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Just some feed back - there are 2 grey taps on the ultracom cxi for the inbuilt filling loop. The plastic taps were rounded off and not closing the valve fully so removed the taps and cycled the valves a couple of times with a large slotted screwdriver. The pressure has been steady since. I am...

Yep will do. Although I did reduce to 1.2 bar last week (cold) then heating on 3.00PM then off at 11.00PM. Next morning pressure 1.5 bar ( cold). Somewhere 0.3 bar gain. Will post back with more data. Thanks.

No I havent let get above 2.5 bar. The highest It went up to was 2.4 bar then I decided to bleed some out of the bathroom rad (easiest so I can monitor the pressure). Since then I made sure it is 1.5 - 2.0 bar when I check it in the morning before the heating comes on so it never goes above 2.5...

No I am a Mechanical Engingeer not a qualified Gas Engineer. I fitted the expansion vessel myself (quite an easy job and I would never touch anything on the gas side) as I had to order by a boiler parts comapny as British Gas will not change the expansion vessel as it is not covered under the...

Well I have to to keep the pressure from going up to much. The cold pressure rises by about 0.2 bar every couple of days then rises about 0.5 with the heating on. It seems as though the system pressure is creeping up somehow overnight when the heating is off. Other than that everything is...

Replaced the expansion vessel but pressure still keeps going up every few days and I have to bleed some out the radiators to get the pressure down to 1.5 bar as it goes up to 2.0 bar with the heating on.

Hello all, My combi boiler has just been fixed by an independent firm (was leaking internally from a pipe which had to be replaced) and is now all working fine apart from when heating is off pressure 1.5bar when house is up to temperature >20 degrees the pressure is 2.5bar and the condensate...