OnliSoft Salt-Free Water Conditioner SystemProtects appliances and plumbing from harmful hardness build up. Salt less and non electric operation. Certified components. Lifetime Warranty on Tanks and Parts* Why Use a Water Softener The mineral build up, or scale, can occur in plumbing and household appliances when your water is hard. Solid deposits of calcium carbonate can form when hard water is heated. This scale can reduce the life of appliances, raise the cost of heating your water and clog