Published Jul 28, 2025 · 4 Min Read

Overview of the types of water purifiers

Water purifiers use various advanced technologies to ensure your drinking water is clean and pure. Common types include Reverse Osmosis (RO), Ultraviolet (UV), Ultrafiltration (UF), and gravity purifiers. Each works to remove different contaminants, from dissolved solids to bacteria. This ensures you gain access to safe, clean, and healthy water.


Getting a new water purifier is now budget-friendly. Simply browse the selection of water purifiers on Bajaj Mall. Alternatively, visit any of Bajaj Finserv’s 1.5 lakh partner stores in 4,000 cities in India. Choose the product that you like and get Easy EMI and zero down payment offers exclusively with Bajaj Finserv’s financing options. Check your loan eligibility and convert the cost of your new water purifier into Easy EMIs.

RO, UV, UF, and gravity purifiers explained

CriterionReverse Osmosis (RO)Ultraviolet (UV)Ultrafiltration (UF)Gravity purifier
MechanismWater forced through a fine semi-permeable membrane.UV lamp kills bacteria and viruses.Water passes through a hollow fibre membrane.Multi-stage filters, water flows by gravity.
Contaminants removedTotal dissolved solids, heavy metals, chemicals, microbes.Bacteria, viruses, other microorganisms.Bacteria, cysts, suspended solids, turbidity.Sediment, turbidity, some chemicals, some microbes.
Requires electricityYesYesNoNo
Best suited forHigh TDS water, varied contamination.Low TDS water, microbiological contamination.Low TDS water, turbid water.Low TDS water, areas with no power.
Key benefitComprehensive impurity removal.Chemical-free microbial disinfection.Removes larger pathogens without electricity.Affordable, portable, no electricity needed.

Smart shopping starts here: Explore exclusive offers and pair them with affordable Easy EMIs for a rewarding shopping experience.

Which type of water purifier is best for your water

Your water's characteristicRecommended purifier typeKey reason/benefitCost consideration
High Total Dissolved Solids (TDS)Reverse Osmosis (RO)It comprehensively removes dissolved impurities and chemicals.High
Microbiological contaminationUltraviolet (UV)It effectively deactivates bacteria and viruses without chemicals.Moderate
Turbidity, sediment, bacteria, cystsUltrafiltration (UF)It removes suspended solids and larger microbes without electricity.Low to moderate
Basic filtration (rural/no Power)Gravity purifierIt provides essential filtration without electricity.Low

Pros and cons of each type of water purifier

Purifier typeProsCons
Reverse Osmosis (RO)Offers comprehensive removal of TDS, chemicals, and microbes.Wastes water, removes minerals, requires electricity, higher cost.
Ultraviolet (UV)Provides chemical-free microbial disinfection; retains minerals.Does not remove TDS or chemicals; requires electricity.
Ultrafiltration (UF)Removes bacteria, cysts, and suspended solids without electricity.Does not remove TDS, chemicals, or viruses; flow can be slow.
Gravity purifierAffordable, portable, and requires no electricity for basic filtration.Does not remove TDS, viruses, or chemicals; offers slow flow rates.

Which water purifier type is best for you?

Choosing the best water purifier depends entirely on your specific water quality.

  • For high Total Dissolved Solids (TDS) or chemical contamination, a Reverse Osmosis (RO) system proves most effective.
  • Consider Ultraviolet (UV) or Ultrafiltration (UF) purifiers for microbiological concerns.
  • If electricity is unreliable or your budget is tight, non-electric UF or gravity purifiers offer solutions.
  • Always test your water first for an informed decision.

Looking to buy a water purifier on Easy EMIs? Use the store locator to find our partner stores.

Get your water purifier on Easy EMIs with Bajaj Finserv

Bringing home a new water purifier is now hassle-free with Bajaj Finserv’s flexible financing options. Follow these simple steps to buy your preferred water purifier on Easy EMIs:

  • Explore models on Bajaj Mall: Browse through a wide selection of water purifiers on Bajaj Mall. Compare different models and their features to find the one that meets your needs.
  • Visit a partner store: Once you have shortlisted a model, head to any of Bajaj Finserv’s 1.5 lakh partner stores across 4,000 Indian cities. View the product in person and take expert help if needed before making a final decision.
  • Choose the Easy EMI Loan option: At checkout, opt for the Bajaj Finserv Easy EMI Loan. Get financing of up to Rs. 5 lakh and convert your purchase into affordable EMIs. Select models may also be available with zero down payment.
  • Check your loan eligibility online: To make the process smoother, check your pre-approved loan limit online by entering your mobile number and OTP. This gives you clarity on how much you can borrow before visiting the store.
  • Use the EMI Network Card for purchases up to Rs. 3 lakh: If you own the Bajaj Finserv EMI Network Card, use it to split payments of up to Rs. 3 lakh into monthly instalments—no paperwork, no delays.

FAQs

Can I buy a water purifier on EMIs?

Yes, you can purchase a water purifier with Bajaj Finserv’s Easy EMI options. 

If you are an existing user of the Bajaj Finserv Insta EMI Card: 

  • Explore a wide range of water purifiers on Bajaj Mall
  • Choose the preferred model and visit a Bajaj Finserv partner store to check it out in person
  • Use your EMI Network Card and avail of Easy EMIs for affordable monthly payments
  • Enjoy your new water purifier on Easy EMIs

If you do not have one, there is no need to worry. Check your Insta EMI Card eligibility and take the first step towards enjoying the affordability and convenience of Easy EMIs.

What are the different types of water purifiers?

Water purifiers use various advanced technologies. Common types include Reverse Osmosis (RO), Ultraviolet (UV), Ultrafiltration (UF), and gravity purifiers. Each works to remove different contaminants, from dissolved solids to bacteria, ensuring you gain access to safe, clean, and healthy water for your home.

Which type of water purifier is best for hard water?

For hard water, which typically has high Total Dissolved Solids (TDS), a Reverse Osmosis (RO) purifier is best. RO effectively removes dissolved salts and minerals responsible for hardness. This process ensures the water becomes softer and safer for consumption, protecting your health and appliances.

What is the difference between RO and UV?

RO (Reverse Osmosis) purifies water by forcing it through a semi-permeable membrane, removing dissolved solids, chemicals, and microbes. UV (Ultraviolet) purification deactivates bacteria and viruses using UV light, but it does not remove dissolved impurities or sediment. RO offers broader purification than UV.

Are gravity purifiers good for urban areas?

Gravity purifiers are generally less ideal for typical urban areas. Urban water often contains dissolved chemicals and varying TDS levels that gravity purifiers cannot remove. They are better suited for areas with less complex contamination and unreliable electricity, where basic filtration is sufficient.

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