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Water contains dissolved impurities like bacteria, virus, heavy metal & salt, pesticide, etc which can cause water-borne diseases. RO is the only technology which can effectively remove those impurities and provide purest form of water.

You can see list of our HUL VS Eureks Forbes VS LG - RO Water Purifiers below, perform Side-by-Side comparison. If you need further help, do have a look at Conzumr Guides and Tips. Alternatively you can view all Water Purifier to choose your own favourites.


Reverse osmosis is the key principle behind RO water purifiers. Water from higher TDS (total dissolved solids) level – that is, very hard water – is transferred to the lower TDS level through a filtering membrane. RO technology uses high pressure to push water through an extremely fine filter or membrane. The holes in this membrane are as small as .0001 microns. They remove dissolved salts along with pollutants and other physical contaminants including virus, and harmful metals, minerals, bacteria and microorganisms. Most of the RO purifiers also comprise of TDS controllers (to adjust the TDS level). The filter is kept clean by flushing the separated contaminants so they drain away.

In the quest to live healthier lives, many people have turned to water filters. Some water filters fit into pitchers to provide clean drinking water. Some filters attach to faucets and filter water as it flows out of the tap, and still others filter water as it enters a house so that all of the water in the home is filtered.


Hindustan Unilever Pureit Marvella RO

Hindustan Unilever Pureit Marvella RO

  • Environmental Protection Agency (EPA), USA certified
  • Highest Level of TDS Removal to give clear, safe, great tasting water
  • Advanced 6 stage purification systemTriple Safety Assurance (RO+ UVM+ ROPL)
  • Advanced Alert System
  • Fully Automatic- Senses if the water tank is not full, purifies and stores 8 L of water automatically

Eureka Forbes Dr. Aquaguard Magna HD RO

Presenting the new Aquaguard Magna with patented Mineral Absorption Technology.

Dr. Aquaguard Magna HD RO is a unique RO water purifier that is suitable for areas with water having a high TDS, giving it a salty taste. Its state-of-the-art HD RO Technology ensures that the water you get is pure and sweet tasting. Its Mineral Cartridge and Biotron Cartridge™ ensure that essential minerals like Calcium & Magnesium necessary for your health are retained.

Eureka Forbes Aquaguard Reviva RO

A sensitive new offering that celebrates the perfection of purity.

Aquaguard Reviva RO is an RO water purifier best suited for water with high TDS, having a salty taste. It is equipped with a unique RO technology membrane that removes excess TDS and blocks impurities and chemical contaminants dissolved in water. Its Electronic Membrane Life Enhancer prevents accumulation of dissolved salts like Calcium & Magnesium enhancing the service life of the RO membrane. Only Aquaguard, with Advanced Mineral Guard Technology removes dangerous new age contaminants like lead, pesticides, while retaining essential natural minerals in water, that other RO purifiers deplete.

LG WAW35RW2RP

Lg's true water purifier is best combination of true ro filtration, true preservation & true maintenance

LG's new water purifier combines great innovations to go beyond traditional purity. Its Stainless Steel Water Tank prevents bacteria proliferation found in plastic tanks.

LG water purifier has 2-in-1 Water Solution including UF filter system to provide you convenience. Veggie & fruit cleaner is located on the side of the water purifier. It is specialized in cleaning vegetables & fruits and it even saves water.LG’s innovative Digital Sterilizing Care™ provides most hygienic method to sterilize the entire water path, faucet & tank with unique sterilizing kit that does not use any harmful chemical. LG’s Happy Care Service ensure automatic & hassle free periodic service without any follow-ups. Hence, enjoy the pure & healthy water for longer time.
  • True ro filtration
  • Dual protection stainless steel tank
  • Digital sterilizing care
  • Hot & cold & normal temperature
  • Smart lightning feature
  • Filter change indicator

Eureka Forbes Aquaguard Enhance RO

Give your family pure and fresh water, with the help of Multi-stage unique Reverse Osmosis water purification process.

