WATERRO OPTIMUM 400G-3013*1 Direct-Flow Reverse Osmosis System The WATERRO OPTIMUM 400G-3013*1 Direct-Flow Reverse Osmosis System is a modern direct-flow reverse osmosis system that provides a continuous supply of high-quality drinking water without a storage tank. The system is equipped with a WATERRO WR-3013-400 membrane, a PRO 400 24V booster pump and a compact Direct Flow design, ensuring fast purified water delivery while saving space under the sink. SLIM 10" pre-filters and an Inline QF 2.0" Post Carbon post-filter ensure effective water purification, excellent taste and easy filter replacement. Key advantages 400 GPD capacity Direct Flow technology without a storage tank WATERRO WR-3013-400 membrane PRO 400 24V 2.5A booster pump Standard SLIM 10" filters Inline QF 2.0" Post Carbon post-filter Compact under-sink installation 24 V power supply system