Kent Grand Plus RO Water Purifier Review: Is It the Best Buy in 2026?
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The Kent Grand Plus is one of the most purchased RO water purifiers in India. It carries a 4.3-star rating on Amazon, ISI certification, a 20 LPH purification rate, and a UV LED inside the storage tank, a feature that keeps purified water sterile even after it sits for hours. At Rs. 15,999 with 4 years of free service included, it is a strong option for families wanting reliable purified water without the long-term service cost headache. This review covers purification technology, TDS control, storage, installation, service, and long-term value so you can decide with confidence.
Specifications at a Glance
| Feature | Details |
|---|---|
| Model | Kent Grand Plus |
| Purification Technology | RO + UV + UF + TDS Control + UV LED Tank |
| Storage Capacity | 9 Litres |
| Purification Rate | 20 Litres Per Hour |
| Filtration Level | 0.0001 micron |
| Input TDS Range | Up to 2,000 ppm |
| Auto Flush | Yes |
| ISI Certified | Yes (IS 10500) |
| Free Service Period | 4 Years |
| Price | Rs. 15,999 |
| Amazon Rating | 4.3 out of 5 |
Kent Grand Plus RO Water Purifier
RO+UV+UF+TDS | UV LED Tank | 9L | 20 LPH | 4-Year Free Service
Purification Technology: RO + UV + UF
The Kent Grand Plus uses a multi-stage purification process combining Reverse Osmosis, Ultraviolet disinfection, and Ultrafiltration. Each stage targets different contaminants. RO removes dissolved salts, heavy metals like lead and arsenic, fluoride, nitrates, and most bacteria and viruses by forcing water through a semi-permeable membrane at 0.0001 micron , the smallest filtration level available in home water purifiers. This removes particles that boiling alone cannot address.
The UV stage uses an ultraviolet lamp to deactivate bacteria, viruses, and cysts that survive the pre-filtration stage. UV does not remove dissolved solids but eliminates biological contamination with high effectiveness. The UF stage adds a physical membrane barrier as a final polishing step, catching any remaining suspended particles. Together, the three-stage combination ensures that both dissolved chemical contaminants and biological pathogens are addressed in a single pass.
The unit is certified to IS 10500, the Bureau of Indian Standards specification for drinking water quality. This is the benchmark certification that confirms the output water meets Indian drinking water standards , not just a brand claim but an independently verified specification.
UV LED Tank Sterilisation
This is the feature that distinguishes the Kent Grand Plus most clearly from standard RO+UV+UF purifiers. After water passes through all purification stages and enters the 9-litre storage tank, a UV LED lamp continues operating inside the tank. This keeps the stored water sterile even when it has been sitting in the tank for several hours.
Why does this matter? Once purified water enters a closed tank, bacterial regrowth is possible over time , particularly in warm Indian summers where tank temperatures can rise. Standard RO purifiers without tank sterilisation rely on the initial UV pass being sufficient. The Kent Grand Plus eliminates the risk of regrowth by maintaining UV exposure in the stored water continuously. For families in hot climates or those who fill the tank in the evening and draw from it through the next day, this is a meaningful health benefit with no ongoing cost.
TDS Controller
Reverse osmosis removes a large proportion of dissolved minerals from water along with contaminants. Long-term consumption of very low-TDS water is not ideal , essential minerals like calcium and magnesium are also removed. The Kent Grand Plus addresses this with a TDS controller that mixes a small, controlled amount of filtered bypass water back into the purified RO output before it enters the tank.
The bypass water has been through pre-filters (sediment and carbon) but not through the RO membrane. Blending a small proportion back into the RO output restores calcium, magnesium, and trace minerals to the final water, keeping the output TDS in a healthy range , typically 75-150 ppm when configured correctly. This results in drinking water that tastes better (very low TDS water can taste flat) and retains the mineral content your body needs. The TDS controller is adjustable by a Kent technician during installation based on your local input water quality.
Storage and Purification Speed
The Kent Grand Plus holds 9 litres of purified water. For a family of 4-5, this covers drinking, cooking, and some washing needs through a typical power cut of 4-6 hours. The tank refills automatically when the water level drops, so you rarely experience the tank running empty under normal usage. For larger families of 6+, the 9L tank is still sufficient for drinking needs, though cooking water draws may require slightly more planning during extended outages.
The purification rate is 20 litres per hour. At that speed, the tank refills from empty in under 30 minutes. For comparison, many mid-range RO purifiers in India are rated at 8-12 LPH, which means a half-empty tank takes 45-60 minutes to refill fully. The Kent’s 20 LPH rate effectively makes wait time a non-issue in daily use , the tank is always full before you need to draw from it again.
Design and Installation
The Kent Grand Plus is a wall-mounted unit with a clean white and blue design that fits most Indian kitchen aesthetics. The compact footprint takes up a standard section of wall above a sink or counter. The unit includes a tap on the front face for dispensing water and a filter change indicator light that alerts when a cartridge needs replacement.
Installation is handled by a Kent technician who visits within 48 hours of purchase (in most metro and Tier 1 cities). The installation cost is typically included in the purchase price or covered under the free service plan. The unit requires a standard tap water inlet connection and a power socket. An overhead elevated water source is not required , the booster pump inside handles a low-pressure supply adequately.
