Replacement filter · ro water filter
Waterdrop G3P800 Tankless RO: replacement cartridge
The Waterdrop G3P800 Tankless RO takes 3 cartridges. Here is which part fits each stage, the current price, how often to swap it, and what it works out to per year - ~$135/yr (about 1,100 gal) on our engine's math, so you can decide before you are standing at the sink with a leak.
What it costs to keep running
- Annual filter cost
- $135/yr
- Cost per gallon
- $0.123
This is the same figure our scoring engine uses on the Waterdrop G3P800 Tankless RO scorecard, computed from each cartridge's price and rated gallons across every stage. Prices last checked 2026-06-01.
The cartridges it takes
G3-N1CF sediment + carbon composite
$29.99- Replace
- rated 550 gallons
- Price checked
- 2026-06-01
This model takes the brand cartridge; we found no confirmed generic equivalent, so buy the part that matches the number above.
G3P800-N2RO membrane
$89.97- Replace
- rated 2,200 gallons
- Price checked
- 2026-06-01
This model takes the brand cartridge; we found no confirmed generic equivalent, so buy the part that matches the number above.
G3-N3CB carbon block
$29.99- Replace
- rated 1,100 gallons
- Price checked
- 2026-06-01
This model takes the brand cartridge; we found no confirmed generic equivalent, so buy the part that matches the number above.
Reorder links are Amazon affiliate links: FilterScored earns a commission at no extra cost to you. Affiliate relationships never influence a score, which is computed by an engine from published specs and verified certifications.
Prices and part numbers are the ones we last verified from the manufacturer or a retailer listing on the dates shown; check the current price at the link before reordering. The annual figure is our engine's computation from that data, not a statement of what you will pay.
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