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
The APEC ROES-100 is the better under-sink reverse osmosis system overall, rated 4.0 to 3.8. The APEC ROES-100 leads on output. The iSpring RCC7 wins on filter cost. The iSpring RCC7 costs $11.90 less ($188.09 vs $199.99).
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
Prices were last checked November 2, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the APEC ROES-100 for output (100 gallons a day vs 75 gallons a day).
- Choose the iSpring RCC7 for filter cost ($63 a year in replacement filters vs $95 a year in replacement filters).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every with tank under-sink reverse osmosis system; a clear win is highlighted. How we rank explains each one.
| Factor weight | APEC ROES-100 | iSpring RCC7 |
|---|---|---|
| Overall rating | 4.0/5 | 3.8/5 |
| Certification 25% | 100 certified to NSF/ANSI 58 | 100 certified to NSF/ANSI 58 |
| Filter cost 20% | 60 $95 a year in replacement filters | 85 $63 a year in replacement filters |
| Water wasted 15% | 82 1:1 pure to drain | 50 drain ratio not published (neutral score used) |
| Output 10% | 100 100 gallons a day | 50 75 gallons a day |
| Price 15% | 76 $199.99 | 81 $188.09 |
| Warranty 15% | 0 1-year warranty | 0 1-year warranty |
Specifications
| APEC ROES-100 | iSpring RCC7 | |
|---|---|---|
| Filtration | ||
| Output | 100 gallons a day | 75 gallons a day |
| Pure to drain | 1:1 | - |
| Stages | 5 | 5 |
| Remineralization | No | No |
| NSF/ANSI 58 | Yes | Yes |
| Other certifications | NSF/ANSI 372 | NSF/ANSI 372 |
| Replacement filters | $95 a year | $63 a year |
| Build | ||
| Tank | 4 gal | 3.2 gal |
| Booster pump | No | No |
| Smart faucet | No | No |
| Warranty | 1 year | 1 year |