Water Demineraliser Normal tap water contains minerals such as calcium that can be detrimental to the operation of your steam iron. Using water demineralised with Sunbeam Water Demineraliser in place of regular tap water will provide better steam performance and will prolong the life of your iron. It prevents minerals clogging the steam vents of your iron, and eliminates dirty mineral deposits which can stain your clothes. Features Produces up to 30 litres of demineralised water Prolongs the life of your steam iron