Drinking Safe and Pure Water Makes you healthier and it also suppresses appetite.

There are many health benefits of Drinking the pure water.

RO vs UV

It is very important to choose the  best Water Purifier since there are a lot of harmful particles like bacteria, lead, artificial chemicals, pesticides that are present in Both Well water as well as Metropolitan Water Supplies.

Reverse Osmosis Purifier (RO), Ultraviolet Rays Purifier (UV), Ultrafiltration (UF) are the three most important methods of purification technologies that are widely used in India and all of them have Pros and Cons as well.

After you know the difference between the Ro, UV, and UF Water Purification system, you can select the Best Water Purifier that is suitable for you.

Before you select any water purifier, you have to know the basic terminologies like TDS. In the previous post, I had covered the TDS (Total Dissolved Solids).

Difference Between RO UV UF Water Purifiers

RO Water PurifierUV Water PurifierUF Water Purifier
Requires Electricity to operateRequires Electricity to operateNo Electricity required
Kills and Removes all the Bacteria and Viruses from the Water.Kills all Bacteria and Viruses but their Dead Bodies remain in the Water.Kills and Removes all the Bacteria and Viruses from the Water.
Requires Electricity to Boost the Tap Water PressureUV Water Purifiers can work with Normal Tap Water Pressure.UF Water Purifiers can work with Normal Tap Water Pressure.
Removes the Dissolved SaltsCannot remove Dissolved SaltsCannot remove Dissolved Salts
RO Purifiers has Prefiltration system to work with the Dirty Water.Water should be clear for UV to work.Works with Dirty Turbid Water.
RO Water PurifierUV Water PurifierUF Water Purifier

The Reverse Osmosis Water Purification System or RO Water Filter Requires electricity to operate, and it can remove the Total Dissolved Solids that are present in the Water.

The RO Water Purifier also offers prefiltration in case you want to purify the Dirty Water, and the purifier removes all the virus and Germs, but it requires electricity to boost the pressure of the Tap Water.

Reverse Osmosis Requires a lot of Water, If you input 3 Liters of Water into an RO Purifier, you will Get 1 Litre of Pure Water and 2 Liters of Dirty Water.

You can make use of the Dirty Water for mopping the floor and cleaning the house.

The Domestic RO Purifiers that are available online are not capable of desalination which means they can’t convert the saline water to fresh water. Also, unbranded RO water purifiers do not retain natural minerals.

Thre are a lot of RO Water Purifiers Available online, But a Good RO filter is capable of not only removing the bad salts and hard metals but also retain the natural minerals in the water.

The UV Water Purifier also requires electricity to work, but it doesn’t need additional power to Boost the Tap Water Pressure. It can work with Normal Tap pressure.

The UV Water Purification system can kill all the Germs, bacteria and the Viruses present in the water but the dead bacteria will remain in the water.

The UV has proven to be reliable and cost-effective methods of water purification. UV technology is chemical free, and it does not change the taste and the color of the water.

On the top of all these features, the UV systems are compact and can be easily maintained.

The Ultrafiltration, which is termed as UF, is another water purification system that works without electricity and completely kills and removes all the Bacteria, Viruses and other microorganisms from the water.

Unlike the UV Water Purifier, the UF purifier removes all the germs and dead bacteria from the water after killing them.

The UF Water purifier doesn’t require electricity since it doesn’t require Tap water pressure and works well with the regular pipe water pressure.

The only lag about the UF water purifier is that it will not remove the Dissolved solids in the water. So, you can use the UF purifier only when you are sure about the Level of the Dissolved solids in the water.

You need an RO Water purification system when the Water contains a lot of Dissolved Salts. Also, If you don’t know about the TDS levels in the water, it is good to opt for a Reverse Osmosis Water Purifier.

RO vs UV

Ultra Violet Purification: How it differs from RO?

The RO process takes care of the major aspects of purification. However, traces of contaminants like certain germs, bacteria, and microorganisms sneak through the RO filters.

These germs can cause dangerous diseases like typhoid, dysentery, and diarrhea. The UV purification system comes to the rescue by elimination such dangerous bacteria from the RO purified water.

The biggest disadvantage of the RO water purifying system is that it wastes a lot of water depending on the concentration of the impurities.

On an average, you have 1 part of pure water to every 2-3 parts of reject water. This can be a criminal waste considering the fact that there is an extreme shortage of water resources.

Ultraviolet filters do not waste any water. They do not use chemicals to purify water thereby ensuring they maintain the taste of water.

The UV filters do not require as much maintenance as the RO filters do. However, the UV filters are not capable of removing salts, nitrates, fluorides, and heavy metal impurities like arsenic and lead.

