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

Water in sink trap bubbles when shower is running?

Discussion in 'Plumbing and Central Heating' started by humanracer, 22 May 2020.

  1. humanracer

    humanracer

    Joined:
    3 Jun 2018
    Messages:
    40
    Thanks Received:
    1
    Country:
    United Kingdom
    My shower/bath and sink share the same drain. No water travels to the sink when the shower is on. However when I have the shower on the water in the sink trap starts to bubble. It doesn't come up the sink but I can see it bubbling away in the trap. Is this an issue with pressure? What would cause this?
     
  2. Sponsored Links
  3. CBW

    CBW

    Joined:
    26 Sep 2019
    Messages:
    7,004
    Thanks Received:
    1,856
    Location:
    North
    Country:
    United Kingdom
    Sounds like a partial blockage or incorrect fall on wastepipe. It’s not pressure related.
     
    • Like Like x 1
  4. Hugh Jaleak

    Hugh Jaleak

    Joined:
    3 Feb 2008
    Messages:
    7,232
    Thanks Received:
    1,689
    Location:
    Northamptonshire
    Country:
    United Kingdom
    Where do they all drain to? Possible blockage downstream somewhere, and as the water cannot get away properly, it is displacing the air in the pipework as it fills up, this air is then finding the easiest escape route, i.e. the basin trap.
     
    • Like Like x 1
  5. humanracer

    humanracer

    Joined:
    3 Jun 2018
    Messages:
    40
    Thanks Received:
    1
    Country:
    United Kingdom
    Thanks. The water in the sink goes to a drain outside via a pipe on the floor. This outside drain is shared by the bath/shower. So you think the block is potentially between the bath and the sink under the floor?

    Last time this happened and there was an actual sink blockage, the plumber used "one stop drain cleaner" which I believe is like acid. He left some of the bottle here. Maybe I should pour the rest down the pipe in the floor.
     
  6. CBW

    CBW

    Joined:
    26 Sep 2019
    Messages:
    7,004
    Thanks Received:
    1,856
    Location:
    North
    Country:
    United Kingdom
    If it’s like acid, make sure you’re careful and wear suitable gloves. You could try a plunger or a drain auger.
     
  7. Sponsored Links
  8. Madrab

    Madrab

    Joined:
    4 Oct 2012
    Messages:
    7,929
    Thanks Received:
    2,237
    Location:
    East Renfrewshire
    Country:
    United Kingdom
    Do you mean One Shot? If so, please don't use it, it's concentrated sulphuric acid and should only be used by professionals. It's not really a DIY product and it shouldn't have been left with you, especially if he didn't make you aware of the dangers of using and storing it.
     
    • Like Like x 2
  9. humanracer

    humanracer

    Joined:
    3 Jun 2018
    Messages:
    40
    Thanks Received:
    1
    Country:
    United Kingdom
    Yes one shot instant drain cleaner with sulphuric acid.
    It did get the job done last time although it did smell of eggs.
    I can't think how else to fix it. An auger won't go that far.
    would you advise against using it even if I wear gloves and goggles?
    Maybe I need to call a plumber.
     
  10. CBW

    CBW

    Joined:
    26 Sep 2019
    Messages:
    7,004
    Thanks Received:
    1,856
    Location:
    North
    Country:
    United Kingdom
    How far is it?:eek:
     
  11. humanracer

    humanracer

    Joined:
    3 Jun 2018
    Messages:
    40
    Thanks Received:
    1
    Country:
    United Kingdom
    Problem solved thank you. Went outside and there was a dead mouse at the end of the pipe!
     
    • Like Like x 2
    • Thanks Thanks x 1
  12. DIYnot Local

    DIYnot Local

    Joined:
    3 Sep 2019
    Country:
    United Kingdom

    If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

    Select the supplier or trade you require, enter your location to begin your search.


    Are you a trade or supplier? You can create your listing free at DIYnot Local

     
Loading...

Share This Page