Water softeners are built to last for at least 10 years. When properly maintained, the softeners can last several years beyond that time.
The exact length of time a water softener will last depends on several things: one being the type of water put through it. When heavy loads of water are put through the softener on a daily basis, homeowners can expect a shorter life for their machine. The same is true if the area is prone to extremely hard water because lime and other deposits can build up throughout the machine. To extend the life of a water softener, users should clean not only the machine but the area around it to keep dust and dirt to a minimum.