APEC ROES-100
#1 in With tankFull review
For families who want a certified tank RO system with more output and a faster pour than entry models, at a low price.
Amazon $199.99$199.99
3.8/5
For buyers who want a certified, low-maintenance tank RO system with long-lasting filters.
- 90 gallons a dayOutput
- $73 a yearFilters
- YesNSF/ANSI 58
Check price at Amazon$209.99
Price checked November 2, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- US-made filters last a year between changes, so upkeep is low
- Certified to NSF/ANSI 58 by WQA
- Needs no outlet under the sink
Cons
- APEC does not publish a drain ratio
- The tank takes up much of the cabinet
- Costs more than APEC’s Essence models with similar output
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-90 |
|---|---|
| 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
iSpring RCC7
#2 in With tankFull review
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$188.09
APEC RO-Hi
#4 in With tankFull review
For cooks and families who fill pots and pitchers often and want a faster pour from a certified tank system.
Amazon $299.94$299.94
Compare
Compare the APEC RO-90 with any other under-sink reverse osmosis system →
More from APEC: every APEC product ranked.