Waterdrop · Under-sink reverse osmosis
Waterdrop G3P800: what it removes and what it costs
The Waterdrop G3P800 is certified (NSF/ANSI 58, NSF/ANSI 53 and NSF/ANSI 42) to reduce PFAS (PFOA/PFOS), lead, chlorine, fluoride and TDS. Waterdrop also claims VOCs from lab tests that are not certification. For 2 people drinking and cooking with it, replacement filters cost about $160 a year, and it sends about 68 gallons a year to the drain.
5
certified reductions we track
13¢
filters per gallon at rated life
Price checked 2026-10-23. We may earn a commission.
What the Waterdrop G3P800 removes
"Certified" means a certifier (NSF, WQA, IAPMO or CSA) lists this exact product for that reduction claim; the listing is linked. "Brand test only" means Waterdrop cites a lab report but no certifier lists the claim. See certified vs. tested.
| Contaminant | Status | Evidence |
|---|---|---|
| PFAS | Certified | IAPMO R&T listing, NSF/ANSI 53 ("PFOA/PFOS") |
| Lead | Certified | IAPMO R&T listing, NSF/ANSI 58 ("Lead") |
| Chlorine | Certified | IAPMO R&T listing, NSF/ANSI 42 ("Chlorine") |
| Fluoride | Certified | IAPMO R&T listing, NSF/ANSI 58 ("Fluoride") |
| TDS | Certified | IAPMO R&T listing, NSF/ANSI 58 ("TDS") |
| VOCs | Brand test only | Unnamed third-party laboratory (per brand): "Heavy metals, VOCs, rust, sediments, salt (generic)" |
Not verified, either way (no certification or brand claim): Chloramine, Arsenic, Nitrate, Chromium 6, Mercury, Microplastics, Cysts, Bacteria and viruses, Iron, Copper, Uranium, 1,4-dioxane.
What it costs to run
Yearly cost = replacements per year × filter price, for each filter it uses; a filter is replaced at its gallon rating or its month limit, whichever comes first, plus the water sent to the drain at an average water and sewer price. Water use: drinking and cooking water (0.28 gallons per person a day, EPA's average adult intake).
| Household | Gallons a year | Filters a year | Drain water | Total a year | Per gallon |
|---|---|---|---|---|---|
| 1 person | 102 | $160 | 34 gal ($1) | $161 | 157¢ |
| 2 people | 204 | $160 | 68 gal ($1) | $161 | 79¢ |
| 4 people | 409 | $160 | 136 gal ($3) | $163 | 40¢ |
Per-gallon costs in the table are for real use, so they also count drain water and any filter replaced at its month limit before it reaches its gallon rating. At rated filter life alone, filters cost 13¢ a gallon (the figure at the top of this page).
Rated production is 800 gallons a day; 2 people need about 0.56 — well within it. Colder water and lower pressure reduce actual output.
Replacement filters
| Filter | Rated life (gallons) | Rated life (months) | Price |
|---|---|---|---|
| WD-G3-N1CF (CF sediment/carbon composite) | 550 Source note | 6 Source note | $29.99 Source note |
| WD-G3-N3CB (CB carbon block) | 1,100 Source note | 12 Source note | $29.99 Source note |
| WD-G3P800-N2RO (RO membrane) | 2,900 Source note | 24 Source note | $139.99 Source note |
Specs
- Type
- Under-sink reverse osmosis
- Price
- $999
Source note
List price $999.00; sale $849.00 shown on brand page 2026-10-23 waterdropfilter.com
- Installation
- DIY (under-sink or inline fittings)
- Rated production
- 800 gallons per day
Source note
IAPMO NSF/ANSI 58 listing shows 3145 LPD (~831 gpd) waterdropfilter.com
- Pure to drain
- 3:1
Source note
- Needs power
- Yes
- Remineralization
- No
Compare the Waterdrop G3P800
Common questions
What does the Waterdrop G3P800 remove?
The Waterdrop G3P800 is certified (NSF/ANSI 58, NSF/ANSI 53 and NSF/ANSI 42) to reduce PFAS (PFOA/PFOS), lead, chlorine, fluoride and TDS. Waterdrop also claims VOCs from lab tests that are not certification. For 2 people drinking and cooking with it, replacement filters cost about $160 a year, and it sends about 68 gallons a year to the drain.
Does the Waterdrop G3P800 remove PFAS?
Yes. It is certified for PFOA/PFOS reduction under NSF/ANSI 53 (IAPMO R&T listing).
How much does the Waterdrop G3P800 cost to run?
About $161 a year for 2 people ($161 for 1, $163 for 4), counting replacement filters and the water sent to the drain, for drinking and cooking water (0.28 gallons per person a day, EPA's average adult intake).
Data checked 2026-10-23. 102 filters tracked.