Waterdrop X12
#5 in TanklessFull review
For a large household that wants the fastest flow and lowest waste, and will pay a premium for it.
Amazon $1,099$1,099
3.4/5
For a buyer who wants tankless RO at a low price and low running cost and can do without third-party performance certification.
- 600 gallons a dayOutput
- 2:1Pure to drain
- $80 a yearFilters
- NoNSF/ANSI 58
Check price at Amazon$299
Price checked November 2, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Cheap filters, about $80 a year
- Low price for a tankless RO system
- Compact unit frees up cabinet space
Cons
- Not certified to NSF/ANSI 58, so its TDS reduction is unverified
- The faucet has no display; filter life shows on the unit under the sink
- Only a 1-year warranty
How it scores
The rating comes from 6 measured or published factors, each scored 0-100 against fixed reference points for its type. How we rank explains each one.
Specifications
| Model number | WD-G2P600-W |
|---|---|
| Filtration | |
| Output | 600 gallons a day |
| Pure to drain | 2:1 |
| Stages | 7 |
| Remineralization | No |
| NSF/ANSI 58 | No |
| Other certifications | NSF/ANSI 372 |
| Replacement filters | $80 a year |
| Build | |
| Tank | Tankless |
| Booster pump | Yes |
| Smart faucet | No |
| Warranty | 1 year |
Alternatives in this type
Waterdrop G3P800
#6 in TanklessFull review
For a busy kitchen that wants fast RO water and low waste from a certified system, and can pay for it.
Amazon $849$849
A. O. Smith AOS-DFRO800
#8 in TanklessFull review
For a household that wants fast, certified tankless RO for less than most rivals. Buyers without a spare faucet should get the brushed nickel version.
Amazon $449.99 Amazon $484.99$449.99
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