We had an issue with our heating vessel which was red (Sealed system) which was corroded so was leaking water. It was replaced with a grey one.
Since then we have had further issues with the heating system with pressure going down and I have had two independent plumbers/heating engineers out. Both have said that the heating vessel should be red and not grey. Surely a colour doesn't matter does it?
I have gone back to the developers whose heating company have said that the red ones are now being discontinued and that the grey ones are now being used. There is conflicting information here and does this mean that the developers are just trying to get out of their responsibility.
I have no clue with this. HELP