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I am about to replace the hot water tank in my CH system. The connections for the cyclinder seem to be for 22mm pipe, but my hot water system has gravity feed for the hot water, and the pipes to the cyclinder are 28mm. Do I need a diffeent cyliner or is it OK to connect to the cylinder using a...

Ah, I see. Well I ran the boiler in hot water only setting (gravity feed only), and it still bangs. So I guess it is not the pump. I also guess that leaves 1. Air in system - how does it get there and how do I get rid of it 2. Scale, sludge etc. Any more comments would be...

Hi It is gravity water heating, pumped CH, why ?

Thanks Geoffgas1, some questions 1. How ould air get into the system ? and how do I get rid of it / keep it out ? 2. How ould the pump cause the problem ? I am interested because I thought it may still be a corrosion issue. Any comments appreciated as it will help me to work out...

Hi I have a Glow worm back boiler which makes banging/ load popping noises when it fires up. A few weeks ago I drained the system and refilled it, adding some cleaner. I flushed it after a few ours of operation and flushed it out with clean water until the water coming out was reasonably...