Old gloworm swiftflo.
Turned the central heating on. Pressure went up to 3bar. When the
heating went off it dropped back to 0.3 bar (should be 0.7). Refilled
to 0.7 bar and turned on the heating. Back up to 3 bar.
Any ideas on the cause?
Expansion vessel isn't working. It should be half full of air,
separated from the water by a diaphram. On the air side, there's
a tyre valve which is used to pump it up. Take the cap off and
try releasing a little air. If water comes out, the diaphram has
split and you need a new expansion vessel. If air or nothing
comes out, then you can try pumping it up with a bicycle pump.
With the pressure released in the heating system, pump it up
to about 0.5 bar (7lb/sq inch). If it leaks out again, it might
need a new tyre valve, if it's replacable.
[email address is not usable -- followup in the newsgroup]
On 27 Oct 2007 09:02:22 GMT, email@example.com (Andrew
I've checked for leaks elsewhere and found none so what you say is
probably the fault. Still have to get a man in. My eyesight and health
isn't good enough anymore to risk messing with boilers in situ.
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