Water Softening Systems that is used for removing hard salts and providing suitable water. The water gets hard when it contains more of calcium and magnesium ions. Softening is the ion exchange process, which is done through resin, is preferred over others plant as it is one of the best possible method for removing from water. These plants are technically designed with precision to save water and it is easy to install. Moreover, these plants are capable of removing all the mineral content from the water by ion exchange. what are the main types of water softener and how do they work? The most common type of domestic water softener is a unit made of two tanks – a mineral and a saltwater tank – which are connected to your household water pipes. These water softeners work by a process called ion exchange.