Aquaguard Enhance RO is an RO water purifier best suited for water with high TDS, having a salty taste. Its multi-stage unique Reverse Osmosis water purification process ensures that the water you drink is free from disease causing bacteria, virus, protozoa,cysts. Its advanced RO membrane technology removes excess TDS & blocks impurities and chemical contaminants dissolved in water giving you sweet tasting water. Only Aquaguard, with Advanced Mineral guard technology removes dangerous new age contaminants like lead, pesticides, while retaining essential natural minerals in water, that other RO purifiers deplete


Side by Side comparison

Alt Model #
Pureit Marvella RO : 
Dr. Aquaguard Magna HD RO : 
Aquaguard Reviva RO : 
WAW35RW2RP : 
Aquaguard Enhance RO : Enhance RO
Series #
Pureit Marvella RO : Marvella
Dr. Aquaguard Magna HD RO : Dr. Aquaguard Magna
Aquaguard Reviva RO : Aquaguard Reviva
WAW35RW2RP : WAW
Aquaguard Enhance RO : Aquaguard Enhance
Pureit Marvella RO
Dr. Aquaguard Magna HD RO
Aquaguard Reviva RO
WAW35RW2RP
Aquaguard Enhance RO
Highlights
Installation
Pureit Marvella RO : Counter-Top, Wall Mounted
Dr. Aquaguard Magna HD RO : Counter-Top, Wall Mounted
Aquaguard Reviva RO : Counter-Top, Wall Mounted
WAW35RW2RP : Wall Mounted
Aquaguard Enhance RO : Counter-Top, Wall Mounted
Total Score out of 100
Pureit Marvella RO : 70
Dr. Aquaguard Magna HD RO : -
Aquaguard Reviva RO : -
WAW35RW2RP : 72
Aquaguard Enhance RO : -
Purification Capacity Per Hour
Pureit Marvella RO : 12 Ltr/hr
Dr. Aquaguard Magna HD RO : 12 Ltr/hr
Aquaguard Reviva RO : 12 Ltr/hr
WAW35RW2RP : -
Aquaguard Enhance RO : 12 Ltr/hr
MRP (Rs)
Pureit Marvella RO : 16000
Dr. Aquaguard Magna HD RO : -
Aquaguard Reviva RO : -
WAW35RW2RP : 21990
Aquaguard Enhance RO : -
Pureit Marvella RO : RO
Dr. Aquaguard Magna HD RO : HD RO
Aquaguard Reviva RO : RO
WAW35RW2RP : RO
Aquaguard Enhance RO : RO
RO: Reverse Osmosis
HD RO: The new space-age high definition RO membrane of Dr. Aquaguard Magna is designed for superior performance to ensure high water recovery and retention of natural minerals. Unique RO technology membrane removes excess TDS, blocks dissolved impurities and chemical contaminants, while retaining essential minerals in the drinking water
RO: Reverse Osmosis
Power Consumption
Pureit Marvella RO : 36 W
Dr. Aquaguard Magna HD RO : 35 W
Aquaguard Reviva RO : 40 W
WAW35RW2RP : 32 W
Aquaguard Enhance RO : 35 W
Storage
Pureit Marvella RO : 
Dr. Aquaguard Magna HD RO : 
Aquaguard Reviva RO : 
WAW35RW2RP : 
Aquaguard Enhance RO : 
Tank Capacity
Pureit Marvella RO : 10 L
Dr. Aquaguard Magna HD RO : 7 L
Aquaguard Reviva RO : 8 L
WAW35RW2RP : 8 L
Aquaguard Enhance RO : 7 L
Manufactured/Marketed by
Pureit Marvella RO : Hindustan Unilever Ltd
Dr. Aquaguard Magna HD RO : -
Aquaguard Reviva RO : -
WAW35RW2RP : LG Electronics Pvt. Ltd
Aquaguard Enhance RO : -
Electric
Pureit Marvella RO : Electric
Dr. Aquaguard Magna HD RO : Electric
Aquaguard Reviva RO : Electric
WAW35RW2RP : Electric
Aquaguard Enhance RO : Electric
Warranty(Months)
Pureit Marvella RO : 12
Dr. Aquaguard Magna HD RO : 12
Aquaguard Reviva RO : 12
WAW35RW2RP : 12
Aquaguard Enhance RO : 12
Warranty Terms
Pureit Marvella RO : 
Dr. Aquaguard Magna HD RO : The Goods are warranted against defects arising from faulty designs, workmanship and materials for 12 months from the date of Installation or 15 months from the date of sale, whichever is earlier subject to the Terms and Conditions applicable.
Aquaguard Reviva RO : The Goods are warranted against defects arising from faulty designs, workmanship and materials for 12 months from the date of Installation or 15 months from the date of sale, whichever is earlier subject to the Terms and Conditions applicable.
