Hard water is softened by removing the calcium and magnesium it contains. When hard water passes through the softening system’s resin bed, the calcium and magnesium (hardness) ions are removed through an ion exchange process, so only softened water passes through to your home. Once the resin bed fills up with hardness ions, it must be regenerated (cleaned). Salt is typically used in the regeneration process and restores the resin to a “clean” state so the ion exchange process can begin again.
Clean, soft water makes cleaning easier, improves the efficiency and lifetime of water-using appliances and minimizes scaling or staining on your plumbing and fixtures. Water softeners actually save you money