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Pressure loss on oil boiler?

We have a grant oil boiler and we are losing pressure - more than 1/2 a bar a week. We top it up and down it goes. We are told we must have a leak but surely we should have noticed a damp patch at least on a ceiling. We have 4 pressure release valves on the system which have only just been replaced. Any ideas? I hate the idea of water leaking in the house

Ali Swanston
October 2008

Heating, Oil Filled Radiators Pressure Loss Oil Boiler

it could be the auto bleed valve on the boiler

george
July 2009

We have a similar issue with an oil combi boiler. There is a pressure gauge in the boiler which can be adjusted to somewhere around 2 bar. You should have a presure gauge somewhere which can be adjusted.

If anyone can advise on why I'm losing pressure from 2 bar to 0.5 bar within hours. I've looked for leaks but everything seems ok.

Any help appreciate.

Scott Cummings
October 2008

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