"Bilbo Baggins" wrote in message
...
I've recently had a mains pressure unvented hot water system fitted and I
am
absolutely delighted with it (fantastic shower pressure without any noisy
pumps).

My question relates to the pressure vessel for the central heating system.
The vessel has a pressure gauge and a water feed attached and my plumber
recommended that I have it set at 1 bar pressure. When the system is idle
the pressure is currently 1 bar and when it's in demand it's nearly 2 bar.

Is this correct or should I have it running at 1 bar ? I don't want to
run
it at too high a pressure and risk the rather aged pipework springing a
leak.

KW



Heat causes things to expand and water is no exception. The rise in
pressure is natural.

Just make sure that all the radiators are full of water and not air, but if
it is a neaw system, then this will already have been done, so leave it
alone until it doesn't do its job correctly.

In other words, If it ain't broke, then why try to fix it. :-))