Best Ro Water Purifier in Delhi Best Water Purifier Buying Guide. Top 5 Best Water Purifier Reviews. #1 Aquaguard Geneus RO + UV +UF 7L Water Purifier. #2 Kent Grand RO + UV 8L Water Purifier. #3 Tata Swach Viva Silver UV + UF 6 L Water Purifier. #4 Aquaguard Enhance RO 7L Water Purifier. #5 Pureit Classic 14 L Gravity Water Purifier. Final Words. KK Ro Services Water Purifier - An infographic by the team at Best Water Purifiers in Delhi. We all know that ... The UF water purifier is as good as RO water purifiers when used with public or Municipal supply water. Which water purifier is the best for Delhi? In my opinion, Aquafresh water purifier is the best for Delhi.