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Reverse Osmosis

How Long Do Reverse Osmosis Systems Last?

The system can last a decade. The filters can't. Here's what wears out when, and how to keep your RO water flowing.

H2OGeneration H2OSeptember 27, 2026
A reverse osmosis system being serviced with new filters installed

The System vs the Filters

There's a big difference between how long the system lasts and how long the filters last. The housings, fittings, and storage tank can keep going for 10 years or more. The parts that touch your water — the pre-filters, the membrane, the polishing filter — are consumables that need replacing on a schedule.

The Replacement Timeline

  • Sediment and carbon pre-filters: every 6–12 months
  • Carbon polishing filter: every 6–12 months
  • RO membrane: every 2–5 years (depends on water quality and usage)
  • Storage tank: 8–12 years before it may need replacement

Homes with harder or more sediment-heavy water will replace filters more often. That's normal — it means the filters are doing their job.

How to Make Your System Last

The single best thing you can do is replace the pre-filters on schedule. A clogged pre-filter lets chlorine reach the membrane, and chlorine is what shortens a membrane's life the most. Clean pre-filters protect the expensive part.

We service and maintain reverse osmosis systems throughout the Central Valley — see our reverse osmosis maintenance in Clovis and nearby areas.

Frequently Asked Questions

The membrane typically lasts 2–5 years and the housings can last 10+ years. The pre-filters and polishing filter need replacement every 6–12 months. With regular filter changes, an RO system can serve a home for a decade or more.

Not Sure What’s In Your Water?

Schedule a free in-home water test with Generation H2O. We’ll test your water, explain what we find, recommend the appropriate solution if one is needed, and provide clear pricing before you decide.

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