Head to head

AO Smith X7 vs KENT Grand Plus: Which Should You Buy?

Specification comparison between AO Smith X7 and KENT Grand Plus
Specification	AO Smith X7 8.6/10	KENT Grand Plus 8.9/10
Our score	8.6/10	8.9/10
Street price (indicative)	₹23,490	₹16,499
MRP	₹30,000	₹20,500
Brand	AO Smith	KENT
Best for	Buyers who want AO Smith's engineering and water efficiency but do not need hot water.	Families on borewell, tanker or high-TDS municipal supply who want the safest all-round choice.
Annual running cost (indicative)	₹4,000	₹3,500
Purification	RO + SCMT + Mineraliser, 8-stage	RO + UV + UF + TDS Controller
Storage capacity	7 litres	9 litres
Purification capacity	12 litres/hour	20 litres/hour
Max input TDS	2000 ppm	2000 ppm
Water recovery	Advanced Recovery Technology	Up to 50% (Save Water technology)
Power	45 W	60 W
Warranty	2 years on select components	1 year warranty + 3 years free service
Mounting	Wall-mount	Wall-mount or counter-top
Tank material	—	Food-grade plastic
Filter life	—	RO membrane ~12 months, sediment/carbon ~6 months
Dimensions	—	39.5 x 26.5 x 55.5 cm
Purification score	9.1	9.2
Build quality score	9.2	8.5
Value for money score	8.2	8.8
Running cost score	8.7	8.4
Service network score	8.2	9.5
Pros	Same build quality and recovery technology as the Z9 for ₹10,000 less Excellent purification with silver-charged membrane technology Two-year warranty coverage on key components	Handles input TDS up to 2,000 ppm, which covers almost every Indian borewell Save Water technology recovers roughly 50% versus the 20-25% of older RO designs TDS controller lets you dial mineral retention rather than stripping the water flat 9-litre tank is genuinely enough for a family of five during a supply cut
Cons	No hot water, which is the Z9's headline feature 7-litre tank is mid-sized Same service-coverage caveat as all AO Smith units	Bulky and visually dated; it will dominate a small kitchen wall UV lamp is a serial consumable and adds to the AMC after year three No hot water option in this model
Where to buy	Amazon Flipkart	Amazon Flipkart

Choose the AO Smith X7 if…

Same build quality and recovery technology as the Z9 for ₹10,000 less
Excellent purification with silver-charged membrane technology
Two-year warranty coverage on key components

₹23,490 · Full review

Choose the KENT Grand Plus if…

Handles input TDS up to 2,000 ppm, which covers almost every Indian borewell
Save Water technology recovers roughly 50% versus the 20-25% of older RO designs
TDS controller lets you dial mineral retention rather than stripping the water flat
9-litre tank is genuinely enough for a family of five during a supply cut

₹16,499 · Full review

The deciding factors

If someone asks for one water purifier recommendation without telling me anything about their water, this is the answer. The Grand Plus is not the prettiest or the cheapest unit in this list, but it is the most consistently correct one: an RO membrane rated to 2,000 ppm input, UV and UF stages behind it, and a TDS controller so that low-TDS supply does not get stripped to tasteless.

Against that, AO Smith X7 makes its case differently: The X7 is the smart-money AO Smith. You keep the build quality, the silver-charged membrane and — crucially — Advanced Recovery Technology, which is the brand's genuine engineering advantage. You give up hot water and drop from a 3,000 ppm to a 2,000 ppm input rating, which still covers the overwhelming majority of Indian supply.

Our practical advice: unless the KENT Grand Plus's specific advantages match a real constraint you have — tank size for long water cuts, a higher TDS rating for brackish supply, hot water you will genuinely use — the cheaper unit is the better purchase. In this category, paying for capability you will never use is the most common way money gets wasted.

Frequently asked questions

AO Smith X7 or KENT Grand Plus — which is better?

On our overall scoring, the KENT Grand Plus edges it at 8.9/10 against 8.6/10. Families on borewell, tanker or high-TDS municipal supply who want the safest all-round choice. But the KENT Grand Plus is cheaper at ₹16,499, and if the specific advantages of the KENT Grand Plus do not apply to your situation, the cheaper unit purifies water just as safely.

What is the price difference between AO Smith X7 and KENT Grand Plus?

The AO Smith X7 is around ₹23,490 and the KENT Grand Plus around ₹16,499 — a difference of about ₹6,991. Both are indicative street prices that change frequently, so verify on the marketplace before buying. Also compare annual running cost, which can differ by more than the purchase price over five years.

Which handles high TDS water better, AO Smith X7 or KENT Grand Plus?

The AO Smith X7 is rated for input TDS up to 2000 ppm and the KENT Grand Plus up to 2000 ppm. They are equally capable on this measure, so decide on tank size, running cost and service instead.

Still undecided?

Tell us your city, your water source and your TDS if you know it, and we will tell you which of these two is right for you — or whether a third option fits better.