Waterdrop G2P600 Tankless Reverse Osmosis System (600 GPD) review
Under-sink reverse osmosis. Plumber recommended if you are not comfortable with a drain saddle and a tank. Not a whole-house solution. No third-party certification on record. Claims below are manufacturer-reported.
What it removes
| Contaminant | Evidence | Stated reduction | Scope |
|---|---|---|---|
| Total Dissolved Solids | Manufacturer-reported | not stated | |
| PFOA | Manufacturer-reported | not stated | |
| PFOS | Manufacturer-reported | not stated | |
| Fluoride | Manufacturer-reported | not stated |
Certified is an NSF, WQA, or IAPMO listing for that claim.
One drinking-water tap. Not a whole-house solution.
Budget tankless 7-stage, pump-driven, requires outlet; 2:1 pure-to-drain. Two filters: G2CF 12 mo/1,100 gal ($29.99) and G2P6MRO membrane 24 mo/3,300 gal ($99.99); annual_replacement_cost est. $79.99. Manufacturer and Amazon listing state NSF/ANSI 372 (lead-free materials) only; certifier not named and not found in NSF listing search, so no certification row recorded. No NSF/ANSI 58 performance certification claimed for this model. Manufacturer lists TDS, PFAS/PFOA/PFOS, fluoride and heavy-metal reduction without model-specific percentages. Amazon base listing B08746M1NX $299.00 in stock 2026-09-14 (newer listing B0F99F48QW was unavailable).