
Aquasana Claryum
Score: 85/100
iSpring RCC7AK Black
Score: 85/100Rankings

The Aquasana AQ-5300.55 is a 3-stage under-sink filter using Claryum technology to remove 99.99% of contaminants while retaining beneficial minerals. It is certified to multiple NSF/ANSI standards