Limescale is the deposit left behind by hard water, it is made up of calcium and magnesium compounds. It causes scaling of heater elements in kettles, dishwashers and washing machines, as well as scaling in your pipes and boiler. It is likely you can see limescale on your kitchen surfaces, taps and shower. Softened water eliminates limescale, making your appliances and boiler work more efficiently and last longer.
Scale in your pipes and hot water cylinder will increase your heating costs considerably. Figures show that just ¼” (6mm) of scale will increase your water heating costs by 50%. Hard water also causes unsightly deposits of limescale on sink surfaces, taps and shower screens meaning that extra cleaning time and harsh chemical cleaners are needed to remove it.