The most common means for removing water hardness rely on ion-exchange polymers or reverse osmosis. Other approaches include precipitation methods and sequestration by the addition of chelating agents. Devices which use magnetism orelectrolysis as a water softening technique claim to inhibit scale buildup without actually removing hardness ions from the water. Such devices have been marketed to consumers since the early 20th century, but controversy persists over the validity of their claims.

Reverse osmosis systems are used to purify water and remove salts and other impurities from tap and brackish water. It is also capable of rejecting bacteria, sugars, proteins, particles, dyes, and other constituents that have a molecular weight of greater than 150-250 dalton. Our largest tap and brackish water units can come standard with media pre-filters, chemical dosing, and antiscalant. These systems are usually customized to fit individual customer and water application needs

The hardness of water is mainly composed of the cation: calcium (Ca2+), magnesium (Mg2+) ion. When the hardness of raw water containing the exchanger resin layer, the water calcium, magnesium ion is absorbed by resin and release of sodium ions at the same time, this exchanger outflow of water is to remove the hardness ions in softened water, when the resin absorption of calcium and magnesium ions reached a certain saturation, increase the hardness of the water. At this time water softener will according to a predetermined program automatic failure of the regeneration of the resin, by the resin,the resin failure to restore to a sodium type resin with high concentrations of sodium chloride solution (saline).