SCALESWEEPER, Hard Water Descaler Unit, Protects Your Appliances & Plumbing By Eliminating Lime Scale Residue Caused By Hard Water Without The Use Chemicals Or Salt, Helps Dissolve Pre-Existing Scale, Will Dramatically Reduce Corrosive Green & White Lime Scale Residue On Sinks, Chrome Faucets, Toilet Bowls, Bath Tubs, Shower Heads, Glass, Tile & Windows, No Dishwasher Scale Residue On Glasses, Plates & Cutlery, Ultimate Protection Against Scale Build Up & Scale Corrosion Inside All The Pipes & Valves In Your Home, Works On Galvanized, Copper Or Pex Plastic Piping.