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  1. M

    Leaking microbore but no pressure loss

    That sounds feasible, thanks.
  2. M

    Leaking microbore but no pressure loss

    Not had to top up for a year.
  3. M

    Leaking microbore but no pressure loss

    Yes you may well have a point. It's enough leakage to buckle plastic floor tiles, but that could have been over several months. Thanks for your response.
  4. M

    Leaking microbore but no pressure loss

    We have 35 year old copper microbore underfloor that now leaks on one run, minutely, but enough to have to correct. However there is no pressure drop whatever showing on our Vaillant boiler. According to all the forums I've ever read this is impossible. Comments eagerly awaited.
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