Best RO Water Purifier With Large Tank for a Big Family India 2026

The best RO water purifier with a large tank for a big family in India is a wall-mounted RO plus UV model with a 10 to 15 litre tank, a high purification rate and TDS control, from brands such as Kent, Aquaguard, Livpure and AO Smith, priced roughly between ₹15,000 and ₹35,000. A bigger tank means more water on hand during peak times, which matters for families of six or more.

Purifiers here are researched from listings and brand pages, not hands-on tested. Two figures decide whether a purifier keeps up with a large household, the stored litres and the litres per hour it makes, and both vary even within one brand, so read each listing for the exact numbers.

Prices below are approximate and can change during sales, so check the live price on Amazon before you buy.

Quick Pick: Compare 10 to 15 litre RO plus UV purifiers from Kent and Aquaguard with TDS control, roughly ₹18,000-30,000. Check large tank RO purifiers on Amazon

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1. Kent Large Tank RO Purifiers

Roughly ₹15,000-30,000. Kent offers RO plus UV and UF models with tanks of 8 to 10 litres and above on selected models, with TDS control and wide service reach.

Kent's wide service network makes finding a technician easier in most cities. Make sure the exact model you pick has the larger tank, since many Kent units hold less.

Search Kent large tank purifiers on Amazon

2. Aquaguard Large Tank Purifiers

Roughly ₹15,000-35,000. Aquaguard, from Eureka Forbes, offers large-capacity RO plus UV models with mineral features and a broad service network.

Aquaguard leans on its mineral-retention features and long-running brand presence. As with Kent, compare the stated tank litres across variants before you commit.

Search Aquaguard large tank purifiers on Amazon

3. Livpure Large Tank Purifiers

Roughly ₹15,000-25,000. Livpure sells RO plus UV purifiers with large tanks and a variety of designs at moderate prices.

Livpure often prices below the biggest names, which helps a big-family budget. Service quality depends on your city, so ask for local reviews before buying.

Search Livpure large tank purifiers on Amazon

4. AO Smith Purifiers

Roughly ₹15,000-35,000. AO Smith offers RO plus UV models, some with larger tanks and features such as mineral control.

AO Smith is known for sturdy build and sensible features. Not every model has a big tank, so shortlist only those that list the capacity you want.

Search AO Smith water purifiers on Amazon

5. Pureit and Havells Options

Roughly ₹15,000-25,000. Pureit and Havells offer RO models, including some with larger storage tanks.

Both are worth checking if you want an alternative to the big three in your area. Compare filter replacement costs, since consumables drive long-term spend.

Search Havells water purifiers on Amazon

6. Booster Pump and Storage Considerations

Some large tank models include booster pumps for low-pressure supply, and a larger tank may need more wall space. Check pressure at your tap before buying.

If your tap pressure is weak, a built-in booster pump is the difference between a tank that refills and one that stays half empty. The extra pump is one more part that may need service.

Search RO purifiers with booster pump on Amazon

How to Choose a Large Tank RO

Match tank size to usage. A big family may need 10 to 15 litres of storage, with a purification rate of around 15 to 25 litres per hour or more.

Check technology for your water. RO handles high TDS, UV and UF protect against microbes, and TDS control keeps some minerals in.

Look at service and water waste. RO systems reject water, so check recovery and use reject water for cleaning where possible.

Installation and Maintenance

Mount the unit at a comfortable height near a power point and the water supply, and plan for drainage of reject water. Service filters on schedule and clean the tank periodically.

Daily Capacity Versus Tank Size

Tank size is only part of the story, because the purification rate decides how fast the tank refills. A family that uses a lot of water in the morning needs a tank that holds enough for peak demand and a purifier that refills it by evening. Ask for both the tank capacity and the litres per hour rating, and compare them to your daily use.

Who Should Skip This

If your household is only three or four people, a 10 to 15 litre unit is more tank than you need and takes more wall space. Water also sits in a big tank for longer, so low usage can leave it stale. A compact model with a smaller tank and a good purification rate is the better fit for small families.

Recommendation

For most big families, a 10 to 15 litre RO plus UV purifier from Kent or Aquaguard with TDS control is a practical choice.