Leak under boiler.. Help

Discussion in 'Plumbers' Talk' started by W22ULF, Nov 11, 2019.

  1. W22ULF

    W22ULF New Member

    Hi Guys.

    Firstly I am new to the forum. I am from Blackburn, England.

    I need your help please. I have a small leak from the a white plastic pipe which feeds from under my Vallient Combi Boiler and leads outside. The leak is from the u-bend. I have attached a picture to help.

    Please advise me on what the purpose of this pipe is and what would be the best way about going to repair it. I tried some tape but it leaked through. The leak is not major but still needs repairing.

    Many thanks

  2. W22ULF

    W22ULF New Member


    Hopefully the picture link works.
  3. W22ULF

    W22ULF New Member

    If the pictures don't work please can someone tell me how to upload them..says file to big when I try to use the image icon above.
  4. W22ULF

    W22ULF New Member

    The leaking area is highlighted in yellow

    Attached Files:

  5. W22ULF

    W22ULF New Member

    This is a slightly more closer picture showing a more accurate location for where the leak is actually from. Many thanks folks

    Attached Files:

  6. jonathanc

    jonathanc Screwfix Select

    It’s a condensate drain. Basically waste water vapour from the combustion process.

    Best repair is to replace the leaking parts. They are solvent weld.
  7. Baxi Boy

    Baxi Boy Active Member

    That pipe is the condensate pipe,if you can separate the pipes at the bend when boiler is off,you could dry them and use some joint sealant such as Rectorseal Tru Blu.

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