WAW35RW2RP : 
Aquaguard Enhance RO : 
Design
TDS Controller
Pureit Marvella RO : -
Dr. Aquaguard Magna HD RO : 
Aquaguard Reviva RO : -
WAW35RW2RP : -
Aquaguard Enhance RO : 
Number of Purification Stages
Pureit Marvella RO : 6
Dr. Aquaguard Magna HD RO : -
Aquaguard Reviva RO : 5
WAW35RW2RP : 5
Aquaguard Enhance RO : 5
Colour
Pureit Marvella RO : Silver
Dr. Aquaguard Magna HD RO : White with Black
Aquaguard Reviva RO : White and Blue
WAW35RW2RP : White
Aquaguard Enhance RO : White with Black
Material of Body
Pureit Marvella RO : Food grade, non-toxic, engineering grade plastic
Dr. Aquaguard Magna HD RO : -
Aquaguard Reviva RO : ABS Plastic
WAW35RW2RP : -
Aquaguard Enhance RO : ABS Plastic
Brands Tested
Rank
Pureit Marvella RO : 4
Dr. Aquaguard Magna HD RO : -
Aquaguard Reviva RO : -
WAW35RW2RP : 2
Aquaguard Enhance RO : -
General Specification
UV Lamp Power
Pureit Marvella RO : -
Dr. Aquaguard Magna HD RO : -
Aquaguard Reviva RO : -
WAW35RW2RP : -
Aquaguard Enhance RO : 11 W
Input Water Pressure (kg/cm2)
Pureit Marvella RO : 0.35 - 2.11
Dr. Aquaguard Magna HD RO : 0.6
Aquaguard Reviva RO : 2
WAW35RW2RP : -
Aquaguard Enhance RO : 2
Input Water Temperature
Pureit Marvella RO : -
Dr. Aquaguard Magna HD RO : 10-40 °C
Aquaguard Reviva RO : 10-40 °C
WAW35RW2RP : Room Temperature °C
Aquaguard Enhance RO : 10-40 °C
Other Features
Pureit Marvella RO : -
Dr. Aquaguard Magna HD RO : -
Aquaguard Reviva RO : Unique E-boiling Technology - Automatic Water Level Sensor - Silver Surety Technology - Dual Flow Tap - Electronic Membrane Life Enhancer EMLE
WAW35RW2RP : -
Aquaguard Enhance RO : Unique E-boiling Technology - Automatic Water Level Sensor - Silver Surety Technology - Dual Flow Tap - Electronic Membrane Life Enhancer EMLE
Applicable TDS Range in Input Water
Pureit Marvella RO : -
Dr. Aquaguard Magna HD RO : 500 - 2000 mg/litre
Aquaguard Reviva RO : 500 - 1500 mg/litre
WAW35RW2RP : -
Aquaguard Enhance RO : 500 - 2000 mg/litre
Max Input water chlorine
Pureit Marvella RO : -
Dr. Aquaguard Magna HD RO : 0.2 mg/litre (max.)
Aquaguard Reviva RO : 2ppm (max.)
WAW35RW2RP : -
Aquaguard Enhance RO : 2ppm (max.)
Input Water Turbidity
Pureit Marvella RO : 10 NTU
Dr. Aquaguard Magna HD RO : 15 NTU (max.)
Aquaguard Reviva RO : 15
WAW35RW2RP : -
Aquaguard Enhance RO : 15 NTU
Input Water Iron content ( Max)
Pureit Marvella RO : 0.3 mg/lit. (max)
Dr. Aquaguard Magna HD RO : 0.3 mg/lit. (max)
Aquaguard Reviva RO : 0.3 mg/lit. (max)
WAW35RW2RP : -
Aquaguard Enhance RO : 0.3 mg/lit. (max)
Purification
Pureit Marvella RO : -
Dr. Aquaguard Magna HD RO : High TDS (Borewells)
Aquaguard Reviva RO : High TDS (Borewells)
WAW35RW2RP : -
Aquaguard Enhance RO : High TDS (Borewells)
High TDS (Borewells): Water sourced from borewells with high TDS (Salty/Khaara/Brackish Water)
High TDS (Borewells): Water sourced from borewells with high TDS (Salty/Khaara/Brackish Water)
Pureit Marvella RO : Activated Carbon, PP Melt Brown, RO Membrane, Ultra ventilated membrane
Dr. Aquaguard Magna HD RO : Biotron Cartridge, EMLE, HCCB (Hybrid Carbon Chemi Block) Cartridge, HD Filter Cartridge, Mineral Cartridge, RO Membrane
Aquaguard Reviva RO : Chemi block, EMLE, I-Filter, RO Membrane, Taste Enhancer Cartridge
WAW35RW2RP : Post Carbon, Pre carbon, Sediment Filter
Aquaguard Enhance RO : Chemi block, EMLE, I-Filter, RO Membrane, Silver Impregnated Post Carbon, Taste Enhancer Cartridge
RO Membrane: Unique RO technology membrane removes excess TDS, blocks dissolved impurities and chemical contaminants, while retaining essential minerals in the drinking water. It also helps removing dissolved salts, hardness, pesticides and heavy metals like arsenic, lead and mercury.
