Magnetism is a mysterious phenomenon to most people, and even many of us who have taken a few courses in college physics often don’t feel we really “understand” it. In the 19th century, hucksters and scam artists were taking advantage of the public’s ignorance of magnetism by offering fraudulant magnetic products to treat everything from baldness to impotence, and an even wider variety of magical wonders are being hawked over the Internet nowadays.
There is a long history of the promotion of magnets to alleviate the “hardness” of mineral-containing waters, and particularly to control the deposition of scale in teapots, plumbing systems, evaporators, and boilers. There are now a large variety of devices on the market that claim to reduce scale deposition, and some claim to “soften” the water as well. The earlier devices mostly employed permanent magnets, but many now use alternating magnetic or electrostatic fields. The magnetic field surrounds the pipe at some point and penetrates it from all sides. This obviously limits its use to non-ferrous pipes such as copper or plastic.
Magnetic water conditioners designed for home use are relatively new. Most of what is available for the home can be purchased through independent distributors. Magnetic water conditioning systems are rarely available in home improvement stores or plumbing supply shops.