RO Vs. UV Vs. UF Water Purifier – Which One Will Be The Best Fit For Your Family And Why?

The rising water-borne diseases have prompted you to buy a water purifier, but when you go out to buy one, you find different types of it! What is – RO, UV, or Uf? what are the differences between them? and which one is the best for my family? – every other shopkeeper pushes their product, adding to the growing confusion in your head. 

If you are going through this dilemma as you search for the perfect water purifier, then you are at the right place! We shall explain what precisely the different types of water purifiers do and help you understand which one will be the best for you through this article! So let’s dive right into it-



To give you a brief overview of the key differences between the three you can refer to the table below. A more detailed distinction has been given in the following sections. 

RO Water Purifier

UV Water Purifier 

UF Water Purifier 

Needs electricity to function? Yes, yes, no.
Can kill bacteria and viruses? Yes  Yes  Yes 
Can remove the dead body of bacteria and virus? Yes,  no yes
Can remove dissolved Contaminants? Yes no no.
Can work with dirty turbid water? Yes  no Yes 
Can remove dissolved salts? Yes no no
Works with normal tap pressure? No ( requires an extra water pump to reach desired water pressure level) Yes  Yes 
Wastes water? Yes  No  no
Pricing  Most expensive  Expensive  Cheapest 


What is RO Water Purifier? Its Advantages and Disadvantages.

What is RO Water Purifier Its Advantages and Disadvantages 

RO in RO water purifier stands for reverse osmosis; if you remember your biology lessons, osmosis is the movement of water molecules from a less concentrated solution to a more concentrated one through a semi-permeable membrane. 

The Ro water purifier works on this same principle- it has a semi-permeable membrane with holes no larger than 0.0001 microns. The membrane size makes sure that only water molecules can pass through; hence when water passes through it, all the contaminants remain back, giving you clean water!

Advantages of RO Water Purifier-  

  • A Ro water purifier can distill out all contaminants from the water, dead or alive.
  • It comes with a storage tank, so you don’t have to worry about where to store the clean drinking water.
  • It comes with an air pressure system that automatically cleans the funnel, bringing down the frequency of maintenance checks.


Disadvantages of RO Water Purifier-

  • Ro water purifiers need electricity to work; hence, if you live in an area with frequent electricity cuts, this might not seem viable.
  • It is notorious for rejecting high amounts of water; if you put about three liters of water, you will get one liter of clean water and two liters of dirty water which unfortunately gets wasted; hence it is not sustainable, but you can minimize this wastage by utilizing the wastewater for other chores like cleaning the toilets, mopping the floors, etc. 
  • The maintenance costs of Ro water purifiers are high. 


What is UV Water Purifier? Its Advantages and Disadvantages 

What is UV Water Purifier Its Advantages and Disadvantages 

UV water purifiers or Ultraviolet Water Purifiers are a type of water purifiers that use UV rays to clean water. 

In this, water is made to pass through a chamber that has a UV lamp attached. This lamp emits UV radiation which kills out the pathogens present in the water by attacking their DNA; this renders them dead and unable to reproduce hence giving you clean, sterile water.

Advantages of UV Water Purifier-  

  • UV water purifiers are very easy to install and use, as it doesn’t require any manual intervention and has completely automatic functioning, making its usage fuss-free!
  • It has a low operating cost and is energy efficient; hence it will not add much to your electricity bill.
  • It is fast and provides you with clean drinking water in no time; it also does not change the taste of the water, so if you are someone who is very specific about water taste, this might suit your requirements.


 Disadvantages of UV Water Purifier-

  • UV water purifiers cannot remove dissolved impurities like arsenic, lead, pesticides, fluoride cadmium, etc. It also just kills the pathogens and does not remove them; hence the clean water will have dead bodies of the pathogen, but this does not mean water is impure.
  • It cannot work without electricity, making it an unviable option for people living in low electricity regions.
  • Physical scale deposits in quartz sleeves can interfere with the working of the Uv rays emission, hence bringing down the efficiency of the device. 