Biotron Cartridge: It magnetizes water and de-culsters water molecules to make the water more "bio-available" by unlocking the nutrients in water, promising you the healthiest water.
EMLE: Prevents scaling of dissolved salts on the surface of the membrane and hence enhance both membrane life and performance.
HCCB (Hybrid Carbon Chemi Block) Cartridge: Removes excess chlorine, bad odour, colour, and organic impurities. Also eliminates new age contaminants like heavy metals, chemicals and pesticides.
HD Filter Cartridge: Removes fine particles like dust, dirt, mud and sand.
Mineral Cartridge: Enhances the taste of water by removing dissolved gases like VOCs. It also increases calcium and Magnesium levels in water to balance pH.
RO Membrane: Unique RO technology membrane removes excess TDS, blocks dissolved impurities and chemical contaminants, while retaining essential minerals in the drinking water. It also helps removing dissolved salts, hardness, pesticides and heavy metals like arsenic, lead and mercury.
EMLE: Prevents scaling of dissolved salts on the surface of the membrane and hence enhance both membrane life and performance.
RO Membrane: Unique RO technology membrane removes excess TDS, blocks dissolved impurities and chemical contaminants, while retaining essential minerals in the drinking water. It also helps removing dissolved salts, hardness, pesticides and heavy metals like arsenic, lead and mercury.
EMLE: Prevents scaling of dissolved salts on the surface of the membrane and hence enhance both membrane life and performance.
RO Membrane: Unique RO technology membrane removes excess TDS, blocks dissolved impurities and chemical contaminants, while retaining essential minerals in the drinking water. It also helps removing dissolved salts, hardness, pesticides and heavy metals like arsenic, lead and mercury.
Pre-Filter Purification
Pureit Marvella RO : -
Dr. Aquaguard Magna HD RO : 
Aquaguard Reviva RO : -
WAW35RW2RP : -
Aquaguard Enhance RO : 
TDS Reduction
Pureit Marvella RO : 90 % (approx)
Dr. Aquaguard Magna HD RO : 90% (approx) in RO Mode
Aquaguard Reviva RO : 90 % (approx)
WAW35RW2RP : -
Aquaguard Enhance RO : 90 % (approx)
% Water Recovery
Pureit Marvella RO : -
Dr. Aquaguard Magna HD RO : 25% approx in RO Mode
Aquaguard Reviva RO : 25% approx
WAW35RW2RP : -
Aquaguard Enhance RO : 25% approx
Membrane Type
Pureit Marvella RO : Thin film composite spiral wound
Dr. Aquaguard Magna HD RO : Thin Flim Composite RO
Aquaguard Reviva RO : Thin Film Composite RO
WAW35RW2RP : -
Aquaguard Enhance RO : Thin Film Composite RO
Weight and Dimensions
Net Weight
Pureit Marvella RO : 8.4 kg
Dr. Aquaguard Magna HD RO : 7.8 kg
Aquaguard Reviva RO : 8.5 kg
WAW35RW2RP : 11 kg
Aquaguard Enhance RO : 8.2 kg
Width
Pureit Marvella RO : 360 mm
Dr. Aquaguard Magna HD RO : 316 mm
Aquaguard Reviva RO : 320 mm
WAW35RW2RP : 365 mm
Aquaguard Enhance RO : 316 mm
Depth
Pureit Marvella RO : 265 mm
Dr. Aquaguard Magna HD RO : 251 mm
Aquaguard Reviva RO : 275 mm
WAW35RW2RP : 270 mm
Aquaguard Enhance RO : 251 mm
Height
Pureit Marvella RO : 480 mm
Dr. Aquaguard Magna HD RO : 462 mm
Aquaguard Reviva RO : 410 mm
WAW35RW2RP : 500 mm
Aquaguard Enhance RO : 462 mm
Power
Input Voltage
Pureit Marvella RO : 100-240VAC/ 50-60 Hz
Dr. Aquaguard Magna HD RO : 230VAC/ 50-60 Hz
Aquaguard Reviva RO : 230VAC/ 50-60 Hz
WAW35RW2RP : -
Aquaguard Enhance RO : 230VAC/ 50-60 Hz
Watts Combination Per Month
Pureit Marvella RO : -
Dr. Aquaguard Magna HD RO : -
Aquaguard Reviva RO : -
WAW35RW2RP : 30 kW
Aquaguard Enhance RO : -
Booster Pump Voltage
Pureit Marvella RO : 24 V
Dr. Aquaguard Magna HD RO : 24 V
Aquaguard Reviva RO : 24 V
WAW35RW2RP : -
Aquaguard Enhance RO : 24 V

