All Purpose Descaler Tablets Limescale Cleaning Coffee Machine Kettle Iron All purpose de-scaler tablets removes thick layers of oxides formed on metals such as boilers, kettles, water heaters. These de-scaler tablets works well on removing so. These descaling tabs is needed when a boiler builds up calcium, water scales and other non-soluble deposits on its surface to reduce boiling performance. Use these de-scaler tabs for a periodic descaling of heat exchangers that are needed to remove and control water scale buildup, corrosion and improve boiler efficiency. Includes pack of 4 units de-scaler tablets that is reliable and has been tested and approved for efficiency and safe limescale cleaning. All tablets are NSF certified to be secure and suitable for use on machine for food and beverage preparation.all purpose descaler tablets limescale remover kettle coffee machine washing machine dishwasher.