Fernox Electrolytic scale reducer (supplied and fitted )

The Fernox Electrolytic Scale Reducer range uses electrolytic principles to prevent the build-up of scale throughout the home, and remains effective for up to 10 years, dependent on water usage. It works by altering the structure of the hardness salts, inducing coagulation and providing benefits to a range of appliances from kettles to showers and boilers offering whole house protection against scale. (fernox.com)