The Bureau of Indian Standards (BIS) has specified requirements for removal/reduction ofheavy metals in IS:16240. We tested the 10 brands for presence of the following heavy metals:

Arsenic: As many as six brands – Tata Swach, Zero B, Kent, Aquaguard, Electrolux and Usha – did not meet the requirement (a maximum 0.01 mg/l).

Copper: None of the brands met the requirement set by Indian Standard (0.05 mg/l).

Mercuy: All the brands more or less met the specified requirement – minor deviations were observed in Pureit, Aquaguard and Usha.

Cadmium: Minor deviation was observed in one brand, Pureit. All other brands met the standard requirement.

Iron: All the brands met the requirements, with the exception of deviation in two brands, Whirlpool and Usha.

Lead and chromium: All brands met the requirements.

Score out of 14 (for all toxic metals)
Pureit Marvella RO : 12.1
Dr. Aquaguard Magna HD RO : -
Aquaguard Reviva RO : -
WAW35RW2RP : 13.55
Aquaguard Enhance RO : -
Physicochemical Parameters
Pureit Marvella RO : 4.34
Dr. Aquaguard Magna HD RO : -
Aquaguard Reviva RO : -
WAW35RW2RP : 4.63
Aquaguard Enhance RO : -
Total dissolved solids (TDS) refer to the combined content of all inorganic and organic substance contained in a liquid; these are present in a molecular, iodised, or micro-granular suspended form. RO systems are specifically designed to effectively remove TDS to a great extent. Where the TDS level of supply/ground water is high, from 1,000 up to 2,500–3,000, it is recommended that RO systems be installed for drinking-water purpose. A special cellulose membrane cartridge plays a key role in removing TDS from the input water.

As per Indian Standard, an RO system shall reduce TDS level of feed water to less than or equal to 500 mg/l.

  • Al brands reduced the TDS to below the limit specified (500 mg/l) when the input level was maintained at a fixed level.
  • Tata Swach scored highest on this parameter, followed by Aquaguard.
  • Some brands reduced the TDS level to below 100, which is also not desirable due to their reducing the intake level of essential minerals.

Pureit Marvella RO : 3.92
Dr. Aquaguard Magna HD RO : -
Aquaguard Reviva RO : -
WAW35RW2RP : 4
Aquaguard Enhance RO : -
This refers to the amount of dissolved solid particles that are suspended in the water and that cause light rays shining through the water to scatter. Thus, turbidity makes the water cloudy or even opaque in extreme cases.

