APEC ROES-50
#7 in With tankFull review
For a small household that wants a certified tank RO system at a low price. Larger families should look at the ROES-100.
Amazon $179.99$179.99
The APEC ROES-50 is the better under-sink reverse osmosis system overall, rated 3.6 to 2.9. The APEC ROES-50 leads on filter cost and price. The APEC ROES-50 costs $180 less ($179.99 vs $359.99).
Brondell Circle RC100
#11 in With tankFull review
For a household that wants a certified, compact tank system with a filter change reminder. Families who draw a lot of water at once will outrun its small tank.
Brondell $359.99$359.99
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 ROES-50 for filter cost ($85 a year in replacement filters vs $205 a year in replacement filters) and price ($179.99 vs $359.99).
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-50 | Brondell Circle RC100 |
|---|---|---|
| Overall rating | 3.6/5 | 2.9/5 |
| Certification 25% | 100 certified to NSF/ANSI 58 | 100 certified to NSF/ANSI 58 |
| Filter cost 20% | 67 $85 a year in replacement filters | 12 $205 a year in replacement filters |
| Water wasted 15% | 50 drain ratio not published (neutral score used) | 50 drain ratio not published (neutral score used) |
| Output 10% | 0 50 gallons a day | 0 40 gallons a day |
| Price 15% | 85 $179.99 | 27 $359.99 |
| Warranty 15% | 0 1-year warranty | 0 1-year warranty |
Specifications
| APEC ROES-50 | Brondell Circle RC100 | |
|---|---|---|
| Filtration | ||
| Output | 50 gallons a day | 40 gallons a day |
| Stages | 5 | 4 |
| Remineralization | No | No |
| NSF/ANSI 58 | Yes | Yes |
| Other certifications | NSF/ANSI 372 | NSF/ANSI 42, 53, 372 |
| Replacement filters | $85 a year | $205 a year |
| Build | ||
| Tank | 4 gal | 1.6 gal |
| Booster pump | No | No |
| Smart faucet | No | Yes |
| Warranty | 1 year | 1 year |