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Waterdrop Replacement Filters
Genuine Waterdrop replacement filters for the G3, G3P600, G3P800, G2 and A1 — sold at Waterdrop's own pricing by an authorized dealer, with free shipping and no sales tax outside Minnesota. Not sure which filter you need? Use the fit guide below the products.
Waterdrop Replacement Filters for G3, G3P600, G3P800, G2 and A1
Every filter above is the exact part number your system's filter light is asking for — no adapters, no third-party cartridges.
Which filter fits my Waterdrop system?
Waterdrop tankless RO systems use three cartridges: a CF composite pre-filter (sediment + carbon, replace about every 6 months), a CB carbon block (about 12 months), and the RO membrane (about 24 months). Match your system to the row below. Items marked “call to order” aren't stocked online — call 800-374-2143 and we'll source them.
| System | Pre-filter (6 mo) | Carbon block (12 mo) | RO membrane (24 mo) | Optional |
|---|---|---|---|---|
| G3P800 | WD-G3-N1CF | WD-G3P800-N3CB | WD-G3P800-N2RO | WD-MNR35 remineralization — call to order |
| G3P600 | WD-G3-N1CF | WD-G3-N3CB | WD-G3P600-N2RO — call to order | WD-MNR35 — call to order |
| G3 (400 GPD) | WD-G3-N1CF | WD-G3-N3CB | WD-G3-N2RO | WD-MNR35 — call to order |
| G2P600 / G2 | WD-G2CF — call to order | — | WD-G2P6MRO | WD-MNR35 — call to order |
| A1 countertop | WD-A1-CF — call to order | — | A1 RO filter — call to order | — |
When to replace
Your system's indicator light shifts from blue toward orange as a filter nears the end of its life and turns red when it's due. After installing the new cartridge, follow the reset step in your system's manual (on most Waterdrop RO models, hold the reset button for a few seconds until the light returns to blue). The lifespans above assume typical municipal water; well water or high-TDS supplies shorten the pre-filter interval.
Need the system itself? See our Waterdrop reverse osmosis systems.
