These devices are designed to remove impurities from the water supply before it enters a washing machine. Sediment, chlorine, and other minerals can be filtered, leading to improved washing machine performance and longevity. An inline filter installed on the water supply line is a common example.
Cleaner water benefits both the appliance and the laundry itself. By reducing scale buildup, these filters help protect internal components like heating elements and valves, prolonging the machine’s lifespan. They can also contribute to brighter, softer clothes by preventing mineral deposits from dulling fabrics or making them feel stiff. Historically, concerns about hard water led to various solutions, from in-wash additives to external filtration systems, evolving into today’s sophisticated devices.