"newshound" wrote in message
o.uk...
On 07/07/2019 20:57, Chris Hogg wrote:
On Sun, 7 Jul 2019 20:25:54 +0100, Gareth's was W7 now W10 Downstairs
Computer wrote:

Someone has just asked me about the device sold to stop
your water pipes and tanks furring up, which consists of
a coil wound around the pipe that is then excited by
an oscillator.

Personally, I think the whole thing to be bollox.

Does anybody know the physics behind it?

I cannot see how orienting the calcium saly ions
in one particular direction will stop furring up
some distance away especially if there has been
turbulent flow in between.

I advised him to get a water softener fitted instead.

The general scientific opinion is that it's ********. The practical
experience of some people is that they seem to work. YPYMAYTYP
https://tinyurl.com/y4cq59c5
https://tinyurl.com/y28rl5xq

When I moved to this area, a fellow sceptic (geophysics PhD) said that, in
fact, magnets seemed to stop his kettle furring (the scale just settled in
a loose gritty layer). I tried one and it seemed to work too. Then I moved
house (but just across the road) and there it didn't seem to work the
same.

Thats because the Alzhiemers got you to forget to turn it on in the new
place |-(

YMMV.