6+ Best Under Sink Water Purifier in India 2022 – Reviews + Guide

Planning to buy under sink water purifier?

We have come up with a list of best under sink water purifiers in India. This list along with the buying guide will help you make an informed decision.

Also, do not forget to read out buying guide at the end of the post for better understanding.

Best Under Sink Water Purifier

To give you a summary here is the difference between wall mounted water purifier and under sink/counter water purifier.

Wall Mounted vs Under Sink Water Purifier

FeaturesWall Mounted RO Water PurifierUnder Sink RO Water Purifier
Installation placeOn kitchen wall or tabletopUnder or beneath the sink
Ideal UsageWhen kitchen has a lot of spaceWhen space in kitchen is less
Purified water delivery speedMedium (water drops down due to gravity)High
Purifying SpeedMediumMedium

In short, if you plan on saving space in your kitchen, then UTC water purifiers are the best because the space below the sink can be well utilized with this water purifier.

Now let’s look at some of the top under sink water purifiers in India.

Best Under Sink Water Purifiers in India

KENT Excell+ Under the Counter RO + UV/UF Water Purifier

  • Water tank capacity of 7 litres
  • Multistage purification of RO + UV + UF along with a TDS Controller
  • Purification speed of 15 litres per hour
  • Filter change alarm and UV fail alarm
  • WQA, USA gold seal certified
  • Spin-welded RO membrane housing to prevent tampering
  • Push fit components that is leak proof
  • Built with high grade ABS plastic
  • 1 Year Warranty + 3 Years No Service Charge
kent excell plus

Kent Excel+ is one of the best under sink water purifiers in India. It comes with multistage purification of RO + UV + UF. This means that it can effectively filter water with TDS of 500 to 2500 PPM efficiently. Make sure to get the output TDS levels checked and regulated by

RO purifies water from different toxins, while UV disinfects water from microorganisms by passing UV-C radiations through the water.

This water purifier also comes with the important TDS controller to add back minerals to the purified water. This makes the water healthy to drink. The water tank is built with ABS food grade plastic, which means that the water purifier last long and it will not leak any chemicals into the water in the long run, like ordinary plastics.

Many RO water purifiers from other brands have lower purification speed, however Kent RO water purifiers have high purification speeds. This water purifier also has a decent purification speed of 15 litres per hour, which is quite good considering it is an RO water purifier.

Included Components

  • Water purifier
  • Installation kit (includes tap)
  • User manual

Installation of the water purifier is provided free of charge by the manufacturer. For requesting an installation/demo for this water purifier you will have to simply call the Kent’s customer support and provide the model name.


  • High purification speed
  • Adds back minerals to water without the need to adjust water TDS
  • Alert system to indicate end of life of filters
  • Suitable for water from all sources such as tap water, municipal water, borewell water
  • Built with ABS food grade plastic


  • Wastes water like many other RO water purifiers, but does not have technology to reduce the wastage
  • Slightly higher price

A.O. Smith Z2+ RO+MIN-TECH Under the Counter and Under Sink Water Purifier

  • 6 Stage purification
  • Water tank capacity of 5 litres
  • Advance alert system for RO membrane change and filter change
  • Mineralizer technology- MIN-TECH
  • Sleek gooseneck faucet
  • Digital display gives elegant look
  • Built with virgin food grade plastic- ABS
  • 2 Year Warranty on RO membrane
AO smith Z2 under sink water purifier

AO Smith is a US brand of water geysers and water purifiers. It is one of the largest such brand in the US. The AO Smith Z2 water purifier comes with RO purification and technology to add back minerals into water.

The 6 stage purification process includes following: Pre-filter + Sediment filter + Pre Carbon filter + RO Membrane + SCM-TECH (Silver Activated Post Carbon) + MIN-TECH.

If you are wondering why there is no UV or UF in this water purifier, then don’t worry, the SCMT in AO Smith water purifiers is a decent replacement of UV + UF technology. It is a patented technology developed by the brand.

Its another patented SSM Technology (Side Stream RO Membrane) is idea for water with low and high TDS of upto 2000 PPM. It also wastes less water.

The MIN-TECH is a mineralizer that adds essential minerals calcium and magnesium back to the water. This ensures that the water is healthy, tastes good and has acceptable pH level.

