Brand: AO Smith
UV water purifier
Our editorial score
Adequate — buy only for its niche
Municipal supply already low in dissolved solids — not for borewell or tanker water
Catalogue listing — not a hands-on review
We have not tested this unit. The specifications below are parsed from the manufacturer's own listing, the features are their wording, and the score is calculated from those specifications rather than assigned by an editor. For models we have examined in depth, see our ranked water purifiers guides.
The AO Smith ProPlanet P4 Pro is a UV water purifier listed by AO Smith at ₹24,900. That is above the ₹17,990 median for the purifiers in this catalogue.
AO Smith publishes little machine-readable specification for this model beyond the purification technology, so the specification table here is deliberately short rather than filled with estimates.
Every figure here is AO Smith's own published specification, read from www.aosmithindia.com on 20 September 2026. This is a catalogue listing, not a review — nobody here has used this purifier, and the score is calculated from the published specs by the method printed on the water-purifier hub. Running cost is a category estimate, not the maker's figure. Check the Amazon and Flipkart links before buying.
Every condition below is derived from this product's published specifications and from how it compares with the water purifiers we track — so you can check each one against your own room, supply or budget rather than take our word for it.
Your supply runs above 200 ppm TDS
It is suited to supply up to about 200 ppm. Above that this technology removes nothing dissolved, so the water will be disinfected but not desalinated.
Purifiers for high-TDS supply →Your area has documented arsenic, fluoride or nitrate contamination
There is no reverse-osmosis stage. UV and UF deal with bacteria, viruses and cysts, and remove nothing dissolved — so against those contaminants this offers no protection at all, whatever the TDS reading says.
Book a NABL lab water test →You live outside a metro or a major service town
AO Smith's service network is rated good rather than excellent. Filter availability and callout times are what decide whether a purifier is still running in five years, and they are worth checking for your pin code before you buy.
How we score service reach →Strong transparency. This is separate from our review score above — it measures how well documented, how supportable and how expensive to own this water purifier is, scored on 4 of 7 axes by formula, with no manual override. See the methodology.
| Axis | Score | Weight | Based on |
|---|---|---|---|
| Documentation | 3.3 | 15% | 4 of 12 tracked specs published |
| Running cost | 9.3 | 20% | ₹1,200 per year |
| 5-year cost of ownership | 7.4 | 20% | ₹30,900 over five years |
| Warranty & free service | Not scored | 12% | Not published |
| Service & parts reach | 6.0 | 15% | AO Smith service network rated good |
| Energy efficiency | Not scored | 8% | Not published |
| Water recovery | Not scored | 10% | Not published |
| Purification | UV |
|---|---|
| Suitable for | Municipal supply that is already low in dissolved solids |
| Estimated running cost/year | ≈ ₹1,200 |
| Variants listed | 1 |
Specifications are from manufacturer literature and were checked at the last price-verification date. Brands occasionally revise stage counts, tank sizes and warranty terms without changing the model name — confirm against the current listing before purchasing.
An American water-heating giant that brought serious engineering to Indian purifiers. AO Smith's Z-series is the benchmark for hot-water-on-tap RO, and its Advanced Recovery Technology genuinely delivers better reject ratios than most competitors. Premium pricing, premium build.
AO Smith
Premium kitchens, high-TDS or brackish supply, and households that drink a lot of tea and coffee.
View details
KENT
Families on borewell, tanker or high-TDS municipal supply who want the safest all-round choice.
View details
LG
Hygiene-focused buyers, humid coastal cities, and anyone who has ever opened a purifier tank and been unpleasantly surprised.
View details
Aquaguard
Buyers who value service reliability and compact design over maximum tank capacity.
View detailsFree consultation · Pan-India
Tell us your city, your water source and your budget. For homes we will recommend the right technology — including telling you when a ₹3,000 purifier is genuinely enough. For offices, societies and factories, our team will size a system against your water report and send a specification-backed quotation.
Or email betterworkindia@gmail.com — attach a water analysis report and we can quote faster.
Homes
Right-sized recommendation for your TDS, not the most expensive unit
Offices & societies
25 LPH to 2,000+ LPH, sized on headcount and feed water
Industry
Pharma, food, textile, boiler feed — engineered to your specification
Service & AMC
Installation, repair and AMC with written response times