RO Water Purifier Annual Maintenance Schedule — What to Do Every Month

Aqua Product

Most RO purifier problems — low water output, bad taste, dead pump, failed PCB — are caused by one thing: skipping regular maintenance. This complete schedule tells you exactly what to do and when.

An RO water purifier has 5–7 components that wear out at different rates. Missing even one service item can cause a chain reaction — a clogged sediment filter damages the membrane, a failing adapter damages the PCB, an expired UV lamp means unsterilised water. This schedule prevents all of that.

The Complete RO Maintenance Calendar

Every Month

Check water flow rate — fill a 1-litre bottle and time it. Under 10 seconds is good. Slower means a clogged sediment filter.
Wipe the outer body cover — dust and grease accumulate around vents and can affect cooling. Damaged or cracked covers can be replaced.
Check for drips or leaks — inspect all pipe connections and the tap.
Check the adapter temperature — warm is normal, too hot to touch signals a failing adapter.

Every 3 Months

Replace the sediment PP filter — the most critical task. A clogged sediment filter is the #1 cause of RO membrane failure. Cost: ₹150–₹300.
Check input TDS — if TDS has risen sharply, increase service frequency.
Inspect the drain pipe — ensure waste water is flowing freely.

Every 6 Months

Replace the carbon block (CTO) filter — removes chlorine and prevents membrane damage. Cost: ₹200–₹400.
Check output TDS — should be 50–150 TDS lower than input. Lower rejection means a weakening membrane.
Sanitise the storage tank — drain completely and wipe inside with a clean cloth.

Every 12 Months — Full Annual Service

Replace all pre-filters — sediment, carbon block, and any inline pre-filters as a complete set
Replace the post carbon filter
Replace or test the RO membrane — replace if output TDS is more than 70% of input TDS
Replace the UV lamp — UV lamps degrade after 8,000–10,000 hours even if they still glow
Test the booster pump pressure — low pressure means a weakening motor
Inspect the PCB and adapter — look for swollen capacitors, burn marks, or excess heat

Every 18–24 Months

Replace the RO membrane — high-TDS input (above 500 TDS) may require replacement every 12–18 months.
Replace the booster pump if output has slowed despite clean filters and good membrane. Cost: ₹800–₹1,500.

Quick Reference Maintenance Table

Component	Interval	Cost
Sediment PP Filter	3 months	₹150–₹300
Carbon Block Filter	6 months	₹200–₹400
Post Carbon Filter	12 months	₹200–₹350
UV Lamp	12 months	₹400–₹600
RO Membrane	12–24 months	₹800–₹2,000
Booster Pump	3–5 years	₹800–₹1,500
SMPS Adapter	3–5 years	₹399–₹799
PCB (Motherboard)	5–8 years	₹1,200–₹1,800

Total annual DIY maintenance cost: ₹1,500–₹3,000 depending on model and water quality. A brand service visit costs ₹1,500–₹2,500 for labour alone — not including parts. DIY saves 60–70% every year.

Frequently Asked Questions

How do I know when the RO membrane needs replacement?

Measure input and output TDS with a TDS meter. If the purifier is removing less than 60% of TDS (e.g., input 400, output above 160), the membrane needs replacement.

Can I skip the 3-month sediment filter change if flow seems fine?

Not recommended. Sediment buildup is not always visible as reduced flow until the filter is badly clogged. Change it on schedule regardless of apparent flow.

Does the UV lamp need to be changed if it still glows?

Yes. After 8,000–10,000 hours, the lamp may still produce visible light but no longer emits sufficient UV radiation to kill bacteria. Replace annually regardless.