WaterdropG3P800 Tankless Reverse Osmosis System, 800 GPD
Waterdrop’s flagship tankless RO system with UV sterilization and the broadest certification coverage in the range.
$999
We may earn a commission if you buy through this link. It never affects our scores. How this works
Usability
Usability
The G3P800 is the strongest system Waterdrop sells and the only one whose certification claims hold up under scrutiny. IAPMO R&T certifies it against NSF/ANSI 42 and 53 (chlorine, taste, odour and health-effect claims), 58 (TDS reduction) and 372 (lead-free materials) — four standards, where most of the Waterdrop range carries 372 alone. Independent lab testing by Water Filter Guru measured 886 GPD against the claimed 800 and found no detected contaminant left above health guideline levels. The 3:1 pure-to-drain ratio is genuinely class-leading. Caveats are real: filters run about $160 a year, there is no remineralization stage so the output tastes flat to anyone used to spring water, and the warranty is a single year on a $999 machine.
- Certified by IAPMO to NSF/ANSI 42, 53, 58 and 372
- Independently lab-verified above its claimed 800 GPD
- 3:1 pure-to-drain wastes far less water than tank systems
- Built-in UV sterilizer
- Tankless design frees up under-sink space
- 30-minute DIY installation
- One-year warranty is short for the price
- No remineralization stage, so water tastes flat
- Roughly $160/year in replacement filters
- Proprietary cartridges with no certified third-party equivalents
- Requires a nearby electrical outlet
The G3P800 is Waterdrop's flagship under-sink RO system: 800 GPD tankless output, ten filtration stages, a built-in UV sterilizer and a 3:1 pure-to-drain ratio that wastes markedly less water than a conventional tank system. It is the only unit in the Waterdrop line carrying IAPMO certification against all four relevant NSF/ANSI standards.
Additional information
Specification: Waterdrop G3P800 Tankless Reverse Osmosis System, 800 GPD
| Water Filtration Specifications | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||
| General Specifications | ||||||||||||
|
||||||||||||
Questions answered from our data
Is Waterdrop a good brand?We list 29 Waterdrop products and score 29 of them. Their overall scores run from 5.0 to 7.6, with a median of 6.0, against a median of 5.7 for all 284 products we score.
How much does a reverse osmosis system cost?The 69 reverse osmosis systems we list run from $165 to $3,779, with a median of $367.
How long do reverse osmosis filters last?Of the 69 reverse osmosis systems we list, 64 state a filter life; the most common is 6-12 months (62).
Does reverse osmosis remove fluoride?63 of the 76 reverse osmosis systems we list claim to reduce fluoride.
