I've just returned from the Dorset Steam Fair. You wouldn't believe just how many trumped up uses a magnet has. It'll stop all sorts of bodily ailments. Purify water in taps and make the fuel in your car burn more efficiently. It will also make heating oil burn hotter and clean Fe particles out the water in the system.
Out of all these magnificent claims, only the latter is true. There's huge amounts of money being made, all on a claim and nothing else.
we got plenty of salesman in the office claiming all sorts of things when fitting them to boilers , seems that if u interrupted there sales pitch they lost track and was totally lost
agree there is some serious money being made of something that makes a great place to store ur paper clips
the magnets that are put into heating systems work extremely well by catching a lot of the magnatised junk
a lot of boiler manufacturers insist on fitting inline magnets for there combi boilers to help reduce scale build up in there flat plate exchangers as part of the warranty , the canister magnets that I clanged out every year was normally full of junk and suprising in how well they worked
the junk magnets were yellow if I remember that were fitted to the gas line