drops a day) in the valve, and now green patina on the pipe. Is this only because of the leak, or do you think the wrong valve was installed?

Thanks for the advice.
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Old 03-04-2009, 10:01 PM   #2
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Toilet Valve


No, its not the wrong valve. However it is hard to see if it is a threaded stop, a sweat stop, etc. If any soldering was done on the pipe then the most likely cause of the green is from not wiping the pipe clean of the flux once the soldering was finished.

Where is the leak coming from? Is it the solder joint itself or is it coming from the packing nut behind the handle? If its the packing nut, just snug it up a bit and the leak should stop.


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Old 03-04-2009, 10:07 PM   #3
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Toilet Valve


No, I can't see the pic very well but it looks like a 1/2npt to 3/8comp angled valve.

Sometimes when these valves are replaced the threads don't seal up properly.

I would get a 1/2"or 5/8nominal compression to 3/8compression angled valve.
Get some emery cloth. Shut off main water, shut off toilet valve, remove connection line to toilet and relieve the pressure in the lines then take the emery and clean the pipe, then use a pipe cutter and cut the pipe close to the existing fitting and when the fitting is cut slide on the new valve and tighten the compression fitting and reconnect the toilet

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Since the plumber was there and you paid for a service call him/her back out.
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Old 03-04-2009, 10:14 PM   #4
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Toilet Valve


not sure if you can see anything more in this enlarged photo...
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Old 03-04-2009, 10:16 PM   #5
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Toilet Valve


Is the photo upside down?
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Old 03-04-2009, 10:24 PM   #6
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Toilet Valve


The photo was taken standing at the front of the toilet and looking down on the valve/pipe.

I don't think any soldering was done. He used plumber's tape, and then put plumber's putty to try to stop the leak. It stopped for a few days, but then started again. The leak is coming from the joint between the valve and the pipe (hope that makes sense).

I will call the plumber back, but want to be sure that I know what he should do to fix the problem.

Thanks again for your comments.
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Old 03-05-2009, 02:41 AM   #7
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Toilet Valve


Yeah, he needs to remove the valve, retape/redope/both the threads then reinstall the valve. I dont care for threaded stops myself, especially on a copper male adapter. A 5/8" X 3/8" compression stop is just too easy to use.

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