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Unable to break thread on toilet water supply valve

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Unable to break thread on toilet water supply valve billsahiker 08-10-2007
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Posted by willshak on August 10, 2007, 4:38 pm
on 8/10/2007 4:26 PM billsahiker@yahoo.com said the following:
> I can see exposed threads on the copper pipe. Could it still be
> soldered and not threaded?
>
Perhaps not on that end, but what about the top? Even if screwed in
there, there has to be a union fitting somewhere in the pipe above or
below the valve that unscrews apart so that the valve and pipe threads
can unscrew.
Look here for what the union looks like. If you don't have at least one
of these, cutting or unsoldering is the only answer.
http://pexsupply.com/categories.asp?cID=131&brandid=
The large nut in the center turns freely and unscrews the two ends. They
made be copper or brass, but they work the same way.

>> If you had to use a pipe wrench on the copper pipe, then it is not
>> screwed in, but soldered in, and no amount of turning will loosen it.
>> You'll have to cut the pipe below the valve and then unsolder the valve
>> from the top pipe before you can install a new valve, which may require
>> soldering or installation of pressure fittings. If you are not
>> comfortable with this, get a plumber.
>>
>> --
>>
>> Bill
>> In Hamptonburgh, NY
>> To email, remove the double zeroes after @
>>
>
>
>


--

Bill
In Hamptonburgh, NY
To email, remove the double zeroes after @

AppliancePartsPros.com, Inc.
Posted by willshak on August 10, 2007, 4:52 pm
on 8/10/2007 4:38 PM willshak said the following:
> on 8/10/2007 4:26 PM billsahiker@yahoo.com said the following:
>> I can see exposed threads on the copper pipe. Could it still be
>> soldered and not threaded?
>>

I didn't answer the question fully. Yes, the screwed in part could be
soldered in but that would be a hack job and is not usually done by
plumbers with the right fittings. Solder fittings involve soldering
directly with the copper pipe and and a valve made to accept soldered
copper pipe. See any silver around the threads?
> Perhaps not on that end, but what about the top? Even if screwed in
> there, there has to be a union fitting somewhere in the pipe above or
> below the valve that unscrews apart so that the valve and pipe threads
> can unscrew.
> Look here for what the union looks like. If you don't have at least
> one of these, cutting or unsoldering is the only answer.
> http://pexsupply.com/categories.asp?cID=131&brandid=
> The large nut in the center turns freely and unscrews the two ends.
> They made be copper or brass, but they work the same way.
>
>>> If you had to use a pipe wrench on the copper pipe, then it is not
>>> screwed in, but soldered in, and no amount of turning will loosen it.
>>> You'll have to cut the pipe below the valve and then unsolder the valve
>>> from the top pipe before you can install a new valve, which may require
>>> soldering or installation of pressure fittings. If you are not
>>> comfortable with this, get a plumber.
>>>
>>> --
>>>
>>> Bill
>>> In Hamptonburgh, NY
>>> To email, remove the double zeroes after @
>>>
>>
>>
>>
>
>


--

Bill
In Hamptonburgh, NY
To email, remove the double zeroes after @

Posted by on August 10, 2007, 5:23 pm
The copper pipe is definintely threaded and I see no evidence of
solder. The uniion is not copper -silver colored so some sort of
alloy. Someone else suggested the threads are corroded, which makes
sense to me. Having been around boats alot I know about galvanic
corrosion. In this case, the alloy would have corrorded and seized the
joint. I am starting to think I need a plumber.

Bill


Posted by valvejob on August 11, 2007, 10:41 am
On Fri, 10 Aug 2007 14:23:54 -0700, billsahiker@yahoo.com wrote:

>The copper pipe is definintely threaded and I see no evidence of
>solder. The uniion is not copper -silver colored so some sort of
>alloy. Someone else suggested the threads are corroded, which makes
>sense to me. Having been around boats alot I know about galvanic
>corrosion. In this case, the alloy would have corrorded and seized the
>joint. I am starting to think I need a plumber.
>
>Bill

Yes, you need someone, either yourself or a plumber, to cut off the
joint and put on a new copper threaded joint as shown below in this
thread.

Do not twist off and ruin the pipe!



Posted by on August 10, 2007, 4:44 pm
On Aug 10, 4:26 pm, billsahi...@yahoo.com wrote:
> I can see exposed threads on the copper pipe. Could it still be
> soldered and not threaded?

If it's threaded copper PIPE (like iron pipe, except made from
copper), and not the more common copper tubing (which is soldered),
then you can probably forget about ever getting that valve off. The
steel and copper and moisture created galvanic corrosion that has
permanently welded the two together.

Make sure you're seeing what you think you're seeing. Could this valve
be attached to the copper via a compression fitting? Then you'd need
to turn the nut one way and the valve the other.


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