For a household that wants proven, certified RO water at a low price and does not mind a tank under the sink. Filters cost little and are easy to find.
Amazon $188.09
For cooks and families who fill pots and pitchers often and want a faster pour from a certified tank system.
- 90 gallons a dayOutput
- $73 a yearFilters
- YesNSF/ANSI 58
Price checked November 2, 2026. As an Amazon Associate we earn from qualifying purchases.
- 3/8 inch faucet line fills pitchers and pots faster than standard RO
- Filters last a year between changes, so upkeep is low
- Certified to NSF/ANSI 58 by WQA
- Costs about $100 more than the RO-90 for the faster pour
- APEC does not publish a drain ratio
- The tank takes up much of the cabinet
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 | RO-Hi |
|---|---|
| Filtration | |
| Output | 90 gallons a day |
| Stages | 5 |
| Remineralization | No |
| NSF/ANSI 58 | Yes |
| Other certifications | NSF/ANSI 372 |
| Replacement filters | $73 a year |
| Build | |
| Tank | 4 gal |
| Booster pump | No |
| Smart faucet | No |
| Warranty | 1 year |
Alternatives in this type
For buyers who want a certified, low-maintenance tank RO system with long-lasting filters.
Amazon $209.99For buyers who want certified RO water with minerals added back for taste, at a low price. Choose a tankless system instead if cabinet space or wasted water matters more.
Amazon $199.99Compare
Compare the APEC RO-Hi with any other under-sink reverse osmosis system →
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