Auto Flush
The auto flush feature on the Kent Grand Plus automatically cleans the RO membrane at set intervals by flushing accumulated contaminants and dissolved solids off the membrane surface. Without regular flushing, rejected contaminants build up on the membrane and reduce its effectiveness and lifespan over time , a process called membrane fouling.
Auto flush eliminates the need for manual membrane cleaning between service visits. It extends the RO membrane life, maintains consistent purification performance between service intervals, and reduces the frequency of costly membrane replacements. For users in areas with high TDS borewell water, where membrane fouling happens faster, the auto flush feature is particularly valuable.
Free Service and AMC
The most underrated advantage of the Kent Grand Plus for long-term buyers is the 4-year free service period included in the purchase. RO purifiers require regular filter replacements and annual maintenance. Sediment and carbon pre-filters need replacement every 6-12 months. The RO membrane lasts 12-24 months, depending on water quality and usage. UV lamps need checking annually. Each service visit with parts replacement costs Rs. 2,000-4,000 in the open market.
Over 4 years, this adds up to Rs. 8,000-16,000 in service costs , costs that Kent absorbs entirely under the free service plan. Technicians visit for scheduled maintenance, filter replacements, and any performance issues within the 4-year window at no additional charge. Kent has 1,500+ service centres across India with relatively fast dispatch in major cities. After the 4-year free period, standard AMC plans from Kent are competitively priced relative to the open market.
Pros and Cons
- UV LED tank sterilisation keeps stored water safe
- TDS controller retains essential minerals
- 20 LPH purification rate , fast refill
- 9L storage for large families
- 4 years of free service included
- 0.0001 micron filtration , highest precision
- ISI certified (IS 10500)
- Auto flush extends membrane life
- Strong nationwide service network
- No Copper or Zinc mineral enrichment
- Rs. 15,999 , premium price point
- Not suitable for TDS above 2,000 ppm
- Water wastage during the RO process (standard for all RO purifiers)
- Service quality varies by city and technician
Final Verdict
The Kent Grand Plus earns its position as one of India’s best-selling RO water purifiers for good reason. The UV LED tank sterilisation is a feature most competing purifiers at this price point do not offer. The TDS controller ensures the output water is healthy and mineral-balanced. The 20 LPH speed and 9L storage cover large families comfortably. And 4 years of free service included in the purchase price makes the total ownership cost significantly more competitive than the sticker price suggests.
If your household needs Copper or Zinc mineral enrichment specifically, the AquaGuard Aura addresses that. For everything else , purification quality, tank protection, storage, speed, and service , the Kent Grand Plus is the most complete option in this price range. It is recommended for most Indian families to upgrade to or replace an RO purifier in 2026.
Related Reading
- Kent Grand Plus vs AquaGuard Aura: Which RO Purifier Should You Buy?
- How to Choose a Water Purifier in India: Complete Buying Guide
- Best Air Fryers Under Rs. 5,000 in India (2026)
Frequently Asked Questions
What input water TDS can the Kent Grand Plus handle?
The Kent Grand Plus is rated for input water TDS up to 2,000 ppm. This covers most municipal tap water and borewell sources across Indian cities. For input TDS above 2,000 ppm , found in some borewell sources in coastal or arid areas , you need a commercial-grade RO system. If you are unsure of your local TDS, Kent provides a free water quality test during the installation visit.
How much water does the Kent Grand Plus waste?
RO purifiers reject a portion of input water as waste water containing the concentrated contaminants. The Kent Grand Plus typically produces 1 litre of reject water for every 3 litres of purified output (a 1:3 reject-to-purify ratio). This is standard for home RO purifiers. The reject water is not unusable , it can be directed to household plants, mopping floors or flushing toilets to reduce waste.
What does the 4-year free service actually cover?
The 4-year free service on the Kent Grand Plus covers scheduled maintenance visits, filter replacements (sediment, carbon and UF filters), technician labour and any repairs covered under the warranty terms. The RO membrane replacement may or may not be covered depending on the specific service plan terms , confirm this with the Kent technician during installation. AMC terms are sometimes updated, so verify the current coverage directly with Kent at time of purchase.
Can I install the Kent Grand Plus myself without a technician?
Installation is possible for experienced DIYers but is not recommended. The Kent Grand Plus requires water inlet connection, drain line routing for reject water and wall mounting. Incorrect installation can void the warranty. Kent provides free technician installation in most cities as part of the purchase. Use that service , it is included and ensures the TDS controller and booster pump are calibrated correctly for your local water quality.
How long do the filters last on the Kent Grand Plus?
For the Kent Grand Plus, sediment and pre-carbon filters typically need replacement every 6-12 months. The RO membrane lasts 12-24 months depending on input TDS and daily usage volume. The UV lamp needs checking annually. The UF membrane typically lasts 2-3 years. Under the 4-year free service plan, Kent handles all of these replacements during scheduled visits , you do not need to track them separately.
Is the Kent Grand Plus suitable for borewell water?
Yes, for borewell water with TDS up to 2,000 ppm, the Kent Grand Plus is well suited. The RO stage removes dissolved solids and heavy metals common in borewell water. For very high TDS borewell water (above 1,500 ppm), filter replacement frequency increases and the RO membrane may need replacing more often. The auto flush feature helps manage membrane fouling, which is faster with high-TDS input water.
