The short answer
Salt cells typically last about 3 to 7 years (roughly 5,000 to 10,000 operating hours). They wear faster when run at high output, with low salt, or when scale is cleaned off with strong acid too often. When a clean cell with correct salt no longer keeps chlorine up, replace it.
Signs it's done
- The controller reports low output or 'inspect cell' after cleaning.
- Chlorine won't hold even at high output with correct salt and stabilizer.
- Visible plate coating has worn through.
Choosing a replacement
Match the control board's family: Hayward boards take TurboCell sizes such as the TurboCell 40,000 gal, Pentair boards take IntelliChlor cells such as the IC40. Compatible third-party cells exist; check the listing's fit statement and warranty.
Make it last
- Keep salt in the maker's range.
- Run at the lowest output that holds chlorine.
- Clean only when scale shows, with the maker's method.
Products mentioned
Questions readers ask
Can I use a bigger cell than my old one?
Often yes within the same family, and it runs at a lower setting; check the board supports it.
Why does my salt cell keep scaling?
High pH and calcium hardness speed scaling; balance the water and clean only as needed.