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Evacuate water to solder pipes

Discussion in 'Plumbing and Central Heating' started by Geezas-Geeza, 3 May 2019.

  1. Geezas-Geeza

    Geezas-Geeza

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    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!
     
  2. OLLIE20

    OLLIE20

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    MAPP GAS and patience.
     
  3. dilalio

    dilalio

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    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. :)
     
  4. HERTS P&D

    HERTS P&D

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

    Andy
     
  5. durhamplumber

    durhamplumber

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

    Lower

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    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.
     
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  7. durhamplumber

    durhamplumber

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  8. durhamplumber

    durhamplumber

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    Hovis?
     
  9. Lower

    Lower

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    Warburtons. Maybe Hovis would have been better :)
     
  10. Gasguru

    Gasguru

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    Gluten free otherwise it sticks to the pipe wall.
     
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  11. endecotp

    endecotp

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    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?
     
  12. lostinthelight

    lostinthelight

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