In France, the limestone is present in water in many areas, especially where water is pumped from the subsoil rich in limestone. To filter the limestone, there are two solutions: - Or utliser softener to power the whole house in freshwater. - Or use an anti-scale eco no salt, no chemicals, no electricity, with a powerful magnet to prevent tartar from forming and to remove more than one already in the pipeline. It is also equipped with two filter to trap sediment, chlorine, bad taste, pesticides, heavy metals ... Only cartridges are changed every year around. It is best to have it installed by a professional. For more information, visit the home page of the purifier Ydropur WaterO.