Kent Grand Plus Review [2021]: Everything You Need to Know

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Kent Grand Plus RO + UV + UF Water Purifier with TDS Controller

  • High Storage & flow rate
  • 50% water recovery
  • TDS Controller
  • In-Tank UV Disinfection
  • Filter Change Alert
  • Filters water from all sources
  • 1 Years Warranty + 3 Years of Extended Free Service

Kent Grand Plus is a very popular water purifier that comes with a 9 litre tank to store water.

It features all three key purification technologies – RO, UV and UF and it can purify almost all types of water, be it soft water such as municipal water or hard water such as that from the borewell.

This water purifier comes with 5 filters that can filter contaminants from water such as large impurities – sand, mud and dirt and very small impurities – heavy metals like arsenic, lead and mercury. And Its UV purification removes all biological impurities – bacteria, viruses etc. Additionally, it also features a TDS controller to control total dissolved solids in output water.

Model NameKent Grand Plus
Purification TechnologyRO + UV + UF
TypeWall Mountable
Purification Stages7
Storage Capacity9 litre
Filtration Capacity20 L / hour
Dimensions40 x 23 x 54 cm
Weight8.4 Kg
Material TypeABS Food Grade Plastic
Operating Voltage100 – 300 V, 50 Hz
Power Consumption60 Watt
Warranty1 Year Warranty + 3 Years No Service Charge

Kent Grand Plus Review 2021

In this Kent Grand Plus Review, we will explain purification technologies used in this water purifier as well as all the key features.

Purification Process of Kent Grand Plus

Kent Grand Plus comes with all the three main water purification technologies – RO, UV and UF along with a TDS controller.

Purification involves 7 steps which includes five steps of filtration, one step of UV disinfection and one step involves TDS regulation.

Now let’s take a look at each step of purification in detail.

RO purification with TDS Controller

Stage 1 – Sediment Filter

Sediment filter is responsible for filtering visible impurities which settle at the bottom of the filter in form of sediment. Hence, the name – Sediment filter.

Sediment filter filters out larger impurities such as sand, dust, dirt and so on. This is necessary because such impurities prevent efficient working of more advanced filters in further steps.

Stage 2 – Activated Carbon Filter

In the second stage of purification, water is passed through activated carbon filter. Activated carbon absorbs chlorine, chlorine by-products and organic impurities from water.

Municipal water is usually treated with chlorine because of its disinfection properties. But sometimes, chlorine and its by-products can be in excess, which is not good. This is where activated carbon helps.

Also, activated carbon is good at absorbing organic impurities. Usually, these impurities are responsible for bad smell and taste. Thus, taste and smell of water is neutralized here.

Stage 3 – Ultrafiltration (UF)

In the third stage of purification, water is allowed to pass through a UF membrane. This is semi-permeable membrane with pore size of 0.01 microns ( 1 micron = 0.0001 cm). Size of a bacterium (pl. bacteria) is usually more than 0.5 microns, thus it can even filter out bacteria from water. So, UF membrane filters bacteria, some viruses and suspended solids.

Stage 4 – Reverse Osmosis (RO)

This water purification process involves RO membrane, which has minute pores of 0.0001 microns (0.1 nanometers).

Since, RO membrane’s pores are so small, water is passed with a good amount of force so that water molecules only water passes through it. This process traps all the dissolved salts, minerals and other very small impurities from the water such as harmful heavy metals like arsenic, mercury, pesticides etc. Since it filters even dissolved salts, it is ideal to purify hard water such as borewell water.

Stage 5 – TDS Controller

Fifth stage of filtration employs a TDS controller that regulates the amount of dissolved solids in the water. This is a necessary step in RO water purifiers because RO can filter essential elements. TDS controller mixes small amount of slightly impure water with RO purified water, thus adding back natural minerals and salts back into the water. This output water is healthier, safer and enriched with essential minerals.

Stage 6 – Ultraviolet Filtration (UV)

Once all the impurities are removed from water, it is passed through the UV chamber for UV purification. The UV chamber of Kent Grand Plus is made up of anodized aluminium that houses the UV lamp. UV filtration makes use of this 11 Watt UV lamp that produces UV-C radiation to deactivate harmful germs such as bacteria, viruses, protozoa etc.

Stage 7 – Post Carbon Filtration

The seventh stage of water purification involves post carbon filter which works as a polisher and it removes any remaining foul tase and smell from water.

Kent Grand Plus uses no chemicals for purification of water. This ensures 100% chemical-free water.

Physical Features

Kent brand is known more for purification rather than looks. Kent Grand Plus’ design is similar to many other Kent water purifiers with all the filters covered by a transparent cover on the top, while storage tank is at the bottom. Finally, a water dispensing tap is attached at the bottom of this tank.

This is a 9 litre water tank with water level indicators for ease of use. It is built from ABS food grade plastic, which is durable and does not leak chemicals unlike some poor quality plastics. Also, It is a wall mountable water purifier.

‘Zero Water Wastage’

RO water purifiers are known for wasting 65 – 75% water. This is a lot of water. To remove this limitation of RO purifiers, Kent Grand Plus has come up with Zero Water Wastage technology.

The rejected water is pumped back into the overhead water tank with the help of an internal pump. This rejected water mixes with water in the overhead tank and gets diluted, which you can use as normal tap water.

Please note that in theory, it is 0% water wastage but actual water wastage is around 50%.

