Does anyone know if British Gas should've removed the flu when they removed the old back boiler? Its still there and didn't realise until recently. Could find any specifics in the order, just says remove old boiler.
I had British gas over to quote to replace my backboiler with new combi. All great and had it installed only later to find on this forum while looking for something else that the one pipe system is not ideal for new combi.
Seems to...