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Tool Talk Discussion Forum

Repairing in the floor heat

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Roger in Wisconsin

02-09-2018 14:10:20




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My neighbor was finishing his basement. While he was setting walls he drilled through the concrete into the copper tubing. We were able to isolate the basement zone and chiseled out around the area. We plan to solder in a splice. I figure that concrete will be a heat sink that could make soldering difficult. Any suggestions? Thanks




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Lester Isby

02-10-2018 10:58:32




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 Re: Repairing in the floor heat in reply to Roger in Wisconsin, 02-09-2018 14:10:20  
I with David G on this.



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dr sportster

02-10-2018 08:20:49




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 Re: Repairing in the floor heat in reply to Roger in Wisconsin, 02-09-2018 14:10:20  
I've seen a plumber take a brass screw off an electrical outlet and solder it into the hole.



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joe 55 joe

02-09-2018 20:41:02




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 Re: Repairing in the floor heat in reply to Roger in Wisconsin, 02-09-2018 14:10:20  
Give it about 3 in. Of room on both sides of solder joint you wont have any problems. Ive fixed many that people have drilled thru by soldering.



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David G

02-09-2018 18:02:55




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 Re: Repairing in the floor heat in reply to Roger in Wisconsin, 02-09-2018 14:10:20  
After thinking about this, I would put a piece of PEX in the middle with compression fittings on the copper.



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da.bees

02-09-2018 16:39:23




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 Re: Repairing in the floor heat in reply to Roger in Wisconsin, 02-09-2018 14:10:20  
I would put a brass screw in the hole and silver braze it. Water that remains' in tube will have more effect on repair than the concrete. I've made solder joints hundereds of times where pipe come's out of concrete slab.



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johnlobb

02-09-2018 15:06:16




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 Re: Repairing in the floor heat in reply to Roger in Wisconsin, 02-09-2018 14:10:20  
You need to remove enough of the concrete to where you can get enough heat to get the solder to take. A copper "repair" coupling is a coupling without a stop built in to it. You can cut the tube, and lift one end up to slip the coupling over, then push that end down to line the 12 ends up, then slip the coupling over the cut ends, and solder. obviously, test before you cement up the hole. Good luck.

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David G

02-09-2018 14:57:29




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 Re: Repairing in the floor heat in reply to Roger in Wisconsin, 02-09-2018 14:10:20  
That is the first time I have heard of using copper in 20 years, I thought copper will corrode in concrete.

Just solder or shark bite in a replacement.



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johnlobb

02-09-2018 18:56:53




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 Re: Repairing in the floor heat in reply to David G, 02-09-2018 14:57:29  
David, it depends how the concrete was formulated. If fly ash was used, the mix will corrode the copper, it not, usually no problem. Fly ash from a coal burning powerhouse is highly acetic. It used to be used as a filler in concrete. It was only discovered about 15 years ago that fly ash caused this. and yes, most PEX is desirable today, but not with compression fittings below concrete.



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Bob Harvey

02-09-2018 16:52:32




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 Re: Repairing in the floor heat in reply to David G, 02-09-2018 14:57:29  
Did a house in Alberta MORE than 20 yrs. ago, and they used 3/4" copper on a 16" spacing. I questioned the longevity, but no one seemed to care.



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Roger Tomfohrde

02-09-2018 14:54:50




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 Re: Repairing in the floor heat in reply to Roger in Wisconsin, 02-09-2018 14:10:20  
Or braze it with a silphos-copper rod. Surprise me because usually that is plastic PEX pipe.



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RM-MN

02-09-2018 14:16:59




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 Re: Repairing in the floor heat in reply to Roger in Wisconsin, 02-09-2018 14:10:20  
Look for "shark bites". Slip them onto clean tubing and they seal with no leaks.



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