Evacuate water to solder pipes

Geezas-Geeza · 3 May 2019

Hi Guys,

I have experienced this a few times now. I turn off the mains, do the relevant cuts, allow water to drain, but there are still very small amounts of water coming out of the pipe. This makes soldering the pipe impossible, so I end up having to use a compression fitting instead, which works, but is sub-optimal.

Does anyone have any tricks to stop the flow completely so I can get a decent joint on the pipe ?

I just came across the Jet Swet tool, but that looks like it might be difficult to get into tight spaces and it does not appear to do bends/corner joints. I read about someone using some bread but not sure if that'll actually work ? anyone tried it ?
Do share any other tricks/techniques you have!

OLLIE20 · 3 May 2019

MAPP GAS and patience.

dilalio · 3 May 2019

Pipe slices leave a tapered rim on the inside of the cut pipe. Get rid of this using a deburring tool or small round file (down into the pipe - especially at the bottom) or use a junior hacksaw. Then apply downward pressure on the horizontal pipe end (as much as is possible) and the standing water at the bottom of the pipe will run out easier.

Or use a wet vac.

Apply heat to the open end, before putting the fitting on... This will draw any water toward the heat which gets a bit more out.

Take out a section of pipe and do the lowest joint first... The higher joint, whilst open, will provide a vent for steam to escape during heating of the lower joint and should leave you with a water free joint when you come to do the higher one.

And... As long as there's not too much water coming at a joint, it will eventually take, as @OLLIE20 says above.

Enjoy.

HERTS P&D · 3 May 2019

Bread.................................I'll let you youtube it.

Andy

durhamplumber · 3 May 2019

Geezas-Geeza said:
Hi Guys,

I have experienced this a few times now. I turn off the mains, do the relevant cuts, allow water to drain, but there are still very small amounts of water coming out of the pipe. This makes soldering the pipe impossible, so I end up having to use a compression fitting instead, which works, but is sub-optimal.

Does anyone have any tricks to stop the flow completely so I can get a decent joint on the pipe ?

I just came across the Jet Swet tool, but that looks like it might be difficult to get into tight spaces and it does not appear to do bends/corner joints. I read about someone using some bread but not sure if that'll actually work ? anyone tried it ?
Do share any other tricks/techniques you have!

Tip the pipe up,,use tubing to either blow or siphon water out.

Lower · 3 May 2019

HERTSDRAINAGE2010 said:
Bread.................................I'll let you youtube it.

Andy

I've had to do the bread trick.

I then had to remove and clean and the aerators on the taps and a thermostatic mixed valve to clear our partially dissolved bread

Should have thought to run the bread out through one tap before any other taps were used.

durhamplumber · 3 May 2019

durhamplumber · 3 May 2019

Lower said:
I've had to do the bread trick.

I then had to remove and clean and the aerators on the taps and a thermostatic mixed valve to clear our partially dissolved bread

Should have thought to run the bread out through one tap before any other taps were used.

Hovis?

Lower · 3 May 2019

Warburtons. Maybe Hovis would have been better

Gasguru · 3 May 2019

Gluten free otherwise it sticks to the pipe wall.

endecotp · 3 May 2019

Depending in the orientation of the pipes you may be able to siphon the water out; feed a thin plastic tube in, suck to get it started.

If the flow is too fast for that to work... do you need to fix your stopcock?

lostinthelight · 4 May 2019

I have found that a wet vac over the nearest open tap pulls the water away from where ones soldering

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Evacuate water to solder pipes

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