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Old 05-16-2017, 12:49 PM   #1
branimal
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Default Sweating copper near plumbers tape

I'm installing a tub filler in my bathroom reno. I think sweating the copper from the valve pictured below back toward the supply line will be the easiest way to make sure things line up.

My questions are:
1. Do I need to use plumbers tape on the male copper threads screwed into the valve. Pic below.

2. Will sweating the copper fittings melt the plumbers tape to the point it no longer holds the seal.



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Old 05-16-2017, 02:42 PM   #2
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solder the copper into the male before connecting to the valve.


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Old 05-16-2017, 04:35 PM   #3
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And yes, you will need teflon tape or thread sealer
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Old 05-16-2017, 07:46 PM   #4
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like Mr Matt suggested, sweat the adapter onto the pipe, let it cool then apply pipe dope to the threads and tighten with a wrench
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Old 05-16-2017, 08:50 PM   #5
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Will a wet rag on the pipe protect the teflon tape's Integrity for sweats further up the pipe?
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Old 05-16-2017, 09:36 PM   #6
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That will help, but I usually prefabricate as much as I can before I thread it on. If it's close quarters, be very careful how much heat you apply. Once solder starts flowing, that's enough. Also remove any rubber components from the tub filler before soldering
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Old 05-17-2017, 12:01 AM   #7
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Quote:
Originally Posted by Matt30 View Post
That will help, but I usually prefabricate as much as I can before I thread it on. If it's close quarters, be very careful how much heat you apply. Once solder starts flowing, that's enough. Also remove any rubber components from the tub filler before soldering


Yeah very tight spot. I think I'll use unions so I can tighten last fitting into place.

Good call on removing any rubber.
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Old 05-17-2017, 01:33 AM   #8
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If it's that close, would it be better / safer to adapt to pex
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Old 05-17-2017, 02:32 AM   #9
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Quote:
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If it's that close, would it be better / safer to adapt to pex


Code requires copper. Wish I could use pex
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Old 05-17-2017, 10:28 AM   #10
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I usually pre-fab shower head riser, the tub spout, and the hot cold parts.
then put it all together, hang the valve using 2 screws in the drop eared 90 on the shower head
then, hook up the hot/cold lines


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