Sweating copper pipe connected to PEX

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Old 12-18-13, 09:59 PM
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Sweating copper pipe connected to PEX

I want to sweat a threaded fitting on the end of a copper stub out pipe that is connected to PEX inside the wall. The stub pipe is about 4 to 6 inches in length.

Is this sufficient length to sweat the fitting without damaging the PEX?

Thanks!
 
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Old 12-19-13, 04:03 AM
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Wrap a wet rag around the far end of the stub. You should be OK.
 
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Old 12-19-13, 05:06 AM
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If your just installing a stop valve, why not just use a compression?
 
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Old 12-19-13, 06:48 AM
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PEX is so easy to work with I usually cut the PEX loose so there is no worry about the heat and just connect it back when the other plumbing has cooled.
 
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Old 12-19-13, 10:18 AM
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I would have detached the PEX initially but it's behind a finished wall and I don't want to cut the wall open. And I'm not a big fan of compression fittings.

I've seen the wet rag suggestion elsewhere so that's what I'll do.

Thank you all!
 
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