Express Water ROALK10MBN
#9 in With tankFull review
For a buyer who wants mineralized water at a low price. The RO5DX is the safer pick if certification matters.
Amazon $199.99$199.99
The Express Water ROALK10MBN is the better under-sink reverse osmosis system overall, rated 3.0 to 2.8. The Express Water ROALK10MBN leads on price and certification. The iSpring RCC1UP wins on filter cost. The Express Water ROALK10MBN costs $220 less ($199.99 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 Express Water ROALK10MBN for price ($199.99 vs $419.99) and certification (not certified to NSF/ANSI 58; certified to NSF/ANSI 372 vs no third-party certification).
- Choose the iSpring RCC1UP for filter cost ($100 a year in replacement filters vs $143 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 | Express Water ROALK10MBN | iSpring RCC1UP |
|---|---|---|
| Overall rating | 3.0/5 | 2.8/5 |
| Certification 25% | 30 not certified to NSF/ANSI 58; certified to NSF/ANSI 372 | 0 no third-party certification |
| Filter cost 20% | 35 $143 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% | 100 100 gallons a day | 100 100 gallons a day |
| Price 15% | 76 $199.99 | 14 $419.99 |
| Warranty 15% | 0 1-year warranty | 0 1-year warranty |
Specifications
| Express Water ROALK10MBN | iSpring RCC1UP | |
|---|---|---|
| Filtration | ||
| Output | 100 gallons a day | 100 gallons a day |
| Pure to drain | - | 1.5:1 |
| Stages | 10 | 6 |
| Remineralization | Yes | No |
| NSF/ANSI 58 | No | No |
| Other certifications | NSF/ANSI 372 | - |
| Replacement filters | $143 a year | $100 a year |
| Build | ||
| Booster pump | No | Yes |
| Smart faucet | No | No |
| Warranty | 1 year | 1 year |