On Sun, 6 Nov 2005 22:15:35 -0000, "Bob Watkinson"
Bob, this is understandable, but if it is the thermostat (2hrs after
heater goes on is plausible for water to be causing noise), then it is
Do you still get the moaning if the immersion is left off (I know that's a
really inconvenient test!). I'm reckoning that the immersion has nothing
to do with this but possibly an increase in water pressure at night.
Another possibility is that there is a slight problem with the float valve
on the storage cistern. When the HW expands it raises the level in the
cistern a bit, possibly interfering with the operation of the float valve
(which should have been off and be staying off).
Suggested causes of action:
1) Check for air in dead branches of the mains cold water plumbing.
2) Renew washer/diaphragm in the cistern float valve.
3) As (2) but also for any mains WCs.
Ed Sirett - Property maintainer and registered gas fitter.
The FAQ for uk.diy is at http://www.diyfaq.org.uk
A short while ago the whining noise started up again (obviously economy 7
water heating off). Not being in the early hours of the morning we were able
to investigate more fully. We pulled the washing machine out to try holding
the pipes and found the blue appliance hose leaking at the washing machine
end in a fine jet. We stopped the leak and cured the problem. So it looks
like the fact that it was highly audible in the bathroom and the economy 7
were red herrings.
Many thanks for all your help folks. I can look forward to a good nights
kip. Strange how the leak seems to have been intermittent though. Must be
something to do with increased supply pressure.
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