When to Change Your RO Filter (RO ফিল্টার কখন পরিবর্তন করবেন)
A clear replacement schedule for every RO stage — sediment, carbon, membrane and mineral — and the warning signs that a filter is finished.
Changing RO filters on time is the single most important thing you can do for safe water and a long-lasting purifier. Each stage wears out at a different speed.
RO filter replacement schedule
| Stage | Replace every | Job |
|---|---|---|
| Sediment (PP) | 3–6 months | Traps sand, rust and dirt |
| Pre-carbon | 6–12 months | Removes chlorine and odour |
| RO membrane | 1.5–2 years | Removes dissolved salts and metals |
| Post-carbon | 6–12 months | Polishes taste |
| Mineral / alkaline | 12 months | Adds back minerals |
Homes on tank or tubewell water with heavy sediment may need the sediment cartridge changed every 2–3 months.
Warning signs a filter is finished
- Water flow has become slow
- The water tastes or smells different
- TDS reading is higher than before
- The pump runs longer than usual
- It has been more than a year since the last change
Can I change RO filters myself?
Sediment cartridges are simple to swap. The membrane and inline filters need careful fitting to avoid leaks, so most families prefer a technician. Our cartridge replacement service brings genuine filters and tests the water after fitting.
Shop replacement parts in water filter cartridges.
Need help? Book our RO water purifier service or call us — a technician can test your water and recommend the right solution.
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