The anti-scale water filter, delivered with a bag of granules, makes it possible to rapidly filter tap water before being used for ironing. 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. Anti-scale granules should be replaced when they turn completely brown. Refills are available on our e-shop, by calling Laurastar Consumer Service or in selected Laurastar partner stores.