How Often Should You Change Your RO Filters? Complete Schedule

The Simple Rule: 6 Months, 12 Months, 24-36 Months

Most filters follow a simple rhythm. Pre-filters are changed every 6-12 months, the RO membrane every 2-3 years, and the UV lamp every 12 months. Hard-water cities like Raipur skew toward the shorter end of every range.

Skipping pre-filter changes is the #1 cause of premature membrane failure — a ₹150 filter saves you a ₹1,000+ membrane.

Full Replacement Schedule (2026)

Here is the schedule we recommend for a typical Indian household:

• Sediment filter (PP spun): every 6 months — sooner if the cartridge turns brown
• Pre-carbon (GAC/CTO): every 6-12 months
• Post-carbon / taste enhancer: every 12 months
• RO membrane: every 24-36 months, or when output TDS climbs above 50-100
• UV lamp: every 12 months (8,000-9,000 hours)
• Alkaline/mineral cartridge: every 6-12 months

5 Signs Your RO Needs a Filter Change Today

Your water tastes odd or smells — carbon filters are exhausted. Flow rate has dropped — filters are clogged. Tank takes too long to fill — pre-filters are blocked. Purifier makes noise — pressure issues or a failing pump. TDS of output water is rising — the membrane is worn out.

Any of these means it is time for a service visit. Delaying costs more later.

The Cheapest Way to Never Miss a Change

An AMC plan schedules all filter changes for you at a fixed annual price. Even better, our rental plans include every filter replacement and service visit for free — you will never calculate a replacement date again.