The turbidity of drinking water should not be more than 5 NTU and ideally be below 1 NTU. This is a key quality indicator for a water filter/purifier.

  • All the brands were able to remove turbidity to a level that makes it safe and suitable for drinking.
  • Kent, Whirlpool, LG and Tata Swach could remove 100 per cent turbidity and scored highest on this parameter.
Pureit Marvella RO : 3.36
Dr. Aquaguard Magna HD RO : -
Aquaguard Reviva RO : -
WAW35RW2RP : 3.18
Aquaguard Enhance RO : -
As per Indian Standard, the minimum recovery of product water shall be equal to or more than 20 per cent. So, waste water should not be more than 80%.
  • Waste water was in the range of 62 per cent–71.4 per cent. This means the recovery of water in all brands was well above the prescribed limit of 20%.

RO and RO+UV water purifiers produce a lot of waste water during the purification process. Thus, if you pass four litres of water through an RO purifier, it will produce just about one litre of potable water. All the impurities are concentrated in the waste water and hence it is not drinkable.

Can the Waste Be Used?

a) First thing: test the TDS in the waste-water stream. If the TDS is below 1,000, you can use the water in your plants.

b) Alternately, mix some of that water with tap water to mop the house. Make sure you dilute it with tap water because if the TDS is high and you use just the RO waste to mop the floor, you may see some salt deposition after the water dries.

c) You can use the waste water to clean the sewage pipe at home or kitchen because of its saline nature..

d) You can use it to flush toilets.

Pureit Marvella RO : 4
Dr. Aquaguard Magna HD RO : -
Aquaguard Reviva RO : -
WAW35RW2RP : 4
Aquaguard Enhance RO : -
Taste and odour of output water should be acceptable; in other words, there should not be any bad odour or taste.

All the brands gave output water with agreeable taste and odour.

Pureit Marvella RO : 2.37
Dr. Aquaguard Magna HD RO : -
Aquaguard Reviva RO : -
WAW35RW2RP : 2.65
Aquaguard Enhance RO : -

pH is a measure of the acidity or alkalinity of a solution. Aqueous solutions at 25 degrees C with a pH less than 7 are considered to be acidic, while those with a pH greater than 7 are considered to be basic (alkaline). When pH level is 7.0, it is defined as neutral at 25 degrees C.

As per Indian Standard, the pH of drinking water shall be 6.5 to 8.5.

Four brands – LG, Pureit, Zero B and Tata Swach – showed slight deviation from the pH requirement for drinking water.

Pureit Marvella RO : 2.98
Dr. Aquaguard Magna HD RO : -
Aquaguard Reviva RO : -
WAW35RW2RP : 2.98
Aquaguard Enhance RO : -
Water hardness denotes the presence of chloride and sulphates of calcium and magnesium salts in water. It is usually expressed in milligrams per litre of dissolved calcium and magnesium carbonate. Calcium and magnesium enter water mainly through the weathering of rocks. The more calcium and magnesium in water, the harder the water.
  • The lowest percentages of hardness reduction were found in Usha (96.88), Zero B (98.89) and Whirlpool (98.89).
  • All other brands reduced hardness by more than 99 per cent
  • Pureit Marvella RO : 2
    Dr. Aquaguard Magna HD RO : -
    Aquaguard Reviva RO : -
    WAW35RW2RP : 2
    Aquaguard Enhance RO : -
    The presence of residual chlorine in drinking water indicates that a sufficient amount of chlorine added initially to the water to inactivate bacteria and certain viruses that cause diarrhoea, as well as to ensure that the water is protected from recontamination. Residues of chlorine must be absent in the output water of water purifiers. This test was conducted after all other tests.
    • All the brands were able to reduce 100 per cent residual chlorine.

    The presence of bacteria and pathogenic (disease causing) organisms is a concern when considering the safety of drinking water. Pathogenic organisms can cause intestinal infections, dysentery, hepatitis, typhoid fever, cholera and other illnesses. As per the BIS requirement, the RO purifier shall inactivate/kill the selected standard challenging organism E. coli.