In-Tank UV Disinfection

Kent Grand+ comes with in-tank UV disinfection feature. This prevents growth of microbes when the water is being stored inside the water tank. This is important because microorganisms can multiply when the water is being stored. In-tank UV disinfection safeguards from this microbial growth.

Water Tank

Kent Grand Plus is comes with a large 9 litre water tank which is made from good quality food grade plastic. 9 litres capacity is sufficient for most of the Indian households.

Purification Capacity

Purification capacity of this water purifier is 20 litres per hour. It means it will purify 1 litre every 3 minutes. This is high speed as compared to many other brands of RO.


This water purifier comes with filter change alarm. This alarm notifies the user when it is time for replacement of RO membrane. Other than this, it has a water level indicator that is a calibration on the surface of water tank. When the water level is full, it means the water purifier can be switched off.

Auto Flushing System

Auto flush system in this RO purifier prevents scaling or damaging of the RO membrane by rapidly rinsing it. This technique washes away impurities and keeps the RO membrane clean. This, this process increases the life of RO membrane by preventing it from damaging effects of physical impurities such as dust and dirt.

Powerful UV bulb

Kent Grand Plus comes with a powerful UV lamp of 11 Watt. This is 37% higher wattage as compared to regular 8 Watt bulb UV lamp used in many water purifiers.

Push fit components

This water purifier comes with push fit components. It means that all the components inside the water purifier are assembles in a way that prevents any type of water leakage.

Built in SMPS

This water purifier comes with a built-in SMPS that prevents it from any damage from voltage fluctuations.

Maintenance cost

Kent Grand Plus comes with 5 filter and 1 UV bulb- Sediment filter, activated carbon filter, UF membrane, RO membrane, post carbon filter and one UV bulb. You will have to change this filters and UV bulb periodically.

Basic filters such as UF, activated carbon filter, post carbon filter and sediment filter will have to be change annually. These four filters will come in the range of 1000 – 1500 rupees.

RO membrane is the costliest among all the filters, but its life is between 1 and 3 years. Life of RO membrane depends on level of impurities in water and usage. You will be notified by the in-built alarm inside the purifier when the life of RO membrane ends.

The cost of the RO membrane is between 2,000 and 2,500 rupees.


Kent Grand Plus has a warranty period of 1 year from the date of installation. This includes free repair and replacement of some filters. On top of it, there is free service for 3 years, which means that no extra charges will be taken for the visit. Please note that this information may change in future and it is important to read the terms and conditions thoroughly before buying.


  • RO + UV + UF filtration
  • Large water tank with high purification capacity
  • In-tank UV Purification
  • TDS controller
  • More than 50% water recovery
  • Built-in SMPS
  • Can purify water from almost all sources
  • 1 years of warranty plus 3 years of extended free service
  • Auto flush RO system


  • High purchase and maintenance cost
  • Sediment filter (pre-filter) not included in the price


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Frequently Asked Questions (FAQs) | Kent Grand Plus Review

What is the maintenance cost of Kent Grand Plus?

RO membrane can be changed in 1 to 3 years depending upon the usage and water quality. In some cases it can last even more than 3 years. It will cost between 2,000 and 2,500 rupees. Rest of the filters including UV lamp should be changed annually. They will collectively cost between 1000 and 1,500 rupees.

How long will Kent Grand Plus last?

A regularly maintained RO water purifier can last more than a decade easily. Even Kent Grand Plus should last 10 – 15 years if maintained properly.

When do I have to replace filters in Kent Grand Plus?

RO should be changed when the water purifier alerts you with an alarm. Rest of the filters and UV lamp should be changes annually.

How often should I flush RO membrane in Kent Grand Plus?

You do not have to flush RO membrane in this water purifier because it comes with Auto-flush feature.

Can I connect Municipal water supply pipe directly to Kent Grand Plus?

Yes you can connect but make sure that water pressure is decent, else you should connect a booster or divert it to an overhead tank.

Can I connect borewell water directly to this water purifier?

Yes you can connect.

How to control the TDS of water in Kent Grand Plus?

TDS control screw is used to regulate TDS levels. You will have to open the cover of the filter to reach out to this screw.
Turn it clockwise to increase the TDS and anti-clockwise to decrease the TDS. If you are not comfortable opening the cover, then you can get this done with the help of service technician during the time of installation also.

How can I reuse waste water from Kent Grand Plus?

This water purifier comes with at least 4 feet long pipe for wastewater. You can you this water for washing vegetables or utensils, mopping floors, watering your garden, and cleaning your vehicle.


If you are looking for water purifier with all the important features then you should consider Kent Grand Plus.

With RO+UF+UV technologies, this water purifier can purify almost water from almost any source, while powerful UV bulb disinfects water effectively. Also, In-tank UV disinfection keeps purified water safe from microbial build-up. And its in-built TDS controller helps in regulating the TDS of the water.

9 litre water storage tank ensures safe drinking water even during power cuts. ‘Zero Water Wastage’ prevents wastage of water to some extent, which is good for the environment. Auto-flushing systems increases the life and effectiveness of RO membrane. Overall build quality of Kent Grand Plus is decent. 

We hope you found this Kent Grand Plus review helpful. If you have any doubts, you can comment below.

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2 thoughts on “Kent Grand Plus Review [2021]: Everything You Need to Know”

  1. Thank you for detailed review of Kent Grand Plus. I am interested in buying Kent water purifier. Can you suggest any other models of Kent Water Purifiers?


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