<p>1. Why does the Waterdrop filter cost more than other filters?</p> <p>Because Waterdrop employs advanced materials and invests in the improvement of product quality. Moreover, our researchers invest time, employ advanced technology, and carry out various professional tests to develop products. Our reverse osmosis membrane has an accuracy of 0.0001 μm and can filter out 1,000+ invisible hazardous substances in tap water. Waterdrop continuously improves product quality to meet all consumer needs.</p> <p>2. What are the filtration stages? What are their functions?</p> <p>CF Filter</p> <p>First sediment PP membrane: Removes rust, sediment, suspended solids, and other large particles.</p> <p>Premium activated carbon block: Removes chlorine, organic matter, taste and odor.</p> <p>MRO Filter</p> <p>Second sediment PP membrane: Removes rust, sediment, suspended solids, and other large particles.</p> <p>0.0001-micron high-precision reverse osmosis membrane: Reduces TDS, lead, salt, atrazine, fluoride, nitrates, PFAS, etc.</p> <p>Post activated carbon block: Removes taste and odor and improves the taste of water.</p> <p>PET pleated membrane: Further filters out large particles.</p> <p>3. How often do I need to change the filter?</p> <p>CF filter: 12 months or 1,100 gallons, whichever comes first. This may vary depending on filtered water consumption.</p> <p>MRO filter: 24 months or 3,300 gallons, whichever comes first. This may vary depending on filtered water consumption.</p> <p>4. Where can I buy a replacement filter?</p> <p>Search "Waterdrop WD-G2P600-W", or contact Waterdrop customer service.</p> <p>5. How do I install the filter?</p> <p>Along with a well-organized instruction manual, you can find a step-by-step installation video on the Waterdrop YouTube channel. If you have any questions, contact Waterdrop customer service.</p>