A water softener works by removing minerals such as calcium and magnesium ions from the water through a process called ion exchange. The water passes through a tank filled with resin beads that attract and trap the minerals, replacing them with sodium ions. Once the resin becomes saturated with minerals, it is regenerated using salt water, allowing the softening process to continue.

Using a water softener can have several benefits, including softer skin and hair, cleaner and shinier dishes and glassware, reduced soap scum buildup on surfaces, and extended appliance lifespan by preventing scale buildup in pipes and appliances. Additionally, softened water can lead to more efficient cleaning and improved efficiency of water heaters and other household appliances.