Waterdrop G5P700A
#2 in TanklessFull review
For a buyer who wants certified RO with mineralized water and a smart faucet for around $300.
Amazon $309.99$309.99
3.8/5
For a buyer on a budget who still wants certified RO water with minerals added back.
- 500 gallons a dayOutput
- 2:1Pure to drain
- $125 a yearFilters
- YesNSF/ANSI 58
Check price at Amazon$229.99
Price checked November 2, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- One of the cheapest tankless systems certified to NSF/ANSI 58
- Adds minerals back for better tasting water
- Compact tankless unit
Cons
- Plain faucet with no water quality display
- Carbon filter needs changing every 6 months
- Only a 1-year warranty
The Waterdrop G5P family
Every Waterdrop G5P model we rank, smallest first. Ratings compare each against its own type.
| Model | Output | Rating | Price |
|---|---|---|---|
| Waterdrop G5P500A (this one) | 500 gallons a day | 3.8/5 | $229.99 |
| Waterdrop G5P700A | 700 gallons a day | 3.8/5 | $309.99 |
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-RG15-WAA |
|---|---|
| Filtration | |
| Output | 500 gallons a day |
| Pure to drain | 2:1 |
| Stages | 8 |
| Remineralization | Yes |
| NSF/ANSI 58 | Yes |
| Other certifications | NSF/ANSI 372 |
| Replacement filters | $125 a year |
| Build | |
| Tank | Tankless |
| Booster pump | Yes |
| Smart faucet | No |
| Warranty | 1 year |
Alternatives in this type
Delta Clarifi Tankless RO
#3 in TanklessFull review
For a household that wants a broadly certified tankless system with low running costs and a long warranty. Budget buyers can get similar output for less.
Amazon $799$799
Waterdrop G3P600
#4 in TanklessFull review
For a household that wants a certified tankless RO system with a smart faucet at a mid-range price. Its NSF 58 listing is the main reason to pick it over cheaper tankless units.
Amazon $439$439
Compare
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