Please note that this technology is different from TDS controller tech used in Kent water purifiers. While TDS controller adds back small amount of impure water to retain mineral, MIN-TECH does not add back any water. It adds minerals with the help of a mineral cartridge that has to be recharged after its life is over.

The RO membrane in A. O. Smith RO water purifier is tested and certified by WQA against NSF/ANSI 58 standards for material requirements.


  • The patented sidestream RO membrane allows sideways flow of water, which reduces water wastage
  • RO membrane is tested and certified
  • It comes with stylish gooseneck faucet
  • The digital display is pleasing to look at and comes with work indicator, tank full indicator, advance alert, source indicator and filter status indicator
  • 2 year RO membrane warranty is quite good
  • Decent 5 litres capacity


  • This water purifier is quite expensive
  • Service in some areas is not great

Kent Sterling Plus RO+UV+UF+TDS Under The Sink RO Water Purifier

  • Inbuilt water tank
  • Tank capacity of 6 litres
  • RO + UV + UF purification
  • TDS controller to retain essential minerals
  • Auto on/off operation
  • Purification speed of 15 litres per hour
  • Made up of ABS food grade plastic
  • 1 Year Warranty + 3 Years Service AMC* FREE
Kent sterling plus

Best thing about this water purifier is that the tank is inbuilt which makes quite compact. On top of this, there is no need to drill holes in the wall to install the purification system like in most other under the counter water purifiers.

It can purify water from almost all sources. This is because it has RO + UV + UF purification, which means that quality of output water is excellent even when the source water has a high TDS of upto 2000 PPM.

Its tank capacity is decent at 6 litres, which can take care the needs of medium and large families easily. Also, its flow rate of 15 litres per hour is also among the best as far as under the counter water purifiers are concerned.

The TDS controller takes care of adding back minerals into the water by adding small amount of impure water back to the RO purified water. This improves the taste of water and makes it healthy to drink.

The body is built with ABS food grade plastic that lasts long and is safe for drinking. Warranty of 1 + 3 years is also decent.

Franky, most of the features of Kent Sterling Plus are similar to Kent Excel Plus apart from inbuilt water tank feature. Plus, Kent Sterling Plus does not have filter change alarm / indicator like in Kent Excel Plus.

Installation of the water purifier is free and Kent will contact for the installation within 36 hours from delivery. Charges for pre-filter, extra pipe, pump, PRV & other accessories are additional.


  • High purification speed
  • Adds back minerals to water
  • Compact water purifier with inbuilt water tank is easy to handle and install
  • Suitable for water from all sources such as tap water, municipal water, borewell water
  • Built with ABS food grade plastic


  • No filter change indicator

Eureka Forbes Aquaguard UTC RO+UV+MTDS 8-litres Water Purifier

  • Multistage purification with RO+UV
  • Water tank with 8 liters capacity
  • MTDS for adding back essential minerals
  • LED Indicator system
  • Suited for all water sources
  • Maximum TDS limit of 2000 ppm
  • 1 year warranty
Aquaguard UTC water purifier

Its 8 litre tank capacity, it is among the highest when compared to other UTC water purifiers in the market. The purification of RO + UV remove toxins and harmful microorganisms from water effectively.

However, there is no UF purification present in this water purifier. Highlight of this water purifier is that there is no need to drill holes to attach the it to the wall as it can be installed by placing it on the floor itself.

Also, it consumes lower power than many other UTC water purifier as it is rated only 40 Watt, which is decent.

As far as purification is concerned, it ideal for water from different sources such as borewell water, municipality water, brackish water etc.

It also comes with easy to read LED indicators for ease of use.

If you are looking for a under the sink water purifier from Eureka Forbes/Aquaguard then this is the best one for you.

Included Components

  • Water purifier
  • Power supply
  • Power cord
  • Pre-filter
  • Installation Kit


  • High tank capacity
  • No need to drill holes in wall to attach the purification system
  • LED indicators
  • MTDS


  • No UF membrane present
  • High price
  • Slightly lower customer satisfaction

A.O. Smith X5+ Under The Counter RO+MIN-TECH Water Purifier

  • 6 Stage purification
  • Water tank capacity of 7.5 litres
  • Advance alert system for RO membrane change and filter change
  • Mineralizer technology for adding minerals
  • Gooseneck faucet
  • Made of virgin food grade plastic- ABS
  • 2 Year Warranty on RO membrane
AO Smith X5

The AO Smith X5 UTC water purifier is one of the best under the counter water purifiers when it comes to affordability. It is one of the few UTC water purifiers from reputed brand that come under sub-15,000 rupees range.

