We has a new Vaillant combi boiler fitted 3 years ago and I watched the plumber completely flush the whole system until the water was running clear.
I have just removed a radiator and emptied the contents noticing that the water was completely black but without sludge.
So why does the water go black?
And is there something that all householders should do on a regular basis to maintain their central heating system (other than an annual boiler service)?
I have just removed a radiator and emptied the contents noticing that the water was completely black but without sludge.
So why does the water go black?
And is there something that all householders should do on a regular basis to maintain their central heating system (other than an annual boiler service)?