When choosing from the top 10 RO water purifiers in India, consider key features that ensure effective and convenient water purification. Look for multi-stage filtration systems combining RO, UV, and UF technologies for comprehensive purification. A TDS controller or mineral booster helps retain essential minerals while maintaining optimal taste. Consider the purifier's storage capacity, especially for larger families. Energy efficiency, a filter change indicator, and smart connectivity for monitoring performance add convenience. Compact designs or wall-mounted options save space. Additionally, prioritize trusted brands offering reliable after-sales service and maintenance support to ensure long-term performance and hassle-free usage for safe drinking water.