corgiman
Thanks for the reply. Did some research on expansion vessels and that certainly fits the bill.
I see quite a few references to re-pressuring this vessel for a Potterton 80. Do you know if the same is true of a HE 24 plus? Although I can see nothing in the manuals as to how this might...
Have a Potterton HE 24 Plus condensing boiler (about 2 years old) that works fine normally. However, put the heat on the other night and noticed that the pressure rose to 3 bars, which the manual identifies as an error state. When the heating was last in regular use, before the 'barbecue'...