Its features are similar to Z-Series water purifiers from AO Smith with a few differences. Firstly, it tank capacity is significantly higher at 7.5 litres as compared to 5 litre capacity of AO Smith Z2 water purifier.

Another difference is that it does not have any indicator / alert system like in Z2.

Main difference between the two is the design. While this water purifier comes with separate water tank & purification system, Z2 comes with inbuilt water tank, which makes Z2 more compact.

Since this water purifier has separate purification system, it has to be installed into the wall by drilling holes in it.

This water purifier comes with 6-stage purification system that includes RO as well as mineralizer technology MIN-TECH. This makes it perfect for water from any water source because RO purifies water, while MNI-TECH adds back essential minerals, which makes water fit for drinking.

The RO membrane comes with patented technology to reduce water wastage from RO purification. On top of this, the membrane is certified by WQA against NSF/ANSI 58 standards for material requirements.


  • Attractive pricing
  • Mineraliser technology means there is no need to adjust water TDS
  • Water wastage reduction technology
  • Excellent 6 stage purification
  • WQA certified RO membrane
  • 2 year warranty on RO membrane


  • No indicator system

Havells RO+UV UTC Water Purifier

  • RO + UV with 8 stage purification
  • Smart alert indicators
  • Can also be mounted on the wall
  • Storage capacity of 10 liters
  • Modern design
  • 1 year warranty on the product
Havells UTC

This water purifier comes with 8 stages of purification includes: Membrane performance enhancer, Sediment cartridge, Activated carbon cartridge, RO membrane, Mineralz cartridge, Silver impregnated taste enhancer, Revitalizer, Germicidal UV.

Its membrane performance enhancer increases the life of the RO membrane by preventing scaling. It also improves the purification capacity of the purifier.

The mineral cartridge (mineralizer) adds back essential minerals into the water such as calcium and magnesium.

Its i-protect monitoring system stops constantly monitors the water purification process.

It comes with a variety of alert indicators to help you monitor it. The indicators include following alerts: Self-diagnostic, Purification, Tank Full, UV, SV, Low input water pressure, pump failure.

The purification capacity of 10 litres is quite high when compared to most other RO water purifiers. However, any RO water purifier with more than 6 litre tank capacity is sufficient for medium and large families.


  • Multiple indicators for monitoring water purifier
  • High 10-litre tank capacity
  • Compact and modern design
  • No need to adjust water TDS because of mineralizer
  • No need to drill holes for attaching purification unit as it can be placed on the floor


  • Higher price tag

Buying Guide: Under Sink Water Purifier

Before buying the best under sink water purifier, there are certain factors that should be considered so that you can make an informed decision. Here are the factors:

1. Purification Technology:

Most under sink water purifiers come with RO technology. Finding an under the counter UF water purifier is difficult.

However, you need to make sure that you get an RO water purifier with a TDS controller as it controls the level of TDS and ensures that the water is healthy to drink. Another technology that should be present in an RO UTC is UV purification. UV effectively kills microorganisms.

2. Mineralizer:

If TDS controller is not present in water purifier, then a mineralizer must be present. A mineralizer adds essential minerals into water just like a TDS controller. However, a mineralizer is a cartridge that has to be replaced after every 1 to 1.5 years when it gets empty.

Also, a mineralizer is costlier than a TDS controller. A TDS controller comes in a couple of hundred rupees, while a mineralizer comes at around 2,000 rupees. Hence, you can go with a mineral booster-based water purifier if there is no TDS controller in it.

3. Storage Capacity:

A water purifier with a minimum storage capacity of 5 litres is considered ideal. Only use of a water purifier is when there is power cut. Larger water tank ensures that you have pure drinking water even when there is no electricity in your home.

7 litre capacity is usually considered decent for most Indian households.

4. Size:

Under-sink water purifiers are installed under the sink or below the kitchen counter. Hence, you should buy a purifier with a compact design so that it can be installed easily without taking too much space.

5. Life of Filtration Units & Cartridges:

Every cartridge and filtration unit comes with a lifespan. While some cartridges have to be changed every 6 months, some can be used for up to 3 or even as high as 5 years.

