The basis is the Fillsoft housing with one or two cartridge slots, which can be equipped with the relevant resin cartridges for softening or desalination of the filling and make-up water. This results in four individual variants with different capacities and/or application areas. The familiar Fillsoft I and II units as pure softening devices are being replaced by the above mentioned variants. Existing devices are fully compatible with the new concept and can still be implemented accordingly.
