Siggy wrote:
EricP wrote:
On Sun, 28 Jan 2007 00:08:02 GMT, Siggy


it is probably going out the pressure relief valve, or even across to the
DHW side and out the tap.

I replaced the DHW Watersection valve in 2001 due to corrosion, which I
accidentally discovered when I couldn't turn the attached adjusting
wheel which alters the dhw flow rate. It had locked up solid due to not
replacing the the combicare cartridge often enough. I have done so
religiously ever since, and the wheel still keeps on turnin! Can't see
any sign of weeping or corrosion although it is all a bit packed with
gubbins in there to get a proper view. I don't feel any moistness when I
run my fingers around the many joints there. :-s


ps. I do realise that it could of course be leaking *internally* as you
imply. However, that would suggest an intermittent pressure loss
situation occurring? When I went away for Xmas for a week it had still
dropped the usual .1 to .15 of a Bar when we got back home and no-one
had been using any taps, and we don't have any dripping ones. :-s