What is UF Water Purifier? Its Advantages and Disadvantages 

What is UF Water Purifier Its Advantages and Disadvantages 

UF Water purifier, an ultrafiltration water purifier, uses a semi-permeable membrane to filter out contaminants and give clean drinking water. 

In this, water is made to pass through a semi-permeable membrane at high pressure; as the water exerts a hydrostatic force on the membrane, the tiny holes present in the membrane allow the water molecules to pass while holding back the contaminants. 

This is somewhat similar to RO water purifiers as they both use a semi-permeable membrane, but an Uf water purifier is less advanced than a RO water purifier. 

Advantages of UF Water Purifier- 

  • UF water purifiers are cheaper than the other two types, as they make use of basic water filtration techniques.
  • It does not require electricity to function hence you can use it in places where electricity is low.
  • It does not weigh much and hence is portable. It also does not have wires attached as it does not require electricity. You can just pick it up and place it in new locations without worrying about installations.
  • The installation and maintenance of UF water purifiers are effortless and fuss-free; they won’t even require a technician; you can just pull it out of the box, read the instructions and assemble it yourselves!  
  • It does not waste water; hence it is environmentally friendly. 


Disadvantages of UF Water Purifier-  

  • It cannot get rid of dissolved contaminants like harmful salts and metals.



As mentioned in the sections above, RO water purifiers and Uf water purifiers work on somewhat the same principles hence might seem similar, but they are different! The below-made table will help you understand the difference between the two-

RO Water Purifiers  

UF Water Purifiers 

Needs electricity to function.  Does not need electricity to function.
Semi-permeable membrane is of 0.0001 micron Semi-permeable membrane is of 0.1 micron 
Requires high tap pressure  Works on normal tap pressure 
Can remove upto 90% of total dissolved solids (TDS) Cannot remove TDS
High water wastage  Low or no water wastage 
Expensive  Cheap 
High maintenance cost Low maintenance cost 


Which Filter is the Best for My Home?

Which Filter is the Best for My Home

When given a choice, you should go for a water purifier that has a mix of all three filters, as it will help you attain the safest drinking water! but finding that can prove hard hence you should prefer the water purifiers in this order – 

  1. RO Water purifier
  2. UV Water Purifier
  3. UF Water Purifier 

But while choosing the best one, you should also look for another element that is – TDS. 

TDS or Total Dissolved Solids are the inorganic salts and organic solutions present in the water. TDS in itself does not harm your family, but it is known as slow poison as drinking water with TDS will affect your health slowly. Also present in your water are bacteria and turbidity; hence Below mentioned is a table to help you decide the water purifier that will suit you best according to the TDS levels, bacteria, and turbidity in your water-

TDS Level 

Turbid Water 


Ideal water Purifier 

Below 300 PPM  no yes UV water Purifier
Below 300 PPM  Yes  Yes  UV + UF Water Purifier 
Above 300 PPM  no no RO Water Purifier  + TDS controller 
Above 300 PPM  yes yes RO+UV+UF Water Purifier  + TDS controller.

Authors note– If the water that comes to your house is turbid and dirty it is best to go for a RO water purifier.



1. Are all TDS bad?

No, TDS also includes essential minerals and salts which are required by your body to keep it healthy. Not all Forms of TDS are harmful, but an optimum amount of the good parts is necessary for your diet.


2. Is RO Banned in India?

The answer depends on your TDS levels, and It has not been banned all over India. Under the NGT’S guidelines, the government of India has prohibited the installation of RO water purifiers in places where the TDS of water is less than 500 mg/liter. This has been done because Ro purifier-generated water is stripped of its minerals, which can harm your health.


Also Read:

How to Choose a Water Purifier?

Best Water Purifier under 15000 in India

Best Gravity Based Water Purifier in India



While choosing a water filter, it is best to look for one with all the three RO, UV, and UF technologies in it, as with this, you can rest assured that you are getting the safest drinking water! But if you cannot find it for some reason, you should go for a RO one as that will be the second-best option. 

Tell us in the comments below which point you found the most useful!

Leave a Comment