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The sheer number of brands and models on the market might easily overwhelm someone trying to buy a new Water Purifier. To find the right water purifier that meets your requirements and budget, read our quick Water Purifier buying guide. Here we explain which one to consider based on water type, capacity, and other features.

Choosing the right Water Purifier

Water Type

The first step in choosing the right water purifier for your home is to understand your requirements and the prevalent water quality. The Total Dissolved Salts (TDS) refers to the amount of impurities in the water, such as potassium, sodium, chlorine, magnesium and more.

Water Type Hard Water Soft Water
Sources Underground Water, Bore Wells, Tanker Supply Rivers, Lakes, Rain Water, Municipal Supply
Indicator Mineral strains and film on hand post wash Thick lather when washing clothes
Impurities Fluorides, Arsenic, Lead and other Heavy Metals Self Sodium Ions and Compounds
Recommendation RO is a must for hard water and supplementing it with UV and UF helps in high contamination cases UV is advisable for soft water, supplemented with UF

Impurity Type

Impurity Type Water Source Effect on Water
Solid Particles: Sand, Dust, Mud Bore Wells, River Water and Damaged Pipes Dirty, Muddy Appearance
Dissolved Inorganic Compounds of Sodium and Potassium Bore Wells and Sea Water Salty Taste
Dissolved Inorganic Compounds of Calcium and Magnesium Bore Wells and River Water Scaly, Hard Water
Organic Compounds Lake Water and Pond Water Bad Smell
Decontaminants: Chlorine, Pesticides Municipal Water Supply Bitter Taste
Biological Contaminants: Bacteria, Viruses Water Tankers and Damaged Pipes Waterborne Diseases

Purification Technology

Reverse Osmosis (RO) Technology

  • Uses a fine (0.0001 microns) semi-permeable membrane to eliminate impurities
  • Removes calcium and magnesium compounds, reducing the hardness of water
  • Eliminates dangerous chemicals like fluorides, arsenic, lead and mercury
  • Ideal for a TDS of 200 ppm to 2000 ppm
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Ultraviolet (UV) Technology

  • Uses intense ultraviolet rays to kill or inhibit bacteria and viruses
  • Suitable for low TDS water, does not remove dissolved impurities
  • Recommended to supplement with pre-filters or an activated carbon filter
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Electro-Adsorption Technology (EAT)

  • Utilizes a 5-step process, with different filters that remove varying degrees of impurities
  • Removes dirt, dust, silica and suspended particles first, followed by ions, cysts, germs and bacteria
  • Finally, harmful chemicals such as lead, arsenic, chlorine and pesticides are removed
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Ultrafiltration (UF) Technology (GRAVITY-BASED)

  • Gravity-based water purifier, ideal for cyst removal
  • Consumes no electricity
  • Suitable for low TDS water, does not eliminate dissolved minerals
  • Recommended to supplement with sediment and activated carbon filters
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Alkaline Technology

  • pH-based filter
  • Used to remove harmful acids from water
  • Suitable for low TDS water
  • Recommended in areas where water tastes sour or acidic
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Find Your Type

TDS (IN PPM) Total Water Clarity Presence of Bacteria or Viruses Recommended Type
Below 300 ppm
Gravity-Based Purifiers
Below 300 ppm
UV
Below 300 ppm
UF
Below 300 ppm
EAT or UF+UV
Over 300 ppm
RO
Over 300 ppm
RO+UV
Over 300 ppm
RO+UF or RO+UV+UF
Over 300 ppm
RO+UV+UF

Key Features

Storage Tank

  • Stores purified water for later use, ideal for areas with inconsistent electricity
  • Ensure that material used for the tank is food grade and non-toxic
  • The latest water purifiers have stainless steel tanks, highly resistant to rust
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TDS Controller

  • Controls output TDS levels, generally used in RO purifiers
  • Can be used to maintain healthy levels of required minerals in water
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Display

  • Conveys information regarding water levels, purifier status and more on a screen
  • Display features such as TDS Level Indicator, Fault Alert, Filter and Membrane Change Indicator are useful
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Activated Carbon Filter

  • Eliminates chlorine and organic impurities like pesticides
  • Removes organic compounds that cause bad taste and foul odour in the water
  • A carbon post filter is used for final purification and taste enhancement
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Membranes and Filters

  • UF membranes remove minute soil impurities and suspended particles
  • RO membranes eliminate dissolved salts, heavy metals and biological impurities
  • UV filters inactivate viruses, bacteria and parasites
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Sediment Pre-Filter

  • Eliminates both coarse and fine particulate impurities like dirt, dust and mud
  • Improves the life of the RO/UF membrane, also reducing maintenance cost
  • Can be added to an existing water purifier as an attachment
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