How To Choose A Water Purifier?

YOUR ULTIMATE WATER PURIFIER BUYING GUIDE IS HERE!

There are so many questions that comes to your mind when you have decided to buy a water purifier for your home use. The obvious one is Which is the best water purifier or water filter to buy? Should I buy it online or from a showroom? Which a good water purifier for borewell water? There are so many questions in your mind. This article will guide you on answering these questions.

Selecting a suitable Water Purifier

Before choosing a purifier, it is important to know about the quality of water supply, essential purification stages, technical information about its filtering media, components quality, consumables life based on consumption, ease of use, the cost of maintenance etc.

  • The quality of water supply: Most of the products in the market have multiple stages of purification. These stages must be selected based on the quality of water supply.
    It should be noted that adding unnecessary stages will increase the cost of the product as well as the maintenance.
  • Stages of Purification: Stages of purification should be determined based on the source of water and possible contaminants present in them.
  • Electricity and non-Electric: Most of the water purifiers in the market now uses electricity. However, there are some products in the market available that do not require electricity.
  • Storage Capacity: Storage capacity is provided in many purifiers to ensure that pure water is available all the time. It should be selected based on the quantity of water consumption and availability of electricity. Instant water purifiers (UF) does not require storage.
  • Maintenance: Maintenance of water purifiers depends on many factors like the technology, quality of water supply, the rate of consumption etc. An ideal water purifier should have low maintenance cost.
  • After sale service: This is an important point to consider because most of the water purifier will have to replace cartridges once they run out of their life. Different cartridges will have a different life time.
  • Warranty and installation: This depends on the company. Some companies offer extended warranty and free installation while others don’t.

Types of Water Purifiers

Universal Water Purifiers/Multi-stage water purification system

Depending on the quality of the water supply, more stages of purification are incorporated into a single unit to ensure safe potable water supply. Many companies manufacture purifiers combining the power of 2-3 purification processes in multi- steps to purify water. It also enhances the life of various cartridges.

Most commonly used combination of filtration stages in Water Purifiers

RO+UV
Most of the water purifiers mainly use RO to reduce the dissolved and suspended contaminants and UV to sterilize the water. However, 100% Ro purified water will be tasteless and are not preferred for consumption because of extremely low TDS content. Some purifiers overcome this by bypassing the RO cartridge and providing a regulator for manual adjustment. This approach is not really preferable because the water bypassed might still contain toxic contaminants.
Some purifiers achieve 100% RO filtration and then add a mineraliser cartridge as a post purification treatment.
Example:

  • HUL Pureit Ultima RO + UV
  • Eureka Forbes Aquaguard Enhance 7-Litre RO+UV Water Purifier
  • Livpure Eco Touch 2000 RO+UV Water Purifier

RO+UV+UF
Mostly, a UF(Ultra-filtration) cartridge is added in those products which bypass RO water. UF cartridge removes small suspended particles whose size is above the pore size of the membrane (around 0.01 micron).But the bypassed water might contain dissolved metal contaminants which cannot be removed by UF.These purifiers are suitable for Purification of Brackish / Tap Water
Example:

  • Kent Grand Plus TDS 8 L RO + UV +UF Water Purifier
  • Livpure Envy Plus RO+UV+UF Water Purifier with Pre-Filter
  • LG WW180EP 8L RO+UV+UF Water Purifier with SS Tank


UV+UF
Here UF and UV is used along with Carbon and sediment filters. UF removes contaminants like colloids, proteins, bacteria, pyrogens, proteins, and macromolecules larger than the membrane pore size from the water. UV is then used to sterilize the water. These purifiers are ideal if the water source does not contain dissolved chemical contaminants. Purification is done instantly, making storage not necessary if the power supply is guaranteed.

  • Aquaguard Superb 6.5 litre UV+UF water purifier
  • Tata Swach Viva Silver UV+UF Water Purifier
  • Livpure Glitz 7L UV+UF Water Purifier

UV
Ultraviolet water purification is the most effective way of disinfecting the bacteria from water.It is suitable for water sources with low TDS. It does not require any storage tank since it water is purified instantly.sediment filter and carbon filter are used in UV purifier to improve purification and to enhance the life of UV filter.

  • Aquaguard Compact UV Water Purifier
  • Kent Maxx 7-Litre UV Water Purifier
  • Eureka Forbes Aquasure Smart UV Purifier

RO + Mineral Cartridge
It is recommended for the areas with high TDS content in water.These purifiers achieve 100% RO and then a mineraliser cartridge ensures the output water contains all the necessary minerals and enhanced taste.
Example:

  • Dr. Aquaguard Magna HD RO + Mineral Cartridge + Biotron
  • HUL Pureit Marvella Slim RO Water Purifier
  • Zero B Sapphire RO

