Waterdrop G3P600 Under-sink reverse osmosis, checked against its listings
- Maker’s list price
- $539
- Five years
- $1,149
- Water to drain
- 2:1 pure to drain
Product recordListings checked Oct. 4, 2026
What the listings say
NSF/ANSI 42 · IAPMO listing
Chlorine; Taste and Odor
Read the listing, checked Oct. 4, 2026NSF/ANSI 53 · IAPMO listing
PFOA/PFOS
Read the listing, checked Oct. 4, 2026NSF/ANSI 58 · IAPMO listing
TDS; Fluoride; Cadmium; Barium; Radium 226/228; Lead
Read the listing, checked Oct. 4, 2026
Certified for, and claimed
What it costs over five years
Household of 3, 3 gallons a day of drinking and cooking water. Installation not included.
| Item | Replaced | Count | Amount |
|---|---|---|---|
| System, with first media | — | 1 | $539 |
| CF composite filter (G3-N1CF) | Every 6 monthsmonth rating | 9 | $270 |
| CB carbon block filter (G3-N3CB) | Every 12 monthsmonth rating | 4 | $120 |
| RO filter (G3P600-RO) | Every 2 yearsmonth rating | 2 | $220 |
Five-year total$1,149
Per gallon21¢
Worth knowing
Tankless. The 58 claims are for the RO filter; the 42 and 53 claims are for the carbon block, which the listings name WD-G3-CB and the maker sells as G3-N3CB. The page showed $439 with a $100-off code; the $539 list price is recorded. Remineralization and alkaline add-on filters are not on any listing.