A Water softener is basically a machine. This machine work is to convert hard water into soft water. There are many water softeners are makes this company. Actually this company differents kinds of machines but better make water softeners. some water softener is costly and some are low prices. All water softeners are available in the markets. you can buy `easily in the markets. those water softeners are costly, water softeners are great working and extra features. And those fewer prices, water softeners great working but enough features. So some are salt-free water softener. So all water softeners are available in the markets you can choose the best water softener.