RO vs UV vs UF

Ultrafiltration – How is it different from RO and UV?

Ultrafiltration process does not require any electricity to operate. The UF membranes have slightly larger pores as compared to the RO membrane filters. They can take care of bacteria, viruses, and germs, but are ineffective in eliminating TDS.

The advantage of UF is that it does not require much maintenance and the filters have the capacity to last long. These filters are not efficient in handling heavy metals and water with high TDS levels.

UF differs from UV in the sense that it does not make use of ultraviolet radiation to remove impurities.

Final Words – Wrapping it up

Every type of water filter, RO or otherwise has some negative aspects. A combination of RO, UV, and UF along with TDS controllers is the best one for every Indian home. Ensure to have this combination in the water purifier you select.

Now you know the Difference Between RO – UV – UF Water Purifiers. If you have any queries regarding the water purification systems, post them in the comments section below, and I’ll be Glad to answer them 🙂

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Maximum purifier have RO+UV is it ok or we required uf also . I m in dehradun and municipal water tds is around 300

Kitchenarena Team

For TDS 300ppm, RO is not required. Only UV/UF is enough.

MANOJ kumar Meher

We are drinking phd supply water
so which purifier is best for us RO or UV?


Alkaline ro is better or normal ro. Can we prefer ro and uv with out uf and tds

Kitchenarena Team

Alkaline and Reverse Osmosis are two different methods of water purification. There is no water purifier model that comes with both the RO and Alkaline Purification process. In fact, Alkaline water purifier models are not much available in India. Depending on the TDS levels in your water, you have to opt for an RO or normal UV/UF water purifier. Also, it is better to buy an RO that comes with a TDS Controller or Mineralizer.


TDS of water is 175,so for water purifier RO is required or not..only UV is enough?

Kitchenarena Team

TDS 175 is good. RO is not required, you can install an UV/UF water purifier like Kent Maxx.


hi sir ,

i have been looking out for a new water purifier for my home .

the water which is supplied is from municipality.

so i am thinking to buy uv + uf water purifier .

my budget is 13,000 rs

i m bit confused about which brands should i choose

kent, aquaguard or livpure.

as uv+uf technology doesn’t require much maintenance .

planning to use it for the next 10 years .

can u also suggest some good models

hope to get an answer from you soon and thanks in advance.

Kitchenarena Team

What are the TDS levels in your water source? As you mentioned that you get water from the municipality, the TDS levels will be generally good, so UV + UF water purifier will do the job. But, if you are planning to use the water purifier with borewell water, RO technology is required to purify the water.

Checkout the below uv uf models

Kent Maxx 7 L UV + UF Water Purifier (Amazon Link – http://amzn.to/2ddbmS1)
Aquaguard Superb 6.5-Litre UV + UF (Amazon Link – http://amzn.to/2y3QWmW)


in my society the water is supplied through only municipalty. there is no borewater. but only on few occassion water tanker is called . i am planning to buy kent maxx as suggested by you. thanks for the reply.


We have Aquauard Enhance UV +RO plant. Water supply is from tubewell , with TDS of around 600. We want to remove/ bypass RO unit / tube.

Is it ok to have unit without RO unit ?


I am in Chennai near the coast. TDS is close to 1800 and the water is slightly salty to taste. Will RO work for me.


Hi Shiva,

I am from Rajasthan. In RO based water purifiers a lot of water is wasted. Does the same holds true for UV/UF combined water purifiers as well. Thanks.



Your blog is confusing.

You mentioned

-RO can reduce TDS and also kill and remove germs, bacteria, virus.

-UV kill germs, bacteria, virus (using electricity) Donot remove these dead bodies plus cannot reduce TDS.

-UF kill and remove germs,bacteria, virus. Donot reduce TDS.

1) So if I have high TDS (more than 200) it’s mandatory to use RO. Then why you suggesting to use UV-UF even though RO is doing all??

2) Why are all big brands combining RO, UV,UF together in one product when each of these are doing same task??

3) What is TDS adjuster?? Information I have is companies mix small amount of untreated water in treated to increase TDS level in final water output?? Do you have some insight how it works??

4) With high density membrane water purifiers RO based reduce TDS by90-95%. Then how can they adjust TDS??

Kitchenarena Team

If the TDS levels are more than 300ppm, you should opt for an RO water purifiers. Most of the RO water purifiers come with UV/UF combination for additional purification, to ensure the water is 99% free from germs. Please read the below posts to know more about TDS Controllers and Mineralizers.



I have couple of questions after reading your Article and the posted questions, the basic premise being that the quality and contents of Water keeps on changing from day to day and we CANNOT control it:

1. Why does UV/UF used with a Slash?

2.Do we need only one of these or both?

