Complete protection for your household appliances. X-Guard cartridges for AWP9820 effectively prevent limescale build-up and reduce solid particles to protect water heating appliances such as boilers, washing machines, and dishwashers. They produce weak electrical noise effects on solid mineral ions, such as calcium, magnesium, and carbonate ions, preventing the formation of deposits. Suitable for protecting individual appliances and economical with stable physical and chemical properties that do not cause phosphorus contamination.