AO Smith Z9 review: 8-stage RO with 45°C and 80°C hot water, but no app
AO Smith Z9 in India at about ₹24,700: 8-stage RO with SCMT, mineralised hot water at 45°C and 80°C, but only a 1-year warranty and no app.
- Tested for Testing in progress
- We bought this unit
Where to buy
- Flipkart ₹24,667Check price
MRP ₹32,500
Prices checked 31 Oct 2026. Prices change often. Plain retailer links — we earn no commission when you buy.
Disclosure: Draft: specs come from AO Smith India’s page and the Flipkart listing, which disagree on the display. Our own measurements are in progress and the scores are provisional.
The verdict
The AO Smith Z9 is an 8-stage RO plus silver-charged purifier with mineralised hot water at 45°C and 80°C from a steel tank, for about ₹24,700. It has no app and only a 1-year comprehensive warranty, so it suits buyers who want hot water and a known brand but not smart features.
Best for
- Buyers who want hot water and warm water from a trusted RO brand and do not need an app
- Borewell or mixed-source water up to 2,000 TDS
Skip it if
- You want app monitoring of TDS and filter health
- You want more than a 1-year comprehensive warranty
What we like
- 8-stage RO with Silver Charged Membrane Technology, rated for up to 2,000 TDS, about 95% TDS reduction and more than 55% recovery
- Mineralised hot water at 45°C (warm) and 80°C (hot) from a 0.8 L stainless-steel tank, alongside a 9.2 L purified tank
- Advance Alert Technology signals when filters or the RO membrane need replacing
- Works with borewell, mixed and tanker water; wall-mount or table-top
What we don’t
- No app or smart connectivity: the Z9 only gives on-unit alerts
- Only 1-year comprehensive warranty plus a 1-year RO membrane warranty (TDS under 2,000 ppm and hardness under 400 ppm)
- Flow is up to 15 L/hour, the slowest rate in this comparison, and the hot tank is only 0.8 L
- Official page lists a digital display; the Flipkart listing mentions only a cartridge life indicator
- Replacement filter and membrane prices are not published on the page
Score breakdown
- Purification and water quality
- 8.0
- Hot water and features
- 8.0
- App and monitoring
- 3.0
- Warranty and service
- 6.5
- Value
- 7.0
In this review
How we tested
We compare premium purifiers on the same checklist: purification and input-water limits, hot water, mineral control, what the sensors measure, how good the app is, warranty and service, and price. Specs here come from AO Smith India and retailer listings; our measurements are being added.
Purification and hot water
Eight stages with a side-stream RO membrane and a silver-charged post filter, rated for up to 2,000 TDS. The mineraliser adds minerals back. Hot water comes at two settings, 45°C and 80°C, from a 0.8 L stainless-steel tank, so it suits a few cups at a time rather than constant use.
What it lacks: any app
The Z9 has no app and no Wi-Fi. Its Advance Alert Technology only signals when the filters or membrane are due, which is a usage-based reminder. It does not show TDS, so you cannot see how well it is working without a handheld meter. That is simpler, but it is not “smart”.
Warranty and service
One year comprehensive plus a one-year membrane warranty under TDS and hardness limits. That is the shortest warranty here next to Eureka Forbes. Service is on-site by registration.
Should you buy it?
Buy it if you want warm and hot mineralised water from an established RO brand and can live without an app. If you want monitoring and a longer warranty, choose the Boon Homie Pro or Urban Company.
Key specs
| Type | Water purifier, RO + SCMT, hot water |
|---|---|
| Purification | 8 stages: pre-filter, sediment, carbon block, ART, side-stream RO membrane, MIN-TECH mineraliser, silver post-carbon/SCMT |
| Tank | 9.2 L purified tank + 0.8 L stainless-steel hot tank (10 L total) |
| Hot water | Warm 45°C and hot 80°C (±5°C), mineralised, from a stainless-steel tank |
| Mineral control | MIN-TECH mineraliser; no selectable modes |
| Input TDS limit | Up to 2,000 ppm |
| Purification rate | Up to 15 L/hour; 60 W; recovery above 55% |
| Sensors and what they measure | No TDS or water-quality sensor shown; Advance Alert Technology signals filter and membrane replacement (a usage-based alert) |
| App and IoT | None |
| App rating and reliability | Not applicable: no app |
| Display | Digital display per AO Smith; Flipkart lists only a cartridge indicator and alarms |
| Warranty | 1 year comprehensive (filters and membrane) + RO membrane warranty if TDS under 2,000 ppm and hardness under 400 ppm; plastic and cosmetic parts excluded |
| Running cost | Not published |
| Service | On-site service by registering via phone or email |
| Reported price | About ₹24,667 on Flipkart per a tracker; MRP ₹32,500 |
| Claims to verify | "Only 5-star rated RO with mineralised hot water", 2X water saving and 9,000 L saved a year are AO Smith claims; Flipkart lists power type inconsistently |
Questions buyers ask
Does the AO Smith Z9 have an app?
No. The Z9 has no app or Wi-Fi. It signals when the filters and RO membrane need replacing, but it does not show TDS or water quality.
What hot water does the AO Smith Z9 give?
Warm water at 45°C and hot water at 80°C (each ±5°C), mineralised and stored in a 0.8 L stainless-steel tank.
What warranty does the AO Smith Z9 have?
One year comprehensive, plus a one-year RO membrane warranty if input TDS is under 2,000 ppm and hardness under 400 ppm. Plastic and cosmetic parts are excluded.
