APEC RO-90
#3 in With tankFull review
For buyers who want a certified, low-maintenance tank RO system with long-lasting filters.
Amazon $209.99$209.99
The APEC RO-90 is the better under-sink reverse osmosis system overall, rated 3.8 to 2.8. The APEC RO-90 leads on certification, price and filter cost. The iSpring RCC1UP wins on output. The APEC RO-90 costs $210 less ($209.99 vs $419.99).
iSpring RCC1UP
#12 in With tankFull review
For homes on well water or low line pressure that want a pump and UV stage in a tank system. Buyers on city water get certification for far less with the RCC7.
Amazon $419.99$419.99
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 RO-90 for certification (certified to NSF/ANSI 58 vs no third-party certification), price ($209.99 vs $419.99) and filter cost ($73 a year in replacement filters vs $100 a year in replacement filters).
- Choose the iSpring RCC1UP for output (100 gallons a day vs 90 gallons a day).
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 RO-90 | iSpring RCC1UP |
|---|---|---|
| Overall rating | 3.8/5 | 2.8/5 |
| Certification 25% | 100 certified to NSF/ANSI 58 | 0 no third-party certification |
| Filter cost 20% | 77 $73 a year in replacement filters | 57 $100 a year in replacement filters |
| Water wasted 15% | 50 drain ratio not published (neutral score used) | 91 1.5:1 pure to drain |
| Output 10% | 80 90 gallons a day | 100 100 gallons a day |
| Price 15% | 72 $209.99 | 14 $419.99 |
| Warranty 15% | 0 1-year warranty | 0 1-year warranty |
Specifications
| APEC RO-90 | iSpring RCC1UP | |
|---|---|---|
| Filtration | ||
| Output | 90 gallons a day | 100 gallons a day |
| Pure to drain | - | 1.5:1 |
| Stages | 5 | 6 |
| Remineralization | No | No |
| NSF/ANSI 58 | Yes | No |
| Other certifications | NSF/ANSI 372 | - |
| Replacement filters | $73 a year | $100 a year |
| Build | ||
| Tank | 4 gal | - |
| Booster pump | No | Yes |
| Smart faucet | No | No |
| Warranty | 1 year | 1 year |