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
2.8/5
For a buyer who wants the broadest certification and mineralized water in a tank system. The running cost is high, so budget buyers should look elsewhere.
- 51.4 gallons a dayOutput
- $310 a yearFilters
- YesNSF/ANSI 58
Check price at Aquasana$479.99
Price checked November 2, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Certified to NSF/ANSI 58 and four other standards
- Adds minerals back for taste
- A lab test measured 95% TDS removal
Cons
- Filters cost about $310 a year, among the highest here
- About two gallons go down the drain per gallon made
- Costs about $480, a lot for a tank system
How it scores
The rating comes from 6 measured or published factors, each scored 0-100 against fixed reference points for its type. How we rank explains each one.
Independent measurements
Dissolved solids reduction, output and drain ratio measured by independent testers.
| Tested by | TDS reduction | Output | Pure to drain | Conditions |
|---|---|---|---|---|
| Water Filter Guru | 95.4 % | - | - | TDS before and after filtration on the reviewer’s tap water. |
| Water Filter Guru | - | 44.6 gpd | - | At 51 psi and 59.2 F. |
| Water Filter Guru | - | - | 0.5 :1 | 64 oz test gave 1:2; a 12 oz test gave 1:2.25. |
Specifications
| Model number | AQ-SFRO2 |
|---|---|
| Filtration | |
| Output | 51.4 gallons a day |
| Stages | 4 |
| Remineralization | Yes |
| NSF/ANSI 58 | Yes |
| Other certifications | NSF/ANSI 42, 53, 372, 401 |
| Replacement filters | $310 a year |
| Build | |
| Tank | 3.2 gal |
| Booster pump | No |
| Smart faucet | No |
| Warranty | 2 years |
| Released | 2023 |
Alternatives in this type
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
Home Master TMHP HydroPerfection
#14 in With tankFull review
For well water homes that want UV and an iron prefilter with low water waste. On treated city water the cheaper TMAFC-ERP does the same job.
Amazon $502.06 Home Master $499.95$499.95
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