"Andy Hall" wrote in message
...

I was thinking of a electrolytic scale inhibitor which is fitted in
the pipes themselves(do these come under the chocolate teapot heading)

I am afraid so.

If you do a Google Groups search on this newsgroup you will find that
this subject comes up about every month to two. We have one
individual who has one of these and claims that it works. He is in a
minority of almost one. Pretty much everybody else who has bought
one reports no, little or inconsistent results.

You should Goggle a bit more, "many" claim they work. I have come across
many very large industrial units that work very well in hopitals and the
likes.

Mine is an Aqua Dial, who make salt softeners and phosphor de-scalers too.



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