RO vs UV vs UF vs MF – The Only Information You Will Ever Need
Planning to buy a new water purifier for your home? Confused about all the technical terms?
You are not alone.
Most brands suffer from ‘I am the best’ syndrome and they focus more on marketing than providing actionable information.
This has given birth to all the confusion that you have in your mind right now.
Now that you have done all the hard work of landing on this page, let us do the rest.
This post will explain the difference between RO, UV, UF, and MF in simple terms.
Choosing the right water purifier for your home is extremely important in order to ensure good health. And the first step in choosing the right purifier is understanding the quality of water and selecting the suitable water purification technology.
We’ve already covered a detailed guide on how to choose the right water purifier for your home.
In this previous post, we’ve covered detailed information on identifying commonly found impurities in water and mapping the right water purification technologies according to the water quality.
This post will try to explain all the common water purification technologies like RO (Reverse Osmosis, UV (Ultraviolet), UF (Ultra Filtration), and MF (Micro Filtration), and the difference between them.
Knowing the difference between the RO, UV, UF, and MF water purification technologies will further help you in choosing the best water purifier that is most suitable for your home or office.
Another popular terminology used with water purifiers is TDS, you can learn all about the TDS level of water in our previous post.
What is the Full Form of RO UV UF and MF
- RO Full Form – Reverse Osmosis
- UV Full Form – Ultraviolet
- UF Full Form – Ultra Filtration
- MF Full Form – Micro Filtration
RO vs UV vs UF vs MF – Difference Between the Main Water Purification Technologies
| RO Purification | UV Purification | UF Purification | MF Purification |
|---|---|---|---|
| Needs electricity for purification | Needs electricity for purification | Does not need electricity | Does not need electricity |
| Filters out all the Bacteria and Viruses from the Water | Kills all bacteria and viruses but their dead bodies remain in the water | Filters out all the Bacteria and Viruses from the Water | Filters out only bacteria |
| Requires high water pressure. Therefore an extra water pump is used in all RO purifiers | Works with Normal Tap Water Pressure | Works with Normal Tap Water Pressure | Works with Normal Tap Water Pressure |
| Removes dissolved salts and harmful heavy metals | Cannot remove dissolved salts harmful heavy metals | Cannot remove dissolved salts harmful heavy metals | Cannot remove dissolved salts harmful heavy metals |
| Filters out all the suspended and visible impurities like mud, rust, dirt, sand etc. | No filtering | Filters out all the suspended and visible impurities like mud, rust, dirt, sand etc. | Filters out all the suspended and visible impurities like mud, rust, dirt, sand etc. |
| Size of membrane: 0.0001 Micron | No membrane | Size of membrane: 0.01 Micron | Size of membrane: 0.1 Micron |
| 90% TDS reduction | 0% TDS reduction | 0% TDS reduction | 0% TDS reduction |
| Wastes a lot of water | No wastage of water | No wastage of water | No wastage of water |
The below image visually depicts the filtration/purification characteristics and capabilities of MF, UF, and RO membranes.
Looking at the image above, one would naturally think, if RO alone can remove all impurities then what is the need of other purification methods like UV, UF, and MF?
We will get to this in a second.
If you look at the comparison of purification technologies above, none of the UV, UF, or MF offer complete protection against all commonly found impurities. So, it is quite clear that none of these three purification technologies can alone provide trustworthy purification.
Now, coming back to the RO purification.
The pores of the RO membrane are extremely small (0.0001 microns) and the RO membrane is prone to damage and choking if appropriate pre-filtration is not used. This is why you see most RO purifiers using 2-4 pre-filters like a pre-sediment filter, sediment filter, Pre Carbon Filter, etc.
RO water purifiers also need appropriate post-treatment like UV column, post-carbon filter, mineralizer, etc. All these post-RO filtrations and water treatments are usually added to be 100% sure of the purification and to remove any organic and inorganic impurities still left in the water. RO membrane can also change the taste of water and make it taste bitter and unnatural. Because of this post-RO activated carbon filters, a taste enhancer, or mineralizer cartridges are used.
So what we are trying to bring out here is, for reliable purification and pure water what is needed is a combination of multiple purification technologies.
We would not like to unnecessarily stretch this post long and would like to end with our final thoughts with this.
Final Thoughts
It is not advisable to rely on any single purification technology as every purification technology has its pros and cons. What is needed is a multi-stage purification approach that uses multiple purification methods.
That is why we recommend water purifiers that feature a combination of RO, UV, UF with a TDS controller/modulator or Mineralizer. These water purifiers are suitable for most Indian homes.
Hope you found this detailed explanation, of the difference Between RO, UV, UF, and MF water purifiers, useful.
If you still have any queries or would need some more information then please post them in the comments section below, and we’ll be happy to answer 🙂
In my home we are using Borwell water and the TDS level is 152 ppm, but the taste of water feel too hard. Kindly advise, which purifier is better (RO vs UV vs UF vs MF) ?
The ideal water purifier for your home is RO+UV+Mineralizer or RO+UV+UF+Mineralizer.
I’ve to change my rented homes often. Does any brand facilitates to switch off RO & use only UV+UF as per the need, i.e. as per the supply water in that particular building ?
Thx for the post!
-Varun
I want to buy a purifier having RO+UF of the Pureit brand. Is it ok?
Yes, HUL Pureit is a renowned water purifier brand in India.
I wish to buy pureit brand RO+MF, is it ok? Can’t see any RO+UF unit.
At present, there is no brand or water purifier that comes with such a feature to turn off RO purification as per need.
Which purifier is better for household having a municipal water supply with TDS level of up to 200 ppm. UV or UF+UV which will be better on the above scenario?
I have got ro+uv+if filter or Eureka Forbes but the taste of filtered water is somehow acidic, what should I do to reduce the acidic taste.
Please check the TDS and pH level of the purified water. Water generally tastes acidic when the TDS and pH levels are low.
UV+UF water purifier will be an ideal choice for your home.
My water TDS was 450 – 550, how can I choose water purifier.
1.RO + MC
2.RO + UV
Which is best for my water in
RO+UV would be a good choice.
Which is Better to choose, details mentioned below:
Penta RO +UV +TDS Vs Hindustan Uniliver Classic Nxt RO + MF
So if a water purifier has an ultraviolet filter with mineralizer. Is it good enough or there should be ultrafiltration at the end?
Mineralizer or TDS controller is required in RO purifiers only. Non-RO purifiers do not require mineralizer. If the TDS level of the incoming water is low and the water does not contain heavy metals like lead, arsenic etc., then you can choose a UV + UF water purifier.
Reverse osmosis water filtration systems have become very prominent in a manner that it has become synonymous with water purifier systems. Many people fail to realize that Ro system is a type of water purifier and they are of the common misconception that all water purifier is basically equipped with Ro purifier technology.