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Which RO Water Purifier Is Best?

RO water purifier is based on reverse osmosis technology. This technology is opposite to the pure osmosis. An RO water purifier contains a semi-permeable membrane containing several tiny pores that only allow the water to pass through it. In the RO water purifier, the separation of the water impurities occurs according to the molecular size of the water impurities.

An RO water purifier is known for removing all kinds of contamination, either heavy metals or microbial contamination. Thus the demand of the RO water purifier is comparatively high; therefore, to full fill, the market demand various organizations started manufacturing RO water purifier, which makes the selection of the RO water purifier tricky.

Top 3 Best RO Water Purifier

To resolve your issues here, we are sharing the best RO water purifier for home use. Our expert has created this list.

1. Kent Grand 8-Liters RO+UV+TDS Controller

This water purifier is based on carbon filter, RO, UV, UF, and TDS controller technology to provide safe and contamination-free water. This water purifier purifies water in a water tank with UV rays so that it remains safe form the microbial contamination. Due to these features, this water purifier is our expert choice.

Kent Grand 8-liters RO+UV+UF+ TDS Controller contains 8 liters of the water tank, which are made up of food-grade plastic. This water purifier is suitable to purify input water with TDS count between 500 to 2500 mg/liter.

Key Features Of Kent Grand 8-Liters RO+UV+UF+TDS Controller

  • This water purifier has 5 stages for water purification
  • Based on Patented RO TM technology
  • Suitable for input water containing TDS between 500 to 2500 mg/liter
  • Water tank is made up of food-grade plastic material
  • The purification capacity of the Kent Grand 8-liter RO+UV+UF+TDS Controller


  • Comes up with the trust of Kent
  • Best water purifier according for Indian condition
  • Double purification including RO and UV/UF
  • It purifies water from all source
  • The storage tank is about 8 liters


Waste lots of water during purification

2. AO Smith Z9

The AO Smith Z9 water purifier comes up with 8 water purification stages. These stages include Pre-filter, Sediment filter, Carbon block, Advance Recovery Technology, Patented side stream RO machine, Silver activated post carbon block, and SCMT (Silver Charged Membrane Technology). SCMT is better than the common filters like UF, MF, or UV water purification technology. It gives much better protection from any potential secondary microbial contamination post RO purification.

In this RO water purifier, 100% water passes through the RO membrane and is double purified by silvered charged membrane technology to provide double protection. AO Smith Z9 water purifier is suitable for those water which contains TDS up to 2000ppm. And it also recovers a large percentage of water.

Key Feature Of AO Smith Z9 Water Purifier

  • It has 8 stages for water purification
  • 2 times more water recovery as a result very less amount of water loss take place
  • Contains SCMT cartilage which is better than UV/UF cartridge
  • Suitable for water which contains TDS up to 2000ppm


  • It provides double protection from water impurities
  • Silver activated post carbon block, and silver charged membrane technology
  • Recover a high percentage of water
  • Purified water is safe to drink


This water purifier lacks the TDS controller; thus, TDS of water purified water cannot be control. Therefore, our expert at Mr service Expert recommend using when input water has TDS over 1000mg/liter

3. Havells Max 8-liters RO UV Water Purifier

This is one of the reputed brands. The RO water purifier contains double water purification technology (RO+UV) to purify water. The RO technology takes care of the TDS, bacteria, viruses, and other multiple impurities. In contrast, the UV water purification technology takes over to destroy the residual bacteria or virus to make the water 100% safe and contamination-free.

Another exciting feature of Havells Max 8-Liters RO UV Water Purifier contains a food-grade quality storage tank and an innovative design that lets you place the water purifier at the corner of your Kitchen platform or even mount it on the wall corner. 

Key Feature Of Havells Max 8-liters RO UV Water Purifier

  • This water purifier comes up with dual water purification technology such as RO and UV
  • Comes with mineralizer technology which restores the lost mineral during the purification
  • It has a storage capacity of 8 liters
  • Provides 100% safe water for drinking purpose


  • Presence of mineralization ensure recovery of lost minerals
  • Contains double purification system to provide dual protection from impurities
  • Comes with excellent designing


Requires high maintenance where the TDS level of the water is high

About The Author

Abhishek Kumar 

M.Tech (Biotechnology)