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 Copper pipe fitting
Author: sum (FL)

Trying to take apart the supply lines to run the pipe outside the wall where I already had the holes drilled as shown in the pic.



not sure what type of fitting on the lower left. Looks like a compression coupling?





I am inclined to take that apart and replace it with a regular coupling. But all the joints are soldered except this one makes me wonder if there is a good reason this fitting is used here? There is green stain above and below it is this from flux?



Edited 1 times.

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 Re: Copper pipe fitting
Author: packy (MA)

that's a compression fitting the same as the shut off has.
possibly the water didn't shut off all the way so the plumber used one of those.
a soldered coupling would be the best for that. unscrew it with 2 wrenches to determine if there is a shut off not holding. if you replace the fitting it is ok to leave the bottom nut and ferule there. just grease it up and tighten on a new compression union.
or, cut the pipe below it, shop vac out the water and solder on a coupling. if you have real trouble just use a new compression union.

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 Re: Copper pipe fitting
Author: sum (FL)

Packy I have already replaced the old stuck rusted shutoff with a new full port ball valve so I know it will shutoff.

I will try a solder a coupling there. I am worried the pipe is out of round and there is a very short piece to work with.

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 Re: Copper pipe fitting
Author: packy (MA)

if it were out of round, the compression union would not have sealed.

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 Re: Copper pipe fitting
Author: sum (FL)

well I took the compression coupling apart but the pipe was "strangled" by the ferrule so I had to cut it off. I finished the rerouting to the outside and put together the bibs.



However, in an adjacent area I am running into a bit of a problem, potential problem. The hot and cold here are also going to be "dead ended", so I will run them to the outside.

However, after taking apart all the tees and elbows and soldered on a coupling, I noticed there is a "dent" in the existing 3/4" copper pipe right under the new coupling I put on. I didn't see it initially because there was paint/grout smear over it, it's not until I sanded it clean to prep it for soldering that I noticed it.

It's not leaking. But it looks like a hole. May be someone tried to drive a nail through it when installing baseboards?







Should I leave it alone or should I take the coupling off, cut the pipe lower and remake that joint? I am always a bit worried when it comes to cutting soft copper pipe too close to the slab where it may be a bit curved and tricky to solder.



Edited 1 times.

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 Re: Copper pipe fitting
Author: steve (CA)

If you remove the existing coupling, you could sweat a slip coupling over the dent and then resweat the removed pieces.

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 Re: Copper pipe fitting
Author: packy (MA)

or, you could cut the copper at the bottom of that dent, use a swaging tool to make the male end of the copper into a female end, clean the inside of that female end really, really well, flux it up and insert a piece of tubing into it. you will have a nice upright joint to solder...



Edited 1 times.

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