iSpring RCC7AK
#5 in With tankFull review
For buyers who want certified RO water with minerals added back for taste, at a low price. Choose a tankless system instead if cabinet space or wasted water matters more.
Amazon $199.99$199.99
The iSpring RCC7AK is the better under-sink reverse osmosis system overall, rated 3.6 to 2.8. The iSpring RCC7AK leads on certification and price. The iSpring RCC1UP wins on output. The iSpring RCC7AK 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 iSpring RCC7AK for certification (certified to NSF/ANSI 58 vs no third-party certification) and price ($199.99 vs $419.99).
- Choose the iSpring RCC1UP for output (100 gallons a day vs 75 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 | iSpring RCC7AK | iSpring RCC1UP |
|---|---|---|
| Overall rating | 3.6/5 | 2.8/5 |
| Certification 25% | 100 certified to NSF/ANSI 58 | 0 no third-party certification |
| Filter cost 20% | 60 $95 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% | 50 75 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 |
Independent measurements
iSpring RCC7AK
| Tested by | TDS reduction | Output | Pure to drain | Conditions |
|---|---|---|---|---|
| Water Filter Guru | 93 % | 35.3 gpd | 0.5 :1 | RCC7-AK tested without a booster pump on 635 ppm feed water: 44 ppm after 2 minutes of flow (114 ppm on first draw after 10 hours idle). 12 oz filled in 230.18 s; 64 oz of pure water sent 137 oz to drain (1:2.14). Date is the review update date. |
iSpring RCC1UP
No independent test published yet.
Specifications
| iSpring RCC7AK | iSpring RCC1UP | |
|---|---|---|
| Filtration | ||
| Output | 75 gallons a day | 100 gallons a day |
| Pure to drain | - | 1.5:1 |
| Stages | 6 | 6 |
| Remineralization | Yes | No |
| NSF/ANSI 58 | Yes | No |
| Other certifications | NSF/ANSI 372 | - |
| Replacement filters | $95 a year | $100 a year |
| Build | ||
| Tank | 3.2 gal | - |
| Booster pump | No | Yes |
| Smart faucet | No | No |
| Warranty | 1 year | 1 year |