Miscellaneous

Faucet water filters
One of the simple ways to have clean drinking water directly from a tap is with a faucet water filter.They can remove or at least reduce the bad taste, mud and chlorine. They require low maintenance and are mostly quite inexpensive. Various models can rely on different technologies for eliminating the contaminants in the water.The most effective faucet filters use a multi-stage filtration method like carbon filter, UF filter and sediment filter
Pros

  • They are very easy to install and most require no tools; they simply click onto the faucet
  • Most faucet filters have a valve that allows you to switch back and forth between filtered and unfiltered tap water
  • Filtered water is made much faster than water filter pitchers.
  • The higher-quality faucet filters use multi-stage filters that remove many water contaminants.
  • These filters improve water taste and reduce odors.
  • They have very little, if any, water waste.
  • the filter replacements are fairly inexpensive

Cons

  • The biggest consumer complaint about these types of filters is that they tend to leak
  • Filters need to be changed fairly frequently, about every 3 months
  • Consumer reviews have also reported some issues with faucet filters clogging or breaking
  • Some models tend to slow the flow of water. In general, the flow rate is slower than with countertop models
  • These filters cannot be used with all types of faucets

Some additional features you should know

Before spending on water purifiers, it is better to know about various additional technologies available for different price groups.

100% RO

Most of the companies does not provide 100% RO purified water because it is nearly tasteless like distilled water. A particular quantity of water bypasses the RO to maintain an acceptable level of TDS for drinking water. The bypassed water is usually passed through other filters like UF or MF and is regulated using TDS controller.However, he bypassed water may still contain dissolved impurities like lead, arsenic, fluoride, pesticides etc. But there are few products which offer 100% RO. Re-mineraliser cartridges are used to maintain essential minerals and good taste.

Some examples of products that provide 100% RO are:

  • A. O. Smith X4
  • A. O. Smith Z6+ Hot
  • HUL Pureit Ultima Ex RO+UV
  • HUL Pureit Marvella Slim RO

High Recovery Rate (HRR)

Conventional RO purifiers wastes around 80% of inlet water and recovers only 20% as purified water. Since water wastage by RO systems can magnify the issue of shortage in potable water, this problem needs to be addressed.

A properly designed and efficient RO system like the HRR technology can reduce water wastage. This technology was introduced by Zero-B. They claim upto 80% water recovery in some of their products.

No water wastage RO Purifier

As a solution for RO water wastage, many companies came up with purifiers with a reject-water tank. Water from this tank can be used for various other household purposes like washing utensils, watering plants, cleaning floor etc.Kent Supreme is one such product that have high recovery rate as well as a 9l reject-water tank.

G Tech

Not every source of water requires to be RO purified. Since RO wastes a huge amount of water, purifiers like Aquaguard Genesis from Eureka Forbes came up with a technology senses the quality of water and chooses the optimum purification technology RO + UV/UF + UV to purify water. UF + UV purification is instantaneous and wastes no water unlike RO. This feature reduces water wastage as well as improves the cartridge life of RO.

Biotron Technology

Aquaguard Purifiers from Eureka Forbes comes with a Biotron cartridge. The company claims that this technology magnetises and de clusters the water molecules which makes it easy for the body to absorb.

Ionised alkaline water

Coway inception is a product that comes with both clean filtered water as well as ionised alkaline water.  The product also lets user control the alkaline level depending on the requirement. The company claims that ionised alkaline water is better for various activities like boiling vegetables and cooking. Various sources suggest that alkaline ionised water have some health benefits too.

Ozone Generators

Ozone is a powerful oxidant that can oxidise contaminants in water. Ozone generators has been used for cleaning fruits and vegetables as well. Recently some water purifiers were launched with integrated ozone generators that helps user to clean chemicals and pesticides from the surface of fruits and vegetables. Pureit Ultima Oxytube from Unilever is one such product.

Popular water purifier models in India

Entry level water purifiers under 10,000

  1. HUL Pureit Marvella Slim RO Water Purifier
  2. Eureka Forbes Aquasure Smart UV Purifier
  3. Tata Swach Viva Silver UV+UF  6-Litre Water Purifier
  4. HUL Pureit Advance UV+RO
  5. Kent Ultra UV Water Purifier

Best water purifier 10,000-18,000

  1. HUL Pureit Marvella RO + UV 10-Litre Water Purifier
  2. Eureka Forbes Aquaguard Enhance 7-Litre RO+UV Water Purifier
  3. Eureka Forbes Aquaguard Reviva 8-Litre RO+UV Water Purifier
  4. Livpure Eco Touch 2000 RO+UV Water Purifier
  5. Kent Grand Plus TDS 8 L RO + UV +UF Water Purifier

Best water purifier above 18000

  1. HUL Pureit Ultima 8-Litre RO + UV Water Purifier with Oxy Tube
  2. Kent Superb 9 L RO + UV +UF Water Purifier
  3. Pureit ultima 10 L RO + UV Water Purifier
  4. Eureka Forbes Aquaguard Geneus RO+UV 7-Litre Water Purifier
  5. LG WW180EP RO+UV+UF+SS+8L

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