On 17 Mar 2004 07:28:13 -0800, in uk.d-i-y (Tony
Commander) strung together this:

Pumps don't have automatic valves. What sort of system have you got,
do you have a valve and possibly cylinder stat in the cylinder
cupboard or do you have a gravity system. If the latter it's more than
likely just convection from having the water on.

bog standard gravity fed....

convection could heat most rads in the system then?

don't doubt you at all, but am shocked that they could get so hot
without phsically having water pumped through them...

hmmm, will have to check the temperature setting for the hot water
now, to see if i can turn that down in attempt to cool the rads down..

mind, it's better than freezing i guess, even if the gas bill could be
horrendous

If it's a bog standard gravity system the hot water temp will be
controlled by the boiler thermostat.
I didn't think that convection would heat the rads from cold but once
they're warm I suppose the convection is helped along a bit by this.
It does all depend on the actual piping of the system and the size of
it as well really.
--

SJW
A.C.S. Ltd.