7-STAGE FILTRATION: The Tappwater Reverse Osmosis Countertop water purifier combines sediments & carbon filters, a high-performance reverse osmosis membrane and carbon post-filters for the best taste and water cleanliness SWEDISH MINERAL ROCK: Infused with essential minerals like calcium and magnesium, the Swedish Mineral Rock elevates your water, supporting balance, vitality and refined hydration. ENERGY EFFICIENT: The countertop water purification unit has a 3:1 pure-to-waste ratio making it one of the most efficient reverse osmosis water filters. HIGH FLOW RATE: The Tappwater countertop RO system has a high flow rate of 2L/min from the pure water tank. SIMPLE SET-UP: Fuss-free installation, simply insert the water filter cartridge and follow the steps to rinse the syste. No plumbing required.