How long does water softener resin last?

Water softener resin commonly lasts around 10 to 15 years under favorable conditions. Its service life can be shorter when it is repeatedly exposed to high iron, sediment, chlorine, organic matter, or other substances that foul or damage the beads.

Declining capacity, frequent regeneration, and the return of hard-water symptoms can indicate worn or contaminated resin. Testing and a system inspection can determine whether the resin needs cleaning or replacement.