3.Does any System have both?

4.If one has to choose between UV and UF, which one is better assuming normal Corporation Water which we all know how good or bad it is?


Kitchenarena Team

Most of the RO water purifiers are equipped either with UV or with UF chambers for additional purification. Now, most of the models come with the combination RO + UV + UF technologies to ensure that the water is 99% free from bacteria and virus. Have a look at the below models that with RO UV UF Combination.

Kent Grand Plus (Amazon Link – http://amzn.to/2vNuihO)

Livpure Pep Pro++ (Amazon link – http://amzn.to/2fqNER3)



can you provide the detailed digrame of parts used in aquaguard uv+uf. so that i can myself service the same and if needed replace the parts.

thanks in anticipation.



The TDS of our boring water is 560 mg/ltr.Which is the best purifier(Ro/UV/UF) to use without affecting the required/essential minerals?And what should be the TDS of a healthy water?

Kitchenarena Team

If the TDS of the water is above 400ppm, you have to opt for an RO water purifier that comes with a TDS Controller/Mineralizer. Now, most of the RO water purifiers come with UV/UF combination for providing additional safety. Check out these posts to know more about TDS



Is whirpool Minerala 90 Platinum RO Water Purifier – 8.5 L (8.5 Ltr) filter good? We have Pune corporation water.

What will be the maintenance of RO water purifier.

Thanks in advance for your help!

Kitchenarena Team

The water purifier you have mentioned is good and is suitable for water having TDS levels up to 2000ppm. The maintenance cost will be around Rs.3000 – 4000 for most of the RO water purifier models. It is better to check the TDS level in your water source as you get corporation the TDS levels might be already good. If the TDS levels are low, you can simply opt for a UV UF water purifier.


Hi, Your blog is so informative. I’m from Hyderabad and the water we use is of tds level around 320 to 350 and it’s not salty and clear municipal water. Please suggest me, Can I use Aquaguard Crystal Plus UV water purifier.

Thank you,

Kitchenarena Team

Aquaguard Crystal Plus UV is the right choice for you as the TDS levels in your water are good. But, this Aquaguard model does not have a storage tank. In case of power cut, you won’t get water. You can also have a look at Kent Maxx UV that comes with a 7-litre storage tank.


what is ur opinion about Pureit Advanced (RO + MF) 5 L RO + MF Water Purifier (White)
and kindly helpo me to understand MF .


Kitchenarena Team

Most of the reverse osmosis water purifiers are equipped with either UV/UF or MF for backup purpose and to make sure that the water is 100% free from the contaminants.

Also, these RO water purifier comes with a TDS controller and a little bit of water is directly sent through the UV or UF chamber to maintain the natural minerals in the water.

MF means microfiltration which is similar to the ultrafiltration.


Hi , does UF filter has any use of it , if the water first passed through RO first and then to UF filter

Biswajit Parida

Our drinking water has TDS of around 350 mg/L, but the hardness is little bit high, as evidenced from the settling in the boiled water and also from the scaling on buckets and taps in the bathroom. Which type of water purifier should be used?

Kitchenarena Team

In such condition, you have to opt for an RO water purifier that comes with a TDS Controller or Mineralizer. We have listed the Popular models in this post. Please have a look (https://www.kitchenarena.in/best-water-purifiers-india/)


In a combo of RO and UV does it mean that we can select one of the two to use simultaneously or whether the purifier will itself use both together? Also, I have borewell water at home so which is the best one suited?

Kitchenarena Team

Both RO and UV will work together. First, the water passes through the RO which eliminates hard metals and most of the bacterium form the water. Then the water passes through the UV chamber for additional purification, just to ensure that the water is 100% free from contaminants. For borewell water, it is better to go with a RO + UV water purifier like Kent Grand Plus, Kent ACE Mineral, Livpure Glo.


Sir minimum and higher range of tds for drinking water

Kitchenarena Team

Please have a look at this article: https://www.kitchenarena.in/total-dissolved-solids/


Hi i am looking for water purifier and in my area water is hard and we also use boring water.. My son falls sick frequently.. What type of ro we shud go for.

Kitchenarena Team

Hi There, If your water source is Hard, you have to go for an RO water purifier that removes the hard metals and salts from the water. It is better to take your water sample to a lab and check the TDS levels and if there any presence of harmful salts in the water. If the TDS level is high and not much harmful metals in the water then you can go with an RO water purifier that comes with a TDS Controller (EX: Kent Grand Plus, Kent ACE Mineral, Livepure RO) If there is presence of a harmful substance in the water, then you can go with an RO water purifier that offers 100% RO water purification + Mineralizer (100% water passes through RO Membrane and Minerals will be added at the end EX: LG RO water purifiers)