UF Water Purifier (Ultrafiltration) – Pros and Cons Explained!



UF (Ultrafiltration) is similar to Reverse Osmosis Water Purification process, but the UF Filters uses membranes with larger pores.

Unlike the other types of the Water Purifiers, the UF Water does not require electricity to function.

The UF Water Purifier is capable of killing all the Bacteria, Viruses, Cysts and other microorganisms from the water.

The Only problem with the UF Water Purifier is, It can’t remove the Dissolved salts from the water. Only the RO Water purifiers are capable of removing TDS from the water.

Advantages of the Ultrafiltration Water Purifier

No Electricity Required

The UF Water Purifiers doesn’t require any power to operate, and the UF Water Filters can work with Normal pipe water pressure.

As I mentioned above, the UF Water Purifier works without electricity, and you don’t have to worry when there is a Power Outage.

Gravity Based UF Water Purifier

Kills and Removes pollutants from the Water

The Ultraviolet Water Purifiers Just kills all the germs, bacteria, and viruses But their Dead Bodies remain in the water.

Unlike the UV Water Purifier, the UF Water Purifier Kills all the Germs and Actually removes them from the water and the are rinsed out to the drain when the UF water purifier is Flush Cleaned online.

So, the UF Water Purifiers are Better than the UV Water Purifiers.

Can Purify even the Dirty Muddy Water

The Ultrafiltration purifiers can even clean the Muddy or Turbid water and removes all the Germs, Cysts, Turbidity and Dirt from the water which is not possible in the UV water purifier.

The UV Water purifier can not purify the clay or turbid Water since the MUD and Dirt present in the water will guard the Germs against the UV Rays thereby making the process ineffective.

Ultrafiltration Membrane Water Purifiers are as good as the RO Water Purifiers when used with the Public Provided Tap or Pipe Water.

The Public or Municipal Supplied pipe water doesn’t contain Heavy Metals and Dissolved Salts like Arsenic, Cadmium, and Lead.

You need a Reverse Osmosis Water Purifier only when the TDS levels in the water is Very High.

Excellent Purification

Some of the Water Purifying systems employ chlorine treatment to kill the germs in the water. But, the eggs (Cysts) have a very hard shielding shell that cannot be penetrated by the Chlorine chemicals. Even if they kill the Germs, their Dead Bodies, and the active eggs are not filtered out from the water.

The Ultrafiltration purifiers remove even the extremely chlorine resistant eggs (Cysts) of Amoebic disease and Gastroenteritis parasites like Giardiasis and Cryptosporidiosis.

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Fail Safe

The Ultrafiltration Purifiers will never fail, and they do not give you impure water. Since the Membranes of the UF Water purifiers are very sturdy, they will not crack and let the contaminated water.

The Worst thing that can occur to the UF Water Purifier is the Flow can get Obstructed, but it can be easily cleaned to restore the flow of water.

More Efficient

The UV Bulb in the UV Water Purifiers will get dimmer, and the Light inside can get barred when scales are formed on the Bulb. You don’t get any warning notification, and you have to replace the Bulb manually in the Water Filter.

The UF Water Purifiers doesn’t require much Maintenance and can remain in Ideal Working state for Many Years. The Unique Manual Flushing arrangement in the Purifier will drain out all the Blocked Germs and Mud thereby Keep the UF Water Purifiers in Top condition.

Most of the UF Water Purifiers can work up to Ten Years when proper care is taken. You will not face many problems, and the UF Purifier don’t even require an electric connection to operate.

The UF Water Purifiers gives water that is better than the Boiled water. In the Boiled water, the Dirt and Dead germs, eggs will remain in the water whereas in the UF purification, the UF Membrane washes out all the Dirt, Germs, and Cysts from the water.

Cons of Ultrafiltration Water Purifier

The Only problem with the UF water purifier is, It cannot remove the Dissolved salts present in the water.

As I mentioned previously, only the RO Water Purifiers are capable of removing the Heavy Metals and Dissolved salts from the water.

So, the UF and UV Water Filtres are suggested only when you receive water from the Public or Community water supply. The UF Water purifiers also work with River, Well and Rain Harvested waters.

So, When you are using the UF Water Purification system, Make sure that the TDS levels in the water are Good, and the water is free from the Toxic elements like Arsenic, Cadmium, Lead and other toxic metals.

If you are Worried and not sure about the TDS Levels, then you should Opt for an RO Water Purifier.


  1. Whether UV +UF water filter waste water ?. If TDS level of municipal water changes from 140 to 240 , then what brand water filter is suggested? TDS of supply water is less , within 200, but TDS level of water from overhead tank is more than 200. Whether UV +UF changes the taste of water ?

    • UV + UF Water purifier does not waste water. Only RO water purifiers waste water. The TDS levels in your Municipal water and Overhead tank both are in the excellent range. The UV + UF water purifiers only remove dust, chlorine, suspended impurities, bacteria, virus, and microbes from the water. Minerals and Salts will not be removed and there is no water wastage.

