1. Visiting from the US? Why not try DIYnot.US instead? Click here to continue to DIYnot.US.
    Dismiss Notice

Flushing solution

Discussion in 'Plumbing and Central Heating' started by DIYspanner, 8 Jan 2020.

  1. DIYspanner

    DIYspanner

    Joined:
    17 Apr 2007
    Messages:
    1,642
    Thanks Received:
    56
    Country:
    United Kingdom
    I have a gunged kitchen sink drain pipe.

    There's 3 bends in it so no chance of a wire being pushed through it.

    I had the idea of bunging the out flow and filling the pipe with some solution, leaving it for a few hours to soften the gunge that's stuck to the sides, then flushing through with hot water.

    Can anyone recommend a solution that can soften/dissolve gunge please?
     
  2. Sponsored Links
  3. Mottie

    Mottie

    Joined:
    27 Feb 2017
    Messages:
    4,752
    Thanks Received:
    535
    Location:
    Essexshire
    Country:
    United Kingdom
    I use the own brand drain cleaner that you get in Sainsbury. Can’t you remove the bends/trap and clean them out manually?
     
  4. DIYspanner

    DIYspanner

    Joined:
    17 Apr 2007
    Messages:
    1,642
    Thanks Received:
    56
    Country:
    United Kingdom
    The lead off to the external drain has three bends, two of them being on the opposite sides of the external wall and the pipe run is glued.

    If I can get a string run through using water flow, I can then pull a length of thin rope through, with a metal washer tied to it, pull it forwards/backwards to dislodged to gunk. That's the theory at least.
     
  5. HERTS P&D

    HERTS P&D

    Joined:
    9 Apr 2010
    Messages:
    8,903
    Thanks Received:
    1,274
    Location:
    Hertfordshire
    Country:
    United Kingdom
    Post a picture of the pipe work and i will tell you how to unblock it.

    Andy
     
  6. DIYspanner

    DIYspanner

    Joined:
    17 Apr 2007
    Messages:
    1,642
    Thanks Received:
    56
    Country:
    United Kingdom
    Photos as requested

    The water runs away and I've got the straight section off the U bend cleaned out. Its rest of the black pipe I want to de-gunge.

    [​IMG]

    [​IMG]
     
  7. The Novice

    The Novice

    Joined:
    26 Sep 2019
    Messages:
    1,688
    Thanks Received:
    474
    Location:
    North
    Country:
    United Kingdom
    If it’s only scum, then soda crystals and boiling hot water work well. A wire spring would get round those bends, done it loads of times.
     
    • Thanks Thanks x 1
    • Like Like x 1
  8. Sponsored Links
  9. DIYspanner

    DIYspanner

    Joined:
    17 Apr 2007
    Messages:
    1,642
    Thanks Received:
    56
    Country:
    United Kingdom
    So if I block the pipe's exit outside, fill the sink with hot water, add soda crystals, then let it run down and fill the pipe, leave it for an hour or so, the gunge will be dissolved?
     
  10. The Novice

    The Novice

    Joined:
    26 Sep 2019
    Messages:
    1,688
    Thanks Received:
    474
    Location:
    North
    Country:
    United Kingdom
    You could do it like that, however could be an issue with expansion. No need to block the outlet, Just follow instructions on packet, I think it’s half a bag, followed by the water.

    Edit: make sure you seal your hole in the wall (around the wastepipe) with some sand & cement.
     
  11. HERTS P&D

    HERTS P&D

    Joined:
    9 Apr 2010
    Messages:
    8,903
    Thanks Received:
    1,274
    Location:
    Hertfordshire
    Country:
    United Kingdom
    Remove the trap where it joins the black pipe then use a wet vac and suck it out. Then reconnect the trap and run hot water for 10 minutes.

    Andy
     
    • Like Like x 1
  12. DIYspanner

    DIYspanner

    Joined:
    17 Apr 2007
    Messages:
    1,642
    Thanks Received:
    56
    Country:
    United Kingdom
    All done!

    Did all the sinks in the house with soda while I was on.

    Just need a couple of new sink plug/strainers for the kitchen sink. The balls have drop out of the stems so need to hold them up to drain any water off.

    Noted about cementing the pipe in the outside wall.

    Thanks All for posting.
     
    • Like Like x 1
  13. The Novice

    The Novice

    Joined:
    26 Sep 2019
    Messages:
    1,688
    Thanks Received:
    474
    Location:
    North
    Country:
    United Kingdom
Sponsored Links
Loading...

Share This Page