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Well I THOUGHT the noise was there but I guess it must have been an echo running through the radiators?? :oops: But when we both listened to the boiler last evening the plumber was convinced that it was in the boiler, especially as he took the front of the fire off and heard the kettling...

Nippon does it every time for me. Comes in a powder or liquid form and the beauty of it is that you only have to put down a small amount, around where you see the ants running, and they eat/drink it before taking it back to the nest and killing all the other from within. You can see them...

It appears that the problem is that the water cannot get out of the boiler around the system quickly enough and is "kettling" inside it. ................it is literally boiling in the boiler. This is happening because the boiler, being new, is very efficient and the non-return valve put in...

Peter working on it - will post answer Many thanks Shewolf

Thanks ChrisR He installed a non-return valve but I do not know about an inhibitor. What does an inhibitor do? (she asked stupidly) :?:

Hi everyone I am new to this site and have a question :cry: A month or so ago, a plumber changed over two water tanks in my loft, replacing old ones with new, lidded and lagged plastic ones. He also moved some of the piping around to make it neater (it was a real rats maze up there...