AUTOMATIC FILTRATION SYSTEMS
A water softener reduces the calcium or magnesium ion concentration in hard water. These "hardness ions" cause three major kinds of problems. The metal ions react with soaps and calcium sensitive detergents, hindering their ability to lather properly and forming an unsightly precipitate - the familiar scum or "bathtub ring".
Presence of "hardness ions" also inhibits the cleaning effect of detergent formulations. More seriously, calcium and magnesium carbonates tend to adhere to the surfaces of pipes and heat exchanger surfaces. The resulting scale buildup can restrict water flow in pipes.
- Strong cation exchange resins, certified for drinking water (NSF)