Water Purifier Buying Guide


A water purifier, also known as a water filter, has become a basic necessity in every household today. There’s a definite rise in the awareness of the hazards associated with drinking impure water among people today, which is why the demand for effective water purifiers is on the rise. As we all know, water is a good solvent and dissolves with elements that comes in contact with it. These could also be chemicals and toxic substances which can affect our health in adverse ways. It has become a matter of concern with the deadly diseases floating in water. This is why more and more people on this earth are turning to water purifiers to rescue themselves out of this scary situation. But the big question remains: Which water purifier to buy? There’s no “one size fits all” water purification type. Keep reading further to find out which one suits your needs in the best manner.

The 6 water purifiers we recommend

If you already aware with the types, their pros and cons and simply want to know about the ones we recommend, here’s a list for you to make your decision-making process easy:

Name of model Purification Type Purifying capacity Electric or Non-electric Best for Price after cashback, on CashKaro
Kent 15 Lph Grand Ro+uv+uf+tds Controller Water Purifier 5 stage purification process 5-15 ltr Electric Water which contains a high amount of dissolved impurities i.e. Hard water and needs multiple purification steps to eliminate those impurities. Rs.14,210(M.R.P: Rs.17,000)Buy here
Kent Ultra UV Water purifier 3 stage purificationprocess 60 litres/hour Electric water with microbial impurities which is not too hard and you can get away without using RO technology since it loses all essential minerals in water good for health. Rs.4763(M.R.P.: Rs.8500)Buy here
Pureit Classic 23litres Water Purifier  Multi stage purification 23 litres Non-electric If you live in an area where there are frequent power cuts and you don’t want to go through the hassle of refilling it every now and then. Rs. 2318(M.R.P.: Rs.2700)Buy here
Eureka Forbes
Aquasure On
Tap water
Carbon Black 750 litres Non- electric If you are on a tight budget and need a travel friendly option to get purified water Rs.872(M.R.P. : Rs.935)Buy here
HUL Pureit Ultima RO+ UV Water Purifier 6 stage purification process 10 litres Electric If the water you receive has dissolved impurities and you are looking for the best water purification system Rs.16,480(M.R.P: Rs.17645)Buy here
Tata swach 15ltr
Smart Saphire
Gravity Water
Silver Nano purification technology(Tata swach bulb) 15 litres Non-electric If you are looking for a good and affordable water purifier and want virus and bacteria elimination from contaminated water effectively. Rs.1172(M.R.P: 1349)Buy here


The smart price comparison feature and awesome cashback deals present on CashKaro.com will help you save more while shopping online.

Now, moving on;

Types of water purifiers

There are a variety of water purifiers available today to meet different requirements and every budget. Their cost can range from Rs.1,000 to over Rs.50,000 and even more based on the one you choose. You will have to do your homework here and find out about the different types available in the market today and which one solves your purpose. Most of the water purifiers today work on the following techniques and some even use a combination of two to deliver better results:

Candle filters

1candle flter--..

In candle filter, contaminated water is purified by passing it through a candle that sits on top of a plastic.

Candle filters have two reservoirs that sit on top of each other. The top reservoir consists of either one or two ceramic candles upon which contaminated water is poured. The water is passed through that candle which has tiny pores. Any impurity which is bigger than the pores gets blocked out. The clean water is stored in the low reservoir safely. It doesn’t involve the use of electricity. However, you should know that the purified water is not completely devoid of impurities. It still may contain minute impurities like viruses. Also, the filter candle is made up of resin material which needs to be changed on a monthly basis. Some candle filters even incorporate the use of activate carbon to deliver better results.


-         Low cost.

-         Ideal if you live in an area which requires the lowest amount of filteration

-         No high maintenance

-         Requires simple operation

-         Stores clean water safely

-         Needs no electricity


-         Requires frequent cleaning of candles

-         Not the most effective purification process

-         Takes a long time to remove impurities from water

-         Candle needs to be replaced frequently

Activated carbon filters

2activated carbonolkop0



Activated carbon filters work on the fundamental of employing activated carbon to eliminate pesticides, chlorine and other chemical substances to a very good extent. When water is passed over the activated carbon surface, the contaminants get drawn to the surface of the carbon filter and this is how they produce potable water. They are also quite effective in altering the taste and odour. There are filters that combine this technology with UV technology too. Filters that use only activated carbon do not need electricity.


-         Ideal for people who live in areas where there are frequent power cuts

-         A better solution than Candle filters without breaking your bank

-         Low initial cost


-         Not as effective as UV filters against bacteria.

-         Need to be replaced frequently.

-         Alters the taste and odour.

