RO or non-electric gravity purifier — which should I buy?

It depends entirely on your water source. RO purifiers (like the KENT Grand RO or Pureplus) reduce TDS and remove dissolved salts, essential for borewell, tanker, or hard water. Non-electric gravity purifiers (like the Pureit Classic) and UV+UF purifiers (like the KENT Ultra Storage or Aquaguard Sure Delight UV+UF) do NOT reduce TDS, so they only suit already-good municipal water. Test your water's TDS with a cheap home TDS meter before deciding; a reading above about 200 ppm means you need RO.

Which water purifier brand is best in India — KENT, Aquaguard, or Pureit?

Each has a strength. KENT's Grand RO is our Best Overall (4.4★ from over 8,000 ratings) and its Supreme Plus is the most-reviewed purifier we list. Aquaguard (Eureka Forbes) has the widest range we list, including 2-year filter life and 4-year unconditional-warranty models. Pureit (HUL) offers WQA-certified RO purifiers under ₹9,000. Native (by Urban Company) offers 2-3 years of unconditional, no-service cover.

How much does a good water purifier cost in India?

In our list: a non-electric gravity purifier costs about ₹3,000 (only for good municipal water). RO purifiers from small online brands start at about ₹4,200, and from the big brands at about ₹7,500. Mainstream KENT, Aquaguard and Pureit RO purifiers run ₹8,000-15,000. Premium options with alkaline/copper, smart tracking, touch dispensing or hot water run ₹17,000-27,000.

Is RO water purifier necessary for municipal water in India?

Not always. If your municipal water TDS is genuinely below 200 ppm, a UV+UF purifier (no RO membrane), like the KENT Ultra Storage or Aquaguard Sure Delight UV+UF, retains natural minerals and wastes no water, since it has no reject-water stream. RO becomes necessary once TDS climbs above roughly 200-300 ppm, or for borewell/tanker water, which is common outside major metro municipal-supply areas.

How often should I change my water purifier filters in India?

Sediment and pre-filters typically need changing every 4-6 months; the RO membrane usually lasts 12-24 months depending on input water quality; UV lamps need replacement roughly once a year regardless of visible performance. Models with 2-year filter life (several Aquaguard models) or 2-3 year no-service warranties (Native, Livpure Allura Prime, Aquaguard Aspire Glow) reduce this. Don't wait for a taste change — bacterial protection degrades before taste does.

Does RO purifier waste a lot of water in India?

Standard RO systems reject 50-70% of input water as waste during purification — a real concern in water-stressed Indian cities. Newer models claim higher recovery: Aquaguard says its Delight Aquasaver recovers 60% more water than older RO purifiers, and Pureit says its Eco Elite 2X saves up to 50%. Non-RO UV+UF purifiers (for already-low-TDS water) have zero reject water since there's no membrane to reject through.

What is the ideal TDS level for drinking water in India?

BIS (Bureau of Indian Standards) considers 500 ppm the acceptable upper limit, but most purifier brands target 80-150 ppm as the ideal range for taste and mineral balance — too low (under 50 ppm) actually strips beneficial minerals your body needs. If your RO purifier has a TDS Adjuster, use it to keep output in the 80-150 ppm range rather than the lowest possible setting.

Best Water Purifiers in India (2026)

Water purifiers for Indian homes, each rated 4★ or higher on Amazon with real monthly sales: RO, UV+UF, non-electric gravity and alkaline/copper models, matched to your water source (municipal, borewell or tanker).

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