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It is not a combi, but a boiler with a pump. It is a bit of a nightmare, every plumber who has ever looked at it has asked if we actually get hot water and heating. I'll have a look tomorrow in daylight, as it is in a wee boiler house attached to the side of the house. One other question if I...

It is a thought, tho' I am still getting air out of a couple of the radiators. How do you turn a pump down? Thanks

I put in Ferrox DS40 descaler and cleanser. I had cold spots on various radiators, and odd radiators wouldn't come on and after numerous goes at trying to get them going I opted for the flushing of the system, (clues from this web site). I put the stuff in the header tank and let it run about...

My radiators now make a noise like a kettle boiling. This is since I flushed and refilled the system. I have bled all the radiators , a number of times, but I am still getting these noises. I assume it is air but how can I make sure it is all out of the system? Is there a best order for...

Ok I'll give it a go, many thanks for the replys. How hard or easy is it to balance a system? David

What is the best way to refill a system after it has been drained down. It is a system with a header tank. Is it best to shut the valves and refill each radiator in turn, or leave the valves open or what. TIA David