    Pureit Marvella RO : 99.6
    Dr. Aquaguard Magna HD RO : -
    Aquaguard Reviva RO : -
    WAW35RW2RP : 99.6
    Aquaguard Enhance RO : -

    When E. coli exceeds the permissible level in water, consumers are advised to boil the water they use for cooking and drinking, and even for brushing teeth. As per Indian Standard, the requirement is 99.9999 percentage reduction in E. coli. We observed all tested brands for four consecutive weeks to check percantage reduction in E. coli levels.

  • None of the brands we tested.met the requirements of Indian Standard for E. coli reduction. Hence, none of these RO water filters can be said to be completely safe for drinking.
  • Pureit Marvella RO : 98.8 %
    Dr. Aquaguard Magna HD RO : -
    Aquaguard Reviva RO : -
    WAW35RW2RP : 98.8 %
    Aquaguard Enhance RO : -

    When E. coli exceeds the permissible level in water, consumers are advised to boil the water they use for cooking and drinking, and even for brushing teeth. As per Indian Standard, the requirement is 99.9999 percentage reduction in E. coli. We observed all tested brands for four consecutive weeks to check percantage reduction in E. coli levels.

  • None of the brands we tested.met the requirements of Indian Standard for E. coli reduction. Hence, none of these RO water filters can be said to be completely safe for drinking.
  • E. coli Score out of 16
    Pureit Marvella RO : 4
    Dr. Aquaguard Magna HD RO : -
    Aquaguard Reviva RO : -
    WAW35RW2RP : 3.96
    Aquaguard Enhance RO : -
    Pureit Marvella RO : 99.5 cfu/100ml
    Dr. Aquaguard Magna HD RO : -
    Aquaguard Reviva RO : -
    WAW35RW2RP : 99.4 cfu/100ml
    Aquaguard Enhance RO : -

    A microorganism smaller than bacteria, the MS2 virus cannot grow or reproduce apart from in a living cell. Viruses are the smallest agents of disease, and perhaps the most problematic, because they are as minute as 0.04 u (micron). Viruses cause many common human infections and are also responsible for a bevy of rare diseases. Viruses can infect all types of life forms, from animals and plants to bacteria and archaea.

    Based on the requirement specified by IS: 16240,MS2 virus was spiked in input water and the output sample was tested to check the virus-removal efficiency of purifiers.

    • None of the brands we tested met the requirement of Indian Standard for removal of MS2 virus. Hence, none of these RO water filters can be said to be completely safe for drinking.
    Pureit Marvella RO : 96.3 cfu/100ml
    Dr. Aquaguard Magna HD RO : -
    Aquaguard Reviva RO : -
    WAW35RW2RP : 93.6 cfu/100ml
    Aquaguard Enhance RO : -

    A microorganism smaller than bacteria, the MS2 virus cannot grow or reproduce apart from in a living cell. Viruses are the smallest agents of disease, and perhaps the most problematic, because they are as minute as 0.04 u (micron). Viruses cause many common human infections and are also responsible for a bevy of rare diseases. Viruses can infect all types of life forms, from animals and plants to bacteria and archaea.

    Based on the requirement specified by IS: 16240,MS2 virus was spiked in input water and the output sample was tested to check the virus-removal efficiency of purifiers.

