I'd have thought a water leak this serious could be heard or observed by
some tell tale things like condensation in odd places etc, dampness and
other more annoying things like fungal or mould growth in funny places,
even a smell in a room.
Brian

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The Sofa of Brian Gaff...

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"MrCheerful" wrote in message
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On 27/11/2016 12:56, mechanic wrote:
We have a problem with pressure loss in our central heating system.
Topping up each day and loosing 1bar or so in a matter of hours
shows something is wrong. Brit. Gas have said there must be a leak
and they've got to the stage of suggesting taking up flooring to
inspect pipes and junctions. This is getting expensive and
disruptive! BG have a £1000 limit on their part of repair and making
good costs. Have people tried:

http://www.adileakdetection.co.uk/le...tion-services/
http://www.leakdetectionspecialists....erty-leaks.htm
http://www.leakbusters.net/
(There are others)

Any experience with one of these companies? Pin-pointing the leak
position may save money in the long term, even though the survey
will cost a few hundred pounds. I've yet to explore the home
insurance angle to reclaim some costs.


Can you isolate sections by adding ball valves, then you could narrow down
the likely fault area.
But first off have you checked the obvious stuff like the pressure relief
valve (which can and do leak after a time) Air bleed valve (mine is a
brass pot on the pump) Pressure in the pressure vessel (if this has no
air pressure then system pressure can go high and lose water through the
pressure relief valve)