In our homes, most of the problems with technological systems such as boilers, washing machines, dishwashers, solar panels, etc. are caused by hard water. The hardness is linked to the presence of calcium and magnesium. The hardness is linked to the presence of calcium and magnesium. These salts precipitate forming scale. Hard water is also responsible for suffering from hair and skin, felted linen, use of large quantities of detergent and high energy bills. The water softener is a system that eliminates the salts responsible for hardness, eliminating all the problems related to it. These plants are in compliance with the Decree of the Ministry of Health n. 443 of 12/21/1990 and subsequent amendments.