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Installed under-sink ROUnder-sink reverse osmosis
Aquasana SmartFlow Reverse Osmosis (AQ-SFRO2)
The strongest under-sink pick when the concern is ingestion-risk contaminants.
Price last checked during our buy audit; current price may differ. Affiliate links.
Best fit
Homeowners or renters allowed to install an under-sink RO system who want the broadest verified cert profile in this catalog.
Not a fit if
A no-install countertop or pitcher setup, or a whole-house shower/taste problem.
Certification evidence
This table comes from our product-level certification map, not from a brand-level assumption. We separate verified third-party claims from caveated manufacturer-stated claims.
| Standard | Claim scope | Status |
|---|---|---|
| NSF/ANSI 42 | Drinking Water Treatment Units, Aesthetic Effects (Plumbed-In to Separate Tap) | Verified |
| NSF/ANSI 53 | Drinking Water Treatment Units, Health Effects (Plumbed-In to Separate Tap); includes P473 | Verified |
| NSF/ANSI 58 | Reverse Osmosis Drinking Water Treatment Systems | Verified |
| NSF/ANSI 401 | Emerging Compounds and Incidental Contaminants | Verified |
| CSA B483.1 | Canadian Drinking Water Treatment Systems | Verified |
Verified reductions / claims
- NSF/ANSI 42: Aesthetic Chlorine, Aesthetic Chloramine, Taste and Odor, Nominal Particulate Class I
- NSF/ANSI 53: Lead, Cyst, VOC (as chloroform), PFOS, PFOA, Mercury, Asbestos, MTBE, Turbidity
- NSF/ANSI 58: TDS, Lead, Arsenic V, Fluoride, Hexavalent Chromium, Trivalent Chromium, Barium, Cadmium, Copper, Radium 226/228, Selenium, Turbidity, Cyst
- NSF/ANSI 401: Atenolol, Bisphenol A, Carbamazepine, DEET, Estrone, Ibuprofen, Linuron, Meprobamate, Microplastics, Naproxen, Nonyl Phenol
- CSA B483.1: materials / system-component certification; not a contaminant-reduction list