Choosing the right Water Purifier - the Only Guide You Need

Choosing the right water purifier

The Best Water Purifier of 2018 - Our Recommendation

Kent Grand Plus 8-Litre Mineral RO + UV/UF with TDS Controller

With 8-litres of storage and a double purification technology using UV+UF, this is our recommended Water Purifier for 2018. The included TDS controller ensures that essential minerals remain in your drinking water, so that you can maintain your healthy lifestyle!

Read our full review here

Why Would I Need a Water Purifier?

It's no news that the water we drink comes from various sources, natural or man-made. With this comes endless possibilities for contaminants and other intrusions along the way before the water finally reaches our mugs.

In fact, most of the curries we prepare everyday require water too, so you see just how much of a presence water has in our day-to-day lives!

Given that our bodies are mostly composed of water and it's thus a necessity, it's pretty obvious that we'd want to make sure that the water we drink everyday doesn't come at a major risk to our family's health.

Our solution to all this is clear - Water Purifiers.

But choosing the right water purifier can be tricky, and sometimes not cost-effective at all.

This is why we've prepared this one-stop guide that will answer your common queries and ensures that the Water Purifier you choose is the only one you'll ever need!

Types of Water Impurities

Firstly, we've got two types of water always:

  • Hard
  • Soft

Soft water contains fewer impurities and is generally available through natural means like lakes, rivers or even rainwater.

Water is hard when it contains a LOT of dissolved salts. Salts may include calcium, phosphate, potassium, fluoride and sometimes even heavy metals!

The amount of dissolved solvents in water that makes it hard is determined by the TDS level of the sample.

TDS levels?!...

...It's an industrial term that stands for Total Dissolved Salts and can be described using this simple illustration:

TDS levels in water

You can read more about TDS here.

Fact: Bottled water can contain higher levels of TDS than even tap water!

Apart from dissolved solvents, other impurities (which could really pose a problem) are bacteria and viruses that carry water-borne diseases.

Type of WaterSource
HardTankers, wells, industrial pipes. Stored mostly in man-made structures.
SoftLakes, rivers, rainwater. Natural sources.

It is therefore important to remove all impurities before the water that reaches your home is safe to drink.

Let's take a look at how we can do this using different types of Water Purifiers and also how efficient they can be depending on the situation.

Reverse Osmosis - RO Water Purifier

RO Water Purifiers are perhaps the most popular and commonly known portable water filtration systems in India.

These make use of the process of Reverse Osmosis to ensure that all sorts of particulates present in the water are removed efficiently.

This makes the water too clean, in fact, and sometimes this may not be the best approach.


Because drinking water should ideally contain healthy minerals that are beneficial to us. The RO filter could remove these minerals as well because of their minute size and the water we drink will taste bland and have no extra benefits for us.

RO water purifiers are hence recommended when your water supply contains hard water having high amounts of TDS contaminants.

 Advantage Disadvantage
+Efficiently removes soluble impurities-Small membrane filter removes nutrients as well
+Perfect for hard water-Requires electric power
+Water is very safe to drink-Water is wasted during the filtration process

Our recommendation - HUL Pureit Marvella Slim RO

Ultraviolet - UV Water Purifier

What happens when the water you get at your home or office has a bad smell or gives you stomach problems?

Well of course you will realize that the water you're drinking is contaminated with organic pollutants such as bacteria or viruses.

In such cases, UV Water Purifiers are your best bet. See how they work in the video below:

Making use of powerful Ultraviolet rays (just like our Sun), this is the only means of eradicating disease-causing germs from your water supply.

These would also require some kind of sediment filter to help with the inorganic solvents. Because of this, UV purifiers are better suited when the water is soft.

 Advantage Disadvantage
+Kills disease causing germs, including bacteria and viruses-Expensive
-Doesn't remove soluble impurities
-Requires electric power

We recommend the Livpure Glo 7-Litre RO + UV + Mineralizer.

Ultrafiltration - UF Water Purifier

When electricity is your primary concern, only then would we recommend choosing a UF Water Purifier.

They make use of a bigger membrane than an RO filter and this way most of the major solvents can be filtered out through the difference in gravity alone.

You get to keep your good minerals as well, but there's no guarantee that all impurities (dissolved ones, especially) are removed through this method.

Read more about Ultrafiltration technology.

Our recommendation - go for a UF purifier when you're under a tight budget but don't want dirt in your drinking water.

 Advantage Disadvantage
+No electricity needed-Some soluble impurities will remain
+Affordable-Doesn't kill germs
+Nutrients remain in water

Gravity-based Water Purifier (Non-Electric)

Perhaps the most portable of the lot, as well as the most affordable, Gravity-based Water Purifiers are a common sight in offices and some homes as well.

These are only really suitable when the water that is passing through the purifier is already free of most impurities.

It is normal to have one of these for a quick glass of water out of a gallon of mineral water that you buy from the market.

Everybody should own one, if only for how convenient it is.

 Advantage Disadvantage
+Very affordable-Filtration is not effective enough
+Portable-Doesn't kill germs
+Low maintenance

We recommend the Kent Gold Optima 10-Litre Gravity Based purifier.

Ok, So Which Water Purifier Do You Recommend?

To not further complicate things for you, here's a simple diagram that will help you decide what Water Purifier is best for you and your family or workplace:

4 types of water purifiers

What About Water Purifier Maintenance?

While not too difficult to do on your own, it is best to let a nearby professional handle your water purifier maintenance.

We have a list of water purifier dealers in India that you can filter based on your location. Hint: Bookmark the page so you always know whom to call.

If you'd still prefer the solo route, take a look at this checklist you should follow to maintain your water purifier in good shape:

Water purifier maintenance checklist

Share this handy checklist with your friends to help them maintain their water purifiers!

RO + UV + UF - The Best Water Purifier?!

Here at, we care about your health and that of your family and friends.

This is why our personal recommendation is to go for a high quality, multi-faceted filtration system that removes all impurities from your drinking water but at the same time keeps the nutrition intact for your wellness.

Our current top pick for the Best Water Purifier in India this year is the Kent Grand Plus 8-Litre Mineral RO + UV/UF with TDS Controller.  Read why we believe this is the only water purification system you'll ever need by checking out our detailed review on it.