The 3 Under Sink Water Purifiers In India Reviews and Buying Guide In India

If you come to your home, after a long day, the first thing you ask is for ‘Water’. The water is a beautiful creation of nature that makes you feel energetic, fresh, and satisfied after a sip. You must be aware of the increasing water pollution in our environment.

From where this waste comes from?

These wastes come from the exhaustion of human resources, which mixes with water and makes it polluted. The same water is sent by the municipalities after chlorination process to societies and localities. If you directly consume the water, there are high chances for you to get infected due to the water contamination. Water-borne diseases like Dysentery, Cholera, and Diarrhoea are very common nowadays.

Therefore, you can also find the presence of heavy metals like arsenic, lead, and mercury with additional TDS.

How to Resolve this problem?

Simple, get a water purifier at your home.

Don’t you have the space to keep the water purifier?

We have a solution for that, you can install ‘Under the sink’ or the ‘Under the counter’ type of water filter that saves space in your kitchen.

As we are moving to urban areas and start living in a rent house with big families. There is less space available.

In this article, we will help you to look for the mandatory features that you must consider when you are buying the Under-Sink Water Purifier. All the information will be written in our ‘Buying Guide’ below.

Before that let us have a look at the most common and popular Under Water Purifier in the market. Also, you will know each on of them in detail below the table for better understanding.

3 Under Sink Water Purifiers In India

Under Sink Water PurifierFilter TypeWarrantyBuy Now
Kent Excell Water PurifierRO + UV/UF + TDS CONTROLLER1 yearCHECK ON AMAZON
A.O Smith  Z2 + Water PurifierRO + MIN-TECH1 yearCHECK ON AMAZON
Sterling Plus Water PurifierRO + UV + UF + TDS1 yearCHECK ON AMAZON

3 Under Sink Water Purifiers In India Reviews

1. Kent Excell Water Purifier


Kent is the most successful Indian brand that is providing the best service to its customers worldwide. It offers an exciting range of healthcare products and home appliances includes Water Purifiers, Air Purifiers, Vacuum Cleaner, and Modern Kitchen Appliances.

The Kent Excell water purifier has a capacity of 7 liters with the innovative purifying technology under RO + UV/UF + TDS Controller. The water purifying speed is 15 liters per hour. The storage capacity is certified food-grade plastic.

The TDS controller checks the Total Dissolved Salts in the water. The water purifier installs on the TDS level in between 500 to 2500. A piece of advice from our side is to check the TDS of your water source.

The water purifying technology is RO + UV + UF + TDS mineralizer water purification. The double purification of RO + UV removes the dissolved impurities. The TDS control system retains the essential minerals that make the water tasty to drink.

The filter change alarm and UV Fail alarm with Computer controlled operation that will keep you alert about the filter change. Also, you can pre-set time the alarm, and it is audible.

The spin-welded RO membrane housing prevents tampering. The purifier is fully automatic with auto-start and auto-off.

Even if the power cuts, you can take out the water from the storage tank.

Verdict: If the filter does not change within the next 60 hours after the alarm, the water purifier stops working. For every liter of water purifier, 650 ml of water filters out of the machine. It encourages to save the water in a utensil and use it for cleaning utensils, washing clothes and watering plants.

The water purifier box contains an installation kit and user manual. You have to call on the customer care, the mechanic will come to your house and install the purifier.


  • Double Purification
  • TDS mineralizer
  • Good storage capacity
  • Easy to install
  • Water available even in the absence of electricity
  • Free installation with one-year free service
  • One-year warranty


  • High-maintenance cost

Buy Now at Amazon

2. A.O Smith  Z2 + Water Purifier

ao smith

The A.O Smith Z2+ Under the Counter RO + MIN-TECH Water Purifier. It has 5 liters of storage capacity that is small in size for small families or office. The material of the tank is grade ABS, that protects the water for a longer time.

The company offers you free installation, in this case, you do not have to worry about how will you install it. It easily fits under the counter.

Before buying a water purifier, kindly check the TDS level of that area, depending on that you can buy the water purifier. When the water quality is good, it has a low TDS level. In Z2+ the TDS level up to 2000ppm and hardness up to 400 ppm is applicable.

The water purifier has six-stage of purifications:

Stage 1: Pre-Filter

Stage 2: Sediment Filter

Stage 3: Pre-Carbon Filter

Stage 4: RO Membrane

Stage 5: SCM- Tech (Silver Activated Post Carbon)

Stage 6: MIN-TECH: The mineralizer technology adds essential minerals like calcium and magnesium back into the water. While processing, the water losses its minerals, and MIN-TECH fulfills the deficiency.

The Patented SSM technology is unique as the side stream RO membrane is suitable for both low and TDS levels of water. It helps to improve the recovery and minimizes the wastage of water in purification.