RO ensures that the water purifier comes with multiple stages of purification. Hence, you will have to change the filtration units in 6 to 12 months while the RO membrane can work effectively for up to 1 to 2 years.

6. Flow Speed:

One thing that is different between wall mounted/table top water purifiers with under the counter water purifiers is the speed of dispensed water.

Since water pressure is high, you can fill a bottle of water in less than 10 seconds, which is quite good speed.

7. Maintenance:

As discussed, maintenance cost of an under sink water purifier is not low. This is because RO purification has a high number of filters inside the water purifier.

The water purifier should be easy to maintain. It should not only be easy to clean but also easy to change filters and cartridges when needed.

8. Installation:

Installation of under sink water purifier requires additional arrangements including a power socket and a tap with a constant water supply beneath the sink. These arrangements need to be done before installing the water purifier.

Hence, you should make sure that the installation is done properly by the technician associated with the brand.

9. Ease of Installation:

Most under sink water purifiers come with a faucet/tap. However, some water purifiers do not offer an additional faucet. If the water purifier brand does not offer a tap, you will have to buy it separately.

10. Faucet Type:

Make sure that the water purifier comes with a swivel-shaped or gooseneck faucet.

A swivel shaped faucet allows free flow of drinking water and reduces splashing because the faucet is mounted on top of existing kitchen sink. You can place the water bottle on the sink, under the faucet and fill the water without any mess in the kitchen.

11. Mode of Operation:

The mode of operation of an under-counter water purifier should be automatic. Make sure the water purifier comes with an auto shut off feature. It will ensure that the water purifier shuts off automatically when it is not in use for more than ten minutes. The water purifier should also be able to fill the tank automatically whenever you use some water. It will ensure that the tank is always full.

12. Self-Cleaning System:

A self-cleaning system is an additional feature that you get in some under sink water purifiers. This feature cleans the system automatically without any manual intervention.

It is helpful in preventing the deposition of dissolved solids such as calcium and magnesium over the membrane. Hence, it ensures the longevity of the water purifier and intends to provide a continuous flow of pure drinking water.

13. Alert Indicators:

Some of the common alert indicators are filter-change indicator and UV fail indicator. You can opt for under sink water purifier that offers these indicator/alarm system as it will notify you whenever it is time to change the filters to ensure you get safe drinking water all the time.

14. Price:

Under sink water purifiers come at higher price than regular water purifiers. Price of these water purifiers start from 15,000 rupees and can go to upto 25,000 rupees.

15. Warranty:

Make sure that you get a warranty of 1 year with the water purifier. Some brands offer warranty only on electrical parts of the water purifier. You should check what all comes under the warranty before buying an under-sink water purifier as well as after-sales service.

Advantages Of Under Sink Water Purifier

While, wall mounted water purifiers were designed for traditional Indian kitchens without any kitchen cabinets, under the sink water purifier is specially designed for modern modular kitchens.

Biggest advantage of under sink water purifier is that it saves valuable kitchen counter space. Since space below the sink is usually empty, a water purifier is perfect to utilize this space. It is also good for the aesthetics of your kitchen.

The water purifier faucet (tap) is usually installed close to the sink which can be quite convenient to use. Hence, you can use the water to wash fruits and vegetable as well.

Under the sink water purifiers come with high flow rate. Which means that a water bottle can be filled in less than 10 seconds.

Since the water faucet is near the sink there is no need to worry about spilling water on the kitchen floor.

Disadvantages of Under Sink Water Purifier

You will have to install an additional faucet. If the faucet is not provided, then you will have to purchase it additionally. In case you do not want that, you can also install a 3 way kitchen faucet for RO system.

Installation required drilling of holes for faucet and for system installation. Charges for these might be extra.

Power socket should be present below the sink. Otherwise you will have to make arrangement for proper and safe power connection.

Kitchen Modifications for Fitting Under Sink Water Purifier

The biggest visible modification you will have to make while installing under sink water purifier is the holes that will have to be drilled. One hole will have to be drilled in the slab near the sink for the faucet (tap) of purified water. And two holes will have to be drilled in the wall below the sink for mounting the water purifier.

Another important point to keep in mind is that there should be a power socket under the sink to power the water purifier.

It is important to have a water outlet under the sink because the water purifier will need constant source of water. If it is not present, the you will need to take plumber’s help.

A proper drainage system is required because RO purifiers reject waste water.

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