    • None of the brands we tested met the requirement of Indian Standard for removal of MS2 virus. Hence, none of these RO water filters can be said to be completely safe for drinking.
    MS2 Virus Score out of 16
    Pureit Marvella RO : 4.12
    Dr. Aquaguard Magna HD RO : -
    Aquaguard Reviva RO : -
    WAW35RW2RP : 4.08
    Aquaguard Enhance RO : -
    Pureit Marvella RO : Able to reduce the pesticide residues
    Dr. Aquaguard Magna HD RO : -
    Aquaguard Reviva RO : -
    WAW35RW2RP : Able to reduce the pesticide residues
    Aquaguard Enhance RO : -
    • In India, high concentrations of both organochlorine and organophosphorous pesticides have been found in surface and ground water samples. Reverse-osmosis water filters are expected to remove pesticide residues.
    • We tested the 10 brands for pesticide residues. They were all able to reduce the pesticide residues and scored equally well.
    General Qualities
    Pureit Marvella RO : 3.2
    Dr. Aquaguard Magna HD RO : -
    Aquaguard Reviva RO : -
    WAW35RW2RP : 3.76
    Aquaguard Enhance RO : -
    Water-storage capacity should be as declared by the manufacturer.
    • In five brands – Tata Swach, Electrolux, Usha, Aquaguard and Pureit – the water-storage capacity was found to be less than the declared.
    Pureit Marvella RO : 5
    Dr. Aquaguard Magna HD RO : -
    Aquaguard Reviva RO : -
    WAW35RW2RP : 5
    Aquaguard Enhance RO : -
    All the brands scored equally well.
    Pureit Marvella RO : 2.4
    Dr. Aquaguard Magna HD RO : -
    Aquaguard Reviva RO : -
    WAW35RW2RP : 1.95
    Aquaguard Enhance RO : -
    It is the quantity of output water released from the system in a particular time period. Production rate should not be less than five litres per hour.
    Pureit Marvella RO : 3.4
    Dr. Aquaguard Magna HD RO : -
    Aquaguard Reviva RO : -
    WAW35RW2RP : 3.8
    Aquaguard Enhance RO : -
    Overall, the workmanship and finish ranged from good to very good.
    Pureit Marvella RO : 3
    Dr. Aquaguard Magna HD RO : -
    Aquaguard Reviva RO : -
    WAW35RW2RP : 3
    Aquaguard Enhance RO : -
    As per BIS requirement, a nameplate shall be fixed on the body of the RO system at a prominent location. The nameplate shall be marked with these details:
    • Name of manufacturer
    • Brand name
    • Production serial number
    • Model name or code
    • Production rate in l/h
    • Percent recovery of product water
    • Maximum operating TDS level
    • Supply voltage, whether single- or three-phase, frequency, volts and wattage

    The product should include these details as well: namely address of manufacturer, manufacturing date, MRP, and warning/precaution note. An instruction manual containing proper method of operation and use of the purifier shall be supplied along with the purifier. The purifier may also be marked with the Standard mark.

    All the brands had provided the required information

    Pureit Marvella RO : 2
    Dr. Aquaguard Magna HD RO : -
    Aquaguard Reviva RO : -
    WAW35RW2RP : 2
    Aquaguard Enhance RO : -
    As per the national standard, packing of RO purifier shall be sufficiently robust to give adequate protection from transportation damage. Being made from plastic material, the product has delicate assemblies and housing.
    • All the water purifiers were packed in thick, laminated paperboard carton supported by good-quality thermocol to give protection from damage.
    Pureit Marvella RO : 2
    Dr. Aquaguard Magna HD RO : -
    Aquaguard Reviva RO : -
    WAW35RW2RP : 2
    Aquaguard Enhance RO : -
    A user’s manual for proper method of operation and use of the RO system shall be supplied along with the product. It shall also include details on the life and specification of all the filters/ consumables.
    • In the case of Aquaguard, no manual was provided with the unit.


    Guides and Tips

    Reverse osmosis is the key principle behind RO water purifiers. Water from higher TDS (total dissolved solids) level – that is, very hard water – is transferred to the lower TDS level through a filtering membrane. RO technology uses high pressure to push water through an extremely fine filter or membrane. The holes in this membrane are as small as .0001 microns. They remove dissolved salts along with pollutants and other physical contaminants including virus, and harmful metals, minerals, bacteria and microorganisms. Most of the RO purifiers also comprise of TDS controllers (to adjust the TDS level). The filter is kept clean by flushing the separated contaminants so they drain away.

    In the quest to live healthier lives, many people have turned to water filters. Some water filters fit into pitchers to provide clean drinking water. Some filters attach to faucets and filter water as it flows out of the tap, and still others filter water as it enters a house so that all of the water in the home is filtered.


    What you need to know before buying a water purifier

    Water being the most vital element of our life, its purity should be accorded the highest priority by each of us. Water is our Life Line. Many diseases in the third world are either water-borne or due to contaminated water. Unlike the western countries where tap water is safe for drinking, the water that comes through taps in the developing world...

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