Waterdrop Water Filtration System Features A Sip of Nature Doesn't Cost Much The remineralization filter can connect to all types of under sink water filter systems. By adding one filter, you can enjoy remineralization water with a refreshing taste. Please click here to purchase this add-on filter. Easy to Install & Replace Waterdrop G3P600 RO system can be installed in 30 minutes, and the filter can be changed in just 2 seconds. There's no need to move the system, nor is there a need for tools. Tankless Design With the tankless design, it can effectively avoid secondary contamination of bacteria while freeing up 70% of under sink space. Less Expenditure, Better Choice Because of its 2:1 pure to drain ratio, this tankless reverse osmosis system can produce two cups of purified water while producing only one cup of wastewater. This helps you save money on your water bills in some way.