Soft dripping noise within wall after opening hot water

Discussion in 'Plumbing and Central Heating' started by Gerallt, 25 Apr 2019.

  1. Gerallt

    Gerallt

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    Only recently I've noticed a quiet dripping noise that comes from within the wall cavity, quite soon after opening a hot tap. It doesn't begin straight away, maybe after 20 secs or so, and then continues every 2 secs or so for at least 20 mins before it tapers off, getting more infrequent and quieter.

    It doesn't sound like expansion, more like dripping on a soft surface. It doesn't either seem to be the waste - the basin is on the ground floor and the waste goes straight out.

    A job for a plumber/leak specialist, or should I stop worrying? The wall in question is in the kitchen corner, with units, cupboards, worktops... I really don't want to entertain the idea of exposing the cavity to fix any pipes!!
     
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  3. planenut

    planenut

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    To me, it sounds like expansion; looking at the supply, is there a chance of assessing whether one pipe is fitted or it may be jointed? Is it a cavity wall because if it's not, then one would not hear dripping, but perhaps get a damp test of the wall done.

    If it was not expansion, then I'd expect to hear a drip from the start of use.

    Good luck.
     
  4. ianmcd

    ianmcd

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    Sounds more like expansion
     
  5. EFLImpudence

    EFLImpudence

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    Turn off the water heating and see if it does it with cold water in the hot water pipe.

    Surely there won't be pipes in the cavity, anyway.
     
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  7. What system set up is it, combi boiler, tank and cylinder? Definitely a cavity wall and not hollow wall? I have found pipes that leak into a cavity before now.
     
  8. dilalio

    dilalio

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    Get your hearing checked first :);)
     
  9. bernardgreen

    bernardgreen

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    I agree, it was a leak it would be leaking all the time irrespective of the tap being open or closed.
     
  10. Keithmac

    Keithmac

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    Our central heating has done this for past 14 years, you would swear it was a drip but we rarely if ever have to top the pressure up on the boiler.

    A leak would be worse with the tap off (more pressure to the leak site).
     
  11. DIYnot Local

    DIYnot Local

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