Best AO Smith Water Purifier Review in 2025
Clean and safe drinking water is not just a necessity—it’s a health investment. With rising pollution, impure water, and high TDS levels in many regions of India, water purifiers have become an essential part of every home. Among the top global brands, AO Smith water purifiers stand out for their premium build quality, advanced purification stages, and long-lasting performance.
In this article, we’ll review the best AO Smith water purifiers in 2025, discuss their features, pros and cons, compare them with alternatives, and help you choose the right one for your family.
Quick Comparison – Best AO Smith Water Purifiers in 2025
| Model | Storage | Purification | Special Features | Best For | Price Range |
|---|---|---|---|---|---|
| AO Smith Z9 Pro | 10L | 8-Stage RO+SCMT+Copper+Alkaline+Mintech | Hot water (45°–80°C), Premium design | Large families, tea/coffee lovers | ₹27,000 – ₹30,000 |
| AO Smith Z2+ | 5L | 6-Stage 100% RO + Min-Tech | Under-the-counter, Compact | Small families, modern kitchens | ₹15,000 – ₹18,000 |
| AO Smith Z5 | 7L | 8-Stage RO+SCMT + Alkaline Mineralizer | Digital display, UV in tank | Families in high TDS areas | ₹20,000 – ₹23,000 |
| AO Smith Z1 | 10L | UV+UF (For low TDS water) | Hot water (45°–80°C), Stylish wall-mount | Municipal water supply homes | ₹15,000 – ₹17,000 |
1. AO Smith Z9 Pro Black Instant Hot & Ambient Water Purifier
The AO Smith Z9 Pro is one of the most advanced water purifiers available in India. It combines 8-stage purification with copper, alkaline, and SCMT technology to deliver safe, tasty, and mineral-rich water.
🔹 Key Features:
- 8-Stage purification (RO+SCMT+Min-Tech+Copper+Alkaline)
- 10L stainless steel storage tank
- Instant hot water (45°C to 80°C)
- Smart digital display with filter alerts
- Child lock for safety
- Stylish premium design
Pros:
- First domestic RO with hot water option (great for tea, coffee, or warm drinking water).
- Retains essential minerals for healthy taste.
- LED indicators make it user-friendly.
- Excellent customer support in most cities.
Cons:
- Requires electricity to dispense water.
- Slight water drips when lifting the faucet.
⭐ Verdict:
If you want a premium water purifier with hot water functionality, the Z9 Pro is the best choice in India. Ideal for families with kids and elders.
2. AO Smith Z2+ Water Purifier (Under-the-Counter Model)
The Z2+ is a compact under-the-sink water purifier that saves kitchen space while delivering pure and safe drinking water. It uses 6-stage 100% RO purification with Min-Tech to retain essential minerals.
🔹 Key Features:
- 6-Stage RO purification
- 5L storage tank
- Compact under-the-sink design
- Silent operation – no refilling noise
- Provides 20 TDS output
Pros:
- Saves counter space – perfect for modular kitchens.
- Good build quality and quiet operation.
- Customer service is proactive and reliable.
- Easy to integrate with custom taps.
Cons:
- No TDS adjustment feature.
- Installation may require countertop drilling.
- Only 5L capacity – not ideal for large families.
⭐ Verdict:
A value-for-money under-the-counter purifier that works well for small families and modern kitchens.
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3. AO Smith Z5 Water Purifier
The AO Smith Z5 is designed for homes with high TDS levels. It uses 8-stage purification including RO, SCMT, and Alkaline Mineralizer, ensuring safe and mineral-rich drinking water.
🔹 Key Features:
- 8-Stage purification
- Alkaline Mineralizer – adds healthy minerals
- Digital display with filter alerts
- 7L storage capacity
- UV lamp in storage tank for extra safety
Pros:
- Produces natural-tasting alkaline water.
- Sleek design with informative digital display.
- UV in tank keeps water bacteria-free.
- Reliable flow rate and quick installation.
Cons:
- Annual maintenance cost is higher (~₹6,000).
- Slightly bulkier than Z2+.
⭐ Verdict:
Best for families who want alkaline water and advanced purification. Perfect balance between premium features and price.
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4. AO Smith Z1 UV + UF Hot Water Purifier
The AO Smith Z1 is a UV + UF purifier (not RO) designed for low TDS municipal water. Its biggest highlight is the hot water dispensing feature.
🔹 Key Features:
- UV + UF purification (Not for borewell/tanker water)
- 10L storage
- Hot water option – 45°C for drinking, 80°C for cooking
- Wall-mount premium design
Pros:
- Excellent for municipal water (TDS < 200).
- Hot water in 1.5–3 minutes.
- Premium design with LED display.
- Easy to use and maintain.
Cons:
- Not suitable for borewell or tanker water.
- AMC is on the higher side.
- Hot water dispensing requires a full tank.
⭐ Verdict:
If your home has low TDS supply water, the Z1 is perfect for safe drinking and instant hot water convenience.
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Buying Guide – How to Choose the Best AO Smith Water Purifier in 2025
- Check Your Water Source:
- Municipal water (low TDS < 200): Go for UV + UF models (Z1).
- Borewell/Tanker water (high TDS > 200): Go for RO models (Z5, Z2+, Z9 Pro).
- Family Size & Storage Capacity:
- Small family (2–4 members): 5L storage (Z2+) is enough.
- Large family (4–7 members): 7–10L storage (Z5, Z9 Pro, Z1) is better.
- Special Features:
- Want hot water for tea/coffee/kids? Choose Z9 Pro or Z1.
- Need space-saving purifier? Choose Z2+ under-the-sink.
- Want alkaline water + mineral retention? Choose Z5 or Z9 Pro.
- Budget Considerations:
- Entry-level: AO Smith Z1/Z2+ (₹15K–₹18K)
- Mid-range: AO Smith Z5 (₹20K–₹23K)
- Premium: AO Smith Z9 Pro (₹27K–₹30K)
FAQs – AO Smith Water Purifiers
Q1. Is AO Smith better than Kent or Aquaguard?
Yes. AO Smith offers longer RO membrane life, SCMT technology, and better build quality compared to most Indian brands.
Q2. What is SCMT in AO Smith purifiers?
SCMT = Silver Charged Membrane Technology, which provides double protection against microbial contamination after RO filtration.
Q3. Does AO Smith Z9 Pro work without electricity?
No, water dispensing requires electricity. If you want non-electric dispensing, AO Smith Z8 is a better option.
Q4. How much does AO Smith AMC cost?
On average, ₹5,000–₹7,000 annually depending on the model and filters.
Q5. Which AO Smith purifier is best for borewell water?
Z5 or Z9 Pro – both are designed for high TDS borewell/tanker water.
Final Verdict – Which AO Smith Water Purifier Should You Buy?
- Budget Buyers (₹15K–₹18K): Go for AO Smith Z1 (UV+UF) or Z2+ (RO under sink).
- Best Mid-Range Choice (₹20K–₹23K): AO Smith Z5 – great balance of features, alkaline water, and digital display.
- Premium Pick (₹27K–₹30K): AO Smith Z9 Pro – India’s only RO with instant hot water feature, premium design, and advanced filtration.