      You can go with Kent Maxx UV UF or Aquaguard Aura UV water purifier.

  2. I stay in sector 57 Gurgaon. I have checked the tds level of water, it’s around 207. I’m confused whether I should buy either ro or uv or uf. As TDs level is less than 300 and I have done some research, I think ro is not required. Kindly suggest the best option of all

  3. I want a suitable water purifier which can remove the viruses …here water TDS is 300…
    Help me what should I purchase?

  4. Hi,
    i have got a Nero product RO UV UF TDS technology water filter, warranty period is over for the product. supplier is requesting for AMC in the process the engineer says they use some kind of chemicals for water purification and which need to be replaced in the due timely manner. please do let me know what kind of chemical they use and what would be the pros and cons of it.

    • I have not heard of the water purifier brand you have mentioned. For Top brand water purifiers like Kent, Aquaguard, Pureit, LG, Livepure, there will be filter change alarms that will notify you if there is a need to change the filter. As far as I know, only RO membrane, UV Bulb, UF and Activated carbon filters are replaced during the Annual Maintenance.

  5. Hi
    Need your inputs on Kangen water filters. We get municipal water of Godavari with very low tds levels- suggest me best filter.
    I also heard that we should not use RO water filters as it will remove necessary minerals. Please advise.

    • I have no idea about Kangen water filters. For Low TDS water, you can opt for UV UF water purifiers like Kent Maxx or Aquaguard Superb. Unbranded or Local RO water purifiers remove all the minerals from the water. But, Branded RO water purifiers like Kent, Aquaguard, Pureit, LG, Livpure, AO Smith, BlueStar come with a TDS Controller that retains the natural minerals in the water. Some of the top RO water purifiers also has a Mineralizer that adds natural minerals to the water post-purification. But, In your case, a simple UV UF water purifier will be good.

    • Hello,
      Kangen water is not really that effective. It’s no good, of not bad. There is no need for buying such an expensive water purifier. They claim to make your body alkaline by drinking alkaline water which is completely flase. Blood and all other systems have a mechanism known as buffer system which maintains the normal pH of the body. If you drink alkaline water, the only things that will become alkaline are : urine, sweat and saliva. The body tries to excrete the alkalinity. This is a marketing strategy and there are no studies showing that it is good. I’d rather suggest you stick to regular water purifiers which are in use since years.

      I’m a doctor if it’ll help you believe what I just wrote.

      Anuj Patel

  6. Hi Sir, firstly thanks for the very informative and detailed blog/post

    1. I live in Blr and getting kaveri water tds checked around 140ppm…Normal uv uf should suffice but taste is the problem so any alternative for taste with uv uf or for that i have to go for Ro ?

    2.If Ro then please help me decide between Livpure Liv Glo with Mineraliser and no UF on Amazon or Livpure Pep Pro Plus on flipkart with UF and no Mineraliser and extra anti scalant catridge. Please refer the descriprion of both.

    3.If i go with glo den no Uf so wat will filter the killed virus and bacteria killed by Ro and Uv and if i go with pep pro den no Mineraliser den post RO how do i get essential minerals. Very Confused

    3. DIfference between Mineraliser and Taste enhancer

    4. If i go with pep pro with UF ans 7 stage purification den will it be retaining required minerals or not post all purification

    Please help decide.

    • For Low TDS levels, UV UF is enough. You are confused between Livpure Glo and Livpure Pep Pro . If there is no Mineralizer, the TDS reduction is done only up to 90%. If the TDS levels in your water are low, don’t go with RO that does not have a TDS Controller. There will be no problem even if there is no UF. Normally, Reverse Osmosis will remove all the bacterium and dissolved salts. UV, UF is employed for additional protection.

  7. I stay in Mumbai Suburban town limits and the drinking water is Muncipal corporation Water supply normal , 24 hours supply except for two months – when it is regulated by time. Worst case for few days – Tanker supplied Well water in case of acute water shortage. Kindly let me know if an UF technology base Water purifier would be sufficient for family 5 members

    • UF water purifiers are good for Low TDS water. In Most Places, water supplied by Municipal corporation contain low TDS levels. Tank Supplied well water might have high TDS. If you are not sure about the TDS levels, It is better to opt for RO water purifier. If you are looking for a UF water purifier, check out – Kent Maxx. It comes with UV UF Combination.

      Kent Maxx

  8. Hello,
    I am using HomePure water filter which is UF based. I stay in Bangalore where the source of water is only borewells. Although HomePure boasts of a 7-stage water filtration system, I am not sure if this would be filtering the dissolved salts. Could you please advise if we need to go for an additional filtering system (RO) as an input to the HomePure water filter. Thanks.

    • UF is good for Pre-Treated water but the Ultrafiltration based water purifiers are not capable of removing the dissolved salts. RO is required when the TDS levels (level of salts) in your water source is high.


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