Chemical based filters

4chemical based

Chemical based filters involve the use of chemicals like chlorine tablet and pure iodine crystals for making the water fit for drinking purpose. Since Chlorine is a highly efficient disinfectant, it kills viruses, bacteria and other contaminants too. But the taste of water also gets changed here.  However since they do not require electricity for functioning, they should be your ideal choice if you live somewhere which has frequent power cuts.


-         Quite effective in killing viruses, bacteria and other diseases causing pathogens

-         No need of electricity

-         Budget friendly method


-         Not the most effective form of purification

-         Taste of water gets changed

UV Technology filters

kent .;l

UV-based systems have the ability to destroy 99.9% harmful microorganisms without affecting the taste and odor of water. In UV water purification technique, impure water is exposed to UV rays which kill even the smallest of all molecular impurities such as bacteria, viruses and tiny solids. This is one of disinfection methods which are approved by the FDA, United States. Some purifiers work on the mechanism of bulbs and some on lamps. Usually they also combine activated carbon filter and reverse osmosis technology.


-         Eliminates all microorganisms

-         Does not alter the taste, odour or pH balance of water


-         Expensive

-         Not quite effective in killing harmful substances such as heavy metals or Volatile organic compounds.

-         Requires electricity and running water for functioning.

-         Requires timely servicing

Reverse Osmosis

5ro uv

Now comes the most expensive technology for domestic water purifier. A reverse osmosis water purifieremploys two carbon filters and a very thin membrane for the purpose for being used as a third filter. It involves multiple purification stages to provide you potable water that is high in quality. It kills microorganisms and other harmful elements as well as improves the taste and odour of water. However you should know that RO also filters out the essential minerals which are good for health. They should be your ideal choice if where you live receives hard water. They can be fitted under the counter beneath the kitchen faucet and even on wall. The most advanced and popular combination these days is that of RO with UV and UF which gives the purest form of water.


-         Provides the highest quality level of drinking water.

-         Removes all types of impurities

-         Improves taste and odour.


-         Very expensive.

-         Eliminates minerals which are good for health

-         Slow filtration process

-         Requires regular servicing

Based on Body type

The material which has been used for construction of a water purifier is also very crucial.


Steel is considered as the best material as it doesn’t interferes in the filtration process or reacts with any impurities. It is extremely safe and durable.


Aluminium is considered as an inferior option here as it reacts with the salts and minerals in water and oxidizes the quality of water, thereby making it even more unsafe.

Based on use of electricity

Purifiers are both manual and electric. If you stay in an area where there are frequent power cuts, it is better that you opt for non-electric water purifiers. There are two types of non-electric water purifiers as listed below:


The online types are usually fixed to the mouth of the tap and contaminated water is purified directly as it runs. Plus since they are portable, they make for a travel friendly option too!


The offline types are also known as water filters and use a mixture of activated carbon and sediment filters. Clean water can be easily store in them.

Best Water Purifier Brands in India

If you are wondering which the best water purifier brands in India are, here’s a list to help you:


When we hear the name ‘Kent’, the first image that comes to our mind is that of Hema Malini! It launched itself in Indian market in 1999 and has grown on to become one of the most renowned brands in India in various categories. No doubt, it has earned the trust of a countless number of people.


Aquaguard is of the oldest water purifier brands and I’m sure that it needs no introduction! You can buy different types here such as Aquaguard Magna, Aquaguard Reviva, Aquaguard Eterneti, Aquaguard Enhance RO+UV and more also.


A water purifier brand of Hindustan Unilever, Pureit sells its products in more than 8 countries. The popular variants are Pureit classic, Pureit Marvella and Pureit Ultima RO+UV.

Zero B

Zero B is a water purifier brand by Ion Exchange Limited and has its presence in other countries too. If you want the combination of good quality and budget, turn to Zero B and you won’t be disappointed.


Aquafresh is also a very popular choice when it comes to choosing water purifiers. You can shop for different versions of water purifiers here such as Aqua super grand, Aqua dolphin, and Aqua Pearl.

Final thoughts

Do your homework carefully and know about the various pros and cons of different types of water purifiers. Understand which one removes impurities effectively but also keep in mind capacity, purchase cost, maintenance cost, convenience and electricity requirement.

Ask these questions from yourself:

Do I want an electric or non-electric water purifier?

What kind of water is supplied in my area?

Can I bear the maintenance costs?

How is the water supply in my house?

How are the after sales services of the company?

How much can I afford to spend?

Then your mind will be much clearer and you will on your way for purchasing a water purifier quickly.

Author: Heena

While some people love to collect coins and marbles, Heena loves to collect all things girly and cute! She is a content writer at CashKaro and often likes to lose herself in good books. Besides that, she’s a glutton and likes to visit new food outlets as and when she can.

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1 Comment

  1. Nice blog and attractive information. Yes, Reverse Osmosis Provides the Highest quality of drinking water. But this Product is Very Expensive. All Best Water Purifier brands are good, But i like Aquafresh.

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