Waterdrop G-Series Filter Replacement
Waterdrop G3P800 filter replacement: CF pre-filter (WD-G3P800-CF, 6-month life, $25--$35); RO filter (WD-G3P800-RO, 12-month life, $35--$50); CB post-carbon (WD-G3P800-CB, 12-month life, $15--$25). Annual maintenance cost at standard intervals: $75--$110. Waterdrop sells filter subscription packs with 15% discount on recurring delivery. All Waterdrop G-series filters are proprietary -- standard TFC membranes from Dow FilmTec or other manufacturers do not fit the G-series composite housings. Buy Waterdrop OEM filters only to maintain system warranty and certified performance.