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Discuss Internal Leak, will the boiler still draw cold water when turned off? in the Plumbing Forum area at

  1. Matt Carney

    Matt Carney New Member

    In April 2018 I had a water meter installed at my tenancy property (Not a property magnate, just had to move out of the area and couldn't sell it) the same time I had a new Greenstar 30i boiler, stop cock and old back boiler and immersion tank removed.

    There is a small pass noticeable through the water meter, approx. 3 litres per hour. The leak dial turns slightly, then stops, and does this repetitively, in this fashion. I've done this even isolating all appliances including toilet, sink, washing machine etc.

    The pipe from the meter to the stop cock is fine. No movement on the meter at all.

    Before I get a plumber in to pull the ground floor floors up, is there any way my new boiler could be drawing cold water from the system after its been switched off? This is the only thing I haven't isolated. I don't want to mess about with the boiler incase I gas the tenant!
  2. CBW1982

    CBW1982 GSR Top Contributor!!

    Yes, but this could be a boiler leak in a few different ways. I’m not going to be giving pointers so best getting your gas safe registered engineer in to look at the boiler 1st.
  3. Matt Carney

    Matt Carney New Member

    There are no noticeable leaks beneath the boiler, and the pipes all dry. Are you pointing to internal within the boiler?
    • Agree Agree x 1
  4. SimonG

    SimonG Trusted Plumber

    Can you have a word with your brother and tell him to stop with all the Brexit doom and gloom. Cheers.
    • Funny Funny x 4
  5. scott_d

    scott_d Plumber GSR Top Contributor!!

    Toilet overflowing?
  6. YorkshireDave

    YorkshireDave Plumber

    The 'pulsing' nature of it suggests something passing after the pressure builds. So in my opinion it's more likely to be plastic if you have any. Any underfloor - possibly mice?
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