1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Discuss Reasons for Dripping Flue in the Central Heating Forum area at UKPlumbersForums.co.uk.

Tags:
  1. Julian Such

    Julian Such Member

    Is there an obvious cause for a dripping flue on a newly installed condensing system boiler? not constantly but enough to form a damp patch on the patio below.

    Thanks
     
  2. Harvest Fields

    Harvest Fields S. Mod Trusted Plumber GSR Top Contributor!!

    It should be pointing upwards slightly for the condense to run back to the boiler.

    Any pictures
     
    • Agree Agree x 2
  3. townfanjon

    townfanjon Trusted Plumber GSR Top Contributor!!

    It is a problem for manufacturers, from what I have seen most do it to a certain extent .
    As ^^^above it should fall back to the boiler , can you see a slight “fall” backwards.
    Some flues however will appear level , the “fall “ is built in to the flue .
    Whos the manufacturer?
     
    • Agree Agree x 1
  4. Harvest Fields

    Harvest Fields S. Mod Trusted Plumber GSR Top Contributor!!

    Town is also right. What make and model of boiler do you have?
     
  5. Julian Such

    Julian Such Member

    Viessmann vitodens 200w
     
  6. Harvest Fields

    Harvest Fields S. Mod Trusted Plumber GSR Top Contributor!!

    No that clued up on veissmann to be honest. But the flue pipe outside should look at least level. (The fall may be on the inner flue pipe) sometimes you can get an odd drip from the terminal but depends on a few different factors.
     
  7. bogrodder

    bogrodder Plumber GSR

    Yep, even on correctly installed horizontal flues, they can drip . unfortunately
     
  8. townfanjon

    townfanjon Trusted Plumber GSR Top Contributor!!

    The flue should fall , its not built in the flue , ie the installer does it .
     
    • Like Like x 1
  9. scott_d

    scott_d Plumber GSR Top Contributor!!

    It does happen in colder months
    You can’t always angle the flue back or rain water can get in.
    Some manufacturers make a deflector for the end that can help
     
    Last edited: Feb 8, 2019
  10. garygvl

    garygvl GSR

    Love predictive text
     
    • Funny Funny x 2
    • Like Like x 1
  11. scott_d

    scott_d Plumber GSR Top Contributor!!

    Edited as it didnt make much sense :D
     
    • Agree Agree x 1
  12. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    any pics of the flue and boiler ?
     
Loading...
Similar Threads - Reasons Dripping Flue Forum Date
Single lever monobloc mixer tap with new cartridge is still leaking (not dripping from spout). Valves & Taps Monday at 8:10 PM
F n e tank vent pipe dripping Plumbing Forum Jun 15, 2019