SimPure T1-400ALK 8 Stage 400GPD Under Sink Tankless RO System with RemineralizationAgainst NSF ANSI 58 Standards: SGS Test Report Can be Found Best 8 Stage Alkaline RO Water Filtration System Alkaline Water Filter: Restores Minerals and Produces a Balanced Alkalinity 400 GPD High Flow Rate 1. 5: 1 Low Pure to Drain Ratio, Much less Waste Water Tankless Design, Saving 70% of Space Under Your Sink Filter Replacement Alert & Twist in Filter Design All Filters are Pre installed