Item model number WD-D6RF Flow rate 0.42 gpm Material The first PP cotton layer , the activated carbon block layer, the second PP cotton layer, DOW Reverse osmosis membrane layer , and the post-activated carbon block layer Product dimensions 6.8*7.7*16.2 inches Service life 1 year What contaminants can this filter remove? • TDS, chlorine, taste and odor, chloramine, scale, turbidity. • Carcinogens: chromium (hexavalent), chromium (trivalent), cadmium and cadmium compounds, ferric oxide. • Heavy metals: lead, mercury, barium, copper, radium 226/228, aluminum. • Microorganic contaminants: cysts. • Inorganic pollutants: arsenic and inorganic arsenic compounds, fluoride. • Organic pollutants: asbestos, benzene, formaldehyde, lindane, phenytoin nitrate/nitrite bisphenol A, trichloromethane, chlordane, PFOA & PFOS, etc. How often do I need to change the filter? The FIST filter has a 1-year lifetime. Waterdrop D6 Reverse Osmosis System has filter life indicators that will remind you to replace the filter. Why does the filtered water taste funny? • The filter is about to expire. Check the indicator reminder to confirm and replace it. • The system hasn't been used for a while. Turn on the D6 faucet and allow it to flush for a while before drinking. What will happen if I do not change my filter when the filter is expired? Over-used filters will degrade the filtration performance, causing contaminants to leak back into the water and adversely affect your health. Upgraded 6-Stage Filtration, Care From The Beginning The Waterdrop D6 under sink reverse osmosis system is upgraded to 6-stage filtration with a filtration accuracy of 0.0001μm. It can reduce 1,000+ kinds of harmful substances in water to ensure the purity and safety of your water. Huge DOW® RO Membrane With a pore size of 0.0001 µm, this filter stands out amongst others for its great filtration and longer service life. It reduces most viruses, harmful chemicals, heavy metals, pesticides, etc. Service Life This D6 RO water filter provides you with up to 12 months or 1,000 gallons of clean water for you and your family. Easy Set-up D6 RO system is designed for DIY installation within 30 minutes. Your Purchase, Your Love At Waterdrop, we want to use Water4Smile as a platform to promote water stewardship and hopefully trigger wider industry action to make a change. We want first to achieve the vision of “Water for All.” - equal access to clean, safe and healthy drinking water for the whole society. Then raise awareness of sustainable uses of water. To reach this goal, we will continue putting effort and resources into our R&D division, and use innovation to bring fresh water that is socially equitable, environmentally sustainable and economically beneficial. [1] Information is based on Radionuclides in Drinking Water by EPA.