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The pump is not stuck. The drip on the heat exchanger has been there for more than 6 years that I know of. It drips once every few hours. It drips onto a metal tray away from any other parts of the bolier. I catch it in a metal dish. It is not enclosed in anything so dont see how it can cause a...

I do not want to replace with built in as most repair guys say put in an external tank and leave existing in place as its more hassle and more damage can be done by taking the boiler off the wall and replacing the existing. The experts say that its better to leave in situ and it is a very...

Yes that is a shame. After reading this I looked up the parts named and managed to identify most by other pics on the internet. But I did find it very easy to understand the basics of how it all worked.

My expansion tank rubber diaphragm has had it and I am unable to continue putting air into the air side with a footpump as now the pressure drops every few hours. I have a small drip from the heat exchanger on the seam which I think has been there for a long time. Also I was bleeding the...

I found this excellent html file for an easy explanation of how a boiler works. http://www.makewrite.demon.co.uk/SealedCH.html I hope this helps the novice as it did me.