Soil stack leak

Discussion in 'Plumbing and Central Heating' started by Mr Sparkle, 23 Dec 2021.

  1. Mr Sparkle

    Mr Sparkle

    Joined:
    17 Dec 2018
    Messages:
    395
    Thanks Received:
    5
    Country:
    United Kingdom
    Internal soil stack is leaking when toilet, basin or bath used (upstairs bathroom).

    The leak appears to be happening above the base

    When the downstairs kitchen and washing machine is in use, everything is fine

    Opened the manhole and water is flowing (although slightly slower)

    The white pipe in the pic, is from the kitchen sink

    Could this be a blockage that a set of drain rods can handle?
     

    Attached Files:

  2. Sponsored Links
  3. Hugh Jaleak

    Hugh Jaleak

    Joined:
    3 Feb 2008
    Messages:
    7,659
    Thanks Received:
    1,851
    Location:
    Northamptonshire
    Country:
    United Kingdom
    If it's leaking, it's because there is a defective seal somewhere, regardless of whether it is blocked or not, leak still needs sorting. I would be surprised if it is actually blocked, as you say it only leaks when a discharge is made above, (if blocked it would leak when kitchen, washing machine, etc are being used.)

    Looks a pig to get to though....
     
    • Like Like x 2
    • Thanks Thanks x 1
  4. Mr Sparkle

    Mr Sparkle

    Joined:
    17 Dec 2018
    Messages:
    395
    Thanks Received:
    5
    Country:
    United Kingdom
    The leak appears to be coming from the part I have marked up.

    What is this and is it an easy fix?
     

    Attached Files:

  5. CBW

    CBW

    Joined:
    26 Sep 2019
    Messages:
    11,479
    Thanks Received:
    3,176
    Location:
    North
    Country:
    United Kingdom
    It’s a bossed connection. Is/was there anything to it or just open ended?
     
    • Like Like x 1
  6. Hugh Jaleak

    Hugh Jaleak

    Joined:
    3 Feb 2008
    Messages:
    7,659
    Thanks Received:
    1,851
    Location:
    Northamptonshire
    Country:
    United Kingdom
    That is a 'Boss' connection. Unfortunately there is no easy fix, the internal seal where the waste pipe goes in had probably perished and if the pipe has been removed, it is very unlikely to seal again.

    The only real solution is to replace that section of pipe, including the Boss. Otherwise, bodge options are, you may be able to fit a cap in with silicone (will need to be kept dry though for long enough so the silicone can go off, so nothing above that point can be discharged!), or if putting a waste pipe back in, Denso tape, (filthy stuff but will do the job probably), is the other.
     
    • Thanks Thanks x 1
    • Like Like x 1
  7. Mr Sparkle

    Mr Sparkle

    Joined:
    17 Dec 2018
    Messages:
    395
    Thanks Received:
    5
    Country:
    United Kingdom
    I believe that it is open ended.

    To get to the area and investigate further, I will have to remove my kitchen units
     
  8. Hugh Jaleak

    Hugh Jaleak

    Joined:
    3 Feb 2008
    Messages:
    7,659
    Thanks Received:
    1,851
    Location:
    Northamptonshire
    Country:
    United Kingdom
    If you can get to it, bodge option 3, put a piece of decent thickness polythene over it, (like a hat), and secure with a jubilee clip.


    (Not that I've ever done anything like that before of course...)
     
    • Like Like x 4
  9. Mr Sparkle

    Mr Sparkle

    Joined:
    17 Dec 2018
    Messages:
    395
    Thanks Received:
    5
    Country:
    United Kingdom
    So I have removed the kitchen base units and I have attached a pic of what I found

    I can't believe it.

    There is just a hole and waste water is pouring straight out of the boss connection?

    What parts do I needed to rectify this?
     

    Attached Files:

  10. Sponsored Links
  11. HERTS P&D

    HERTS P&D

    Joined:
    9 Apr 2010
    Messages:
    13,946
    Thanks Received:
    2,201
    Location:
    Hertfordshire
    Country:
    United Kingdom
    Put a piece of pipe and stop end.

    Andy
     
    • Thanks Thanks x 1
    • Like Like x 1
  12. Madrab

    Madrab

    Joined:
    4 Oct 2012
    Messages:
    9,112
    Thanks Received:
    2,693
    Location:
    East Renfrewshire
    Country:
    United Kingdom
    Measure the size of the boss - probably 40mm - you'll need a small piece of that sized pipe with a straight coupler and a blank/stop end in it - clean that boss up so it's squeaky clean, fit the pipe in with a little silicone around the pipe end so it coats the seal as it goes in and leave it dry for an hour or 2.
     
    • Thanks Thanks x 1
  13. Mr Sparkle

    Mr Sparkle

    Joined:
    17 Dec 2018
    Messages:
    395
    Thanks Received:
    5
    Country:
    United Kingdom
    Yes it is 40mm

    How would you clean the existing boss adapter up? Soap/ water and Toothbrush?

    Or should I just replace the boss adapter with a new one. If so, do you simple pull the existing adapter out?

    For the blanking plug, is this an ideal product?

    https://www.screwfix.com/p/mcalpine...55281954514&ds_rl=1249404&gclsrc=ds&gclsrc=ds
     
  14. HERTS P&D

    HERTS P&D

    Joined:
    9 Apr 2010
    Messages:
    13,946
    Thanks Received:
    2,201
    Location:
    Hertfordshire
    Country:
    United Kingdom
    Don't forget some pipe!

    Cleaning: RUBBER Gloves, damp cloth and bleach.

    Andy
     
    • Thanks Thanks x 1
  15. Mr Sparkle

    Mr Sparkle

    Joined:
    17 Dec 2018
    Messages:
    395
    Thanks Received:
    5
    Country:
    United Kingdom
    Is it possible to do this job using solvent weld?

    I already have the solvent glue and using this stuff always gives me absolute confidence that I'd never have a leak again.
     
  16. Madrab

    Madrab

    Joined:
    4 Oct 2012
    Messages:
    9,112
    Thanks Received:
    2,693
    Location:
    East Renfrewshire
    Country:
    United Kingdom
    The old push fit boss' can't usually be replaced no.

    If you have solvent weld then try a bit of 40mm pipe and see if it fits, usually the push fit boss' are universal and will take the larger SV waste pipe. The it's just a small piece of pipe, a straight coupler then a screwed stop end all glued together.

    Cleaning the boss .... then yes soap and water and just get it nice and clean.
     
    • Thanks Thanks x 1
  17. Mr Sparkle

    Mr Sparkle

    Joined:
    17 Dec 2018
    Messages:
    395
    Thanks Received:
    5
    Country:
    United Kingdom
    Thanks for the help guys
     
Loading...

Share This Page