The water comes out from a gooseneck faucet that is convenient in use. The digital display makes it easy to understand the digits and gives an intelligent display for information. After all, you do not have to keep a reminder for the filter change because the advance alert lets you know the RO membrane or other filters need replacement.

The product certified by WQA against NSF/ANSI 58 standards for material requirements.


  • Easy to use
  • Easy to install
  • Good storage capacity
  • Enhances the flavor
  • Six stages purification
  • Value for money
  • One-year warranty


  • Expensive in its price range

Buy Now at Amazon

3. Kent Sterling Plus Water Purifier


The Kent Sterling Plus has RO, UV, UF, and TDS controller. It is under the sink water purifier.

The water purifier has an elegant smart design that is ideal for the under-the-counter installation. Also, it is suitable for the side-by-side placement adjacent to the refrigerator for effective space utilization.

The mineral RO technology retains the essential natural minerals that filter out from the purified water. The TDS controller helps in making the drinking water tasty to drink.

Double Purification by the sterling plus that is fully automatic, which allows the purifier to begin the purification process whenever the water purified level falls from the maximum level.

It has a 6-liter inbuilt hydrostatic storage tank that provides a continuous supply of purified water even if in the power cut.


  • Easy to install
  • Double water purification
  • Added minerals
  • Enhances the taste
  • Space saver
  • Value for money
  • One-year warranty


  • Missing power and water level indicator

Buy Now at Amazon

Buying  Guide For Under Sink Water Purifier

You will find this article very helpful as you will go on reading the important factors to look when you are buying the Under-Sink Water Purifier.

Firstly, let us understand the facts by going through the features to look upon


  • Easy to Install: Installation is not your headache, as the water purifier companies provide you this in no charge. As most of the water purifiers are easy to install but the under-sink ones are special. You require more space under the sink and if it is there then you are done with the installation part.
  • Easy to maintain: Most of the purifiers in the market requires filter change, other than this there is no such requirement. The water purifier replacement depends on the water TDS and impurities in your area. The filter comes at a nominal cost, and once in a year, you must change it.
  • In your Budget: If you notice, the good quality under-sink water purifiers are efficient and in the budget.
  • Space Savior: The modern kitchen décor makes the area of the kitchen small in size. You can buy an under-sink water purifier and will occupy minimal space.
  • Upgraded Models: The companies like Kent and AO Smith offers the best water purifier in the market, with high quality in your budget.
  • TDS controller: Advisable to buy a water purifier which purifies high TDS water because then you can use it any of your places or if you have a transfer job. You can shift to the other place, without worry about the high TDS if there.

 Types  Of Under-Sink Water Purifier

There are two types of under-sink water purifier in the market, one is the inline filters, and the other one is the regular filters. Let us understand them in detail

  • Inline Filetrs : The inline filters are installed in-line in your normal water source with push fittings. The inline filters are difficult to install. But they allow to keep on using the kitchen tap as the water filters flow through it as well. These inline has a single cartridge.
  • Regular Filters: This type of filter requires T-connector and separate filter tap. You have to install another tap to get the filtered water only. You have to install multi-stage filters in this type.

Drawbacks Of Under-Sink Water Purifier

  • You have to install a separate to get the purified water. You can also have a three-way kitchen sink that gives hot, cold, and the filtered water from a single outlet.
  • They are a single point of use, as they only purify the water at that particular water outlet alone.

Frequently Asked Questions

1.How does the Reverse Osmosis work in an under-sink water purifier?

The RO is common for any type of water filter. The Reverse Osmosis comes with a semi-permeable membrane that allows only pure water to pass. The membrane eliminates the contaminants that are too large to pass through the small pores. Thus, the purification process removes larger and harmful particles.

2.What to check when buying the under-sink water purifier?

The filtration efficiency as to how long you can use the water purifier in your area. You must also check the tap compatibility before installation.

3.Hardness and TDS of water are the same?

The hardness of water represents the amount of calcium and magnesium salts in water. The hard water lefts impurities in the tank down the below. The TDS is the mixture of total dissolved and undissolved salts of both organic and inorganic.


The under-sink water purifier is a new concept in the market. It has become more popular in small houses or nuclear families. The greatest advantage of the under-sink water purifier is that it saves a lot of space and does not require much maintenance like the regular water purifiers.

These types of filters are hygienic because they are under the sink, away from any oil and dust.

As per our recommendation, we would choose “Kent Excell water purifier”, because it has RO + UV/UF + TDS type of water filter and high-water storage capacity in less space. 

You can also go to the other two products as they are great at their place.

We hope this article helped you in choosing the best under sink water purifier that satisfies your requirements.