iSpring RCC7AK 6-Stage Alkaline Reverse Osmosis review
Under-sink reverse osmosis. Plumber recommended if you are not comfortable with a drain saddle and a tank. Not a whole-house solution. Listed to NSF/ANSI 58.
What it removes
| Contaminant | Evidence | Stated reduction | Scope |
|---|---|---|---|
| Total Dissolved Solids | Certified | not stated | |
| Arsenic | Manufacturer-reported | 94% | arsenic pentavalent |
| Nitrate (as N) | Manufacturer-reported | 80% | |
| Fluoride | Manufacturer-reported | 90% | |
| Lead | Manufacturer-reported | 95% | |
| Total Trihalomethanes | Manufacturer-reported | 90% | |
| PFOA | Manufacturer-reported | 95% | |
| PFOS | Manufacturer-reported | 95% | |
| PFHxS | Manufacturer-reported | 95% | |
| PFNA | Manufacturer-reported | 95% | |
| HFPO-DA (GenX) | Manufacturer-reported | 95% | |
| PFBS | Manufacturer-reported | 95% | |
| Uranium | Manufacturer-reported | 95% | |
| Radium 226 + 228 | Manufacturer-reported | 90% | |
| Gross Alpha | Manufacturer-reported | 90% |
Certified is an NSF, WQA, or IAPMO listing for that claim.
One drinking-water tap. Not a whole-house solution.
Certifications
- NSF/ANSI 58: tds reduction (from the manufacturer's page, not yet checked against the certifier's database)
- NSF/ANSI 58: Asbestos Reduction (listing checked 2026-09-14)
- NSF/ANSI 58: Barium Reduction (listing checked 2026-09-14)
- NSF/ANSI 58: Cadmium Reduction (listing checked 2026-09-14)
- NSF/ANSI 58: Chromium (Trivalent) Reduction (listing checked 2026-09-14)
- NSF/ANSI 58: Copper Reduction (listing checked 2026-09-14)
- NSF/ANSI 58: Fluoride Reduction (listing checked 2026-09-14)
- NSF/ANSI 58: Lead Reduction (listing checked 2026-09-14)
- NSF/ANSI 58: Selenium Reduction (listing checked 2026-09-14)
Rated to 10 gpg hardness.