This is for the SMART U and I. The limescale filter cartridge, specially designed by Laurastar Swiss engineers, allows you to filter tap water before it is used for ironing. *Please note that the water tank holder is required to use this filter.
By preventing limescale, it prolongs the life of your iron
By filtering salts, it improves steam quality
Anti-corrosive, it also prevents damage to boiler components
The limescale filter cartridge should be replaced when anti-scale granules turn completely brown