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It is a small copper thing about 4 inches tall like a small boiler with a car type valve on top and sits outside of the tank with a red bigger tank thing underneath, is this the expansion vessel and it is outside the boiler i think My husband looked on the manual and he says it was the...

can this be replaced this e ves

Hi Checked the expoansion vessel as suggested in other part of forum and put my finger in the top[ and pressed the button and water shot out of it , my husband then turned the drain cock pipe valve and it stopped , what is hap[penning

My husband fitted a radiator a while ago and sine then we are having constant water coming from our prv on our sime 90 combi - the radiators have been bled but our hot water is always luke warm and fluctuates- he has fitted the pipes on but not put them one higher than the other - how can we...