3/4 in ball valve sweat


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Old 04-20-20, 01:25 PM
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3/4 in ball valve sweat

I just installed a 3/4 ball valve sweat and it is leaking. It is leaking at the seam. Is there a way to fix it. I tried to tight in but no help.
 
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Old 04-20-20, 02:11 PM
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Possibly you applied too much heat, too long, and cooked it.
 
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Old 04-20-20, 02:36 PM
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See step 10 in this video. They also suggest soldering with the valve open and using solders with lower temp melting points.
 
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Old 04-20-20, 03:09 PM
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Once it's sweated in place.... there is no way to tighten it.
You'd have to take it out to tighten it up..... or at least unsolder one end.
 
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Old 04-21-20, 04:18 AM
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OK I have never done this on a fitting like this so it is a bit of a shot in the dark.

Get a strip of thin rubber or something like rubber etc. In my case I used Nalgahide, I think that is what it is called. It was left over from a snowmobile seat re-cover project. In the old days we always had inner tubes.
Wrap it around the fitting a couple times.
Then put a clamp over it and tighten it up.
Might save you from having to unsolder everything.
Note that I would check that the ball valve is actually shutting off properly before doing anything.
 
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Old 04-21-20, 04:54 AM
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When sweating any kind of valve, you remove the innards so the heat doesn't cook the seals. That is what I think you did. Remove and replace valve.
 
 

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