A Water Softener is a unit that is used to soften water, by removing the Minerals that Cause the water to be Hard.
Hard water is softened by removing the calcium and magnesium it contains. When hard water passes through the softening system’s resin bed, it exchanges the hard ions in the water for soft ones, so only softened water passes through to your home. Once the resin bed fills up with hardness ions, it must be cleaned. Salt is typically used in the regeneration (cleaning) process and restores the resin to a “clean” state so the ion exchange process can begin again.
In a Pressure Sand Filter, water is passed through multi layers of filter media consisting graded sand, pebbles and gravels layers. The contaminants in the water are captured in the media bed and filtered water passes into the discharge manifold at the bottom of the tanks. The next and last step is backwashing, a process of effectively removal of captured contaminants from the media bed. After back-washing the filter is rinsed with raw water and after the required quality of water is achieved the filter is put back into service.