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 how to get water out of copper pipe to solder it properly
Author: catpace (OH)

All the soldering with the copper pipes has been going ok. But theres one pipe that seems to be giving us a problem. How do you solder the copper pipe with water in it. We have tried sucking the water out with a straw..but that didnt seem to work. It will not solder with even the slightest amount of water.
Hope you can help,

thanks



Edited 1 times.

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 Re: how to get water out of copper pipe to solder it properly
Author: LemonPlumber (FL)

Nope make a bread ball and stuff it up into the pipe to keep the solder joint dry!

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 Re: how to get water out of copper pipe to solder it properly
Author: Shoemaker2 (MA)

Whenever there is water or any moisture in the pipe steam will develop and pressurize the pipe so the solder can't flow in. You need to have an open end in the line somewhere that will let the pressure out as you are heating the pipe. Water in piping is a challenge even for well seasoned technicians, so don't feel bad.
Another thing they may help is suck back on the piping at a low point to get that standing water out of the system, of blowing it out with compressed air.

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 Re: how to get water out of copper pipe to solder it properly
Author: jerco (MD)

When the water, left inside the pipe, wants to pool at the point that I'm trying to solder, I will find another place to pull the pipe down so that it is the lower point. Usually about 5 feet away, or more if possible, in the direction from which the water is coming.

Good luck.

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 Re: how to get water out of copper pipe to solder it properly
Author: waukeshaplumbing (WI)

sounds like a built up pressure problem..open a valve somewhere or faucet

mapp gas works better too.

could be the torch your using

if all else fails use a sharkbite

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 Re: how to get water out of copper pipe to solder it properly
Author: dlh (TX)

i like to use a wet-vac and then solder as quick as possible

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 Re: how to get water out of copper pipe to solder it properly
Author: PBwrencher (WI)

I open a faucet above it and open one below after I take the joint apart then I drain as much water out as possible by moving the pipe up and down as much as will allow. Next I clean the joints to a shine and prepare the fitting. Last, I move the pipe up and down, drain again, in case of anymore water settling in it, then flux and solder in a speedy manner.:)



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 Re: how to get water out of copper pipe to solder it properly
Author: sieradeby84 (CA)

Hi..
You can try the bread thing but you need to drain the system first. Once the main shutoff valve is closed opening fixtures below and above the fitting will allow it to drain. If you are in the crawl space prepare to get wet or use a bucket as the fixture won't drain anything below them. If you are cutting into just the hot or cold then shut off the hot water tank valve so water doesn't syphon out and thus taking longer to drain. If electric water heater turn it off at the circuit breaker so the elements don't burn out in case it does syphon. Make sure the solder flows all way around the fitting and drips off the bottom. If it doesn't take then water is still in there (it doesn't take much). Make sure you are confident in your joints or you will have to repeat the whole process over if it leaks.



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 Re: how to get water out of copper pipe to solder it properly
Author: dlh (TX)

i have never turned the water heater valve off because they usually do not siphon

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PLUMBERS "Protecting The Health Of The Nation"

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 Re: how to get water out of copper pipe to solder it properly
Author: LemonPlumber (FL)

Dlh the heater can be a problem if it is heating the water.

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 Re: how to get water out of copper pipe to solder it properly
Author: dlh (TX)

having a faucet open will stop that problem

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PLUMBERS "Protecting The Health Of The Nation"

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 Re: how to get water out of copper pipe to solder it properly
Author: LemonPlumber (FL)

True .if the joint is above the open fixture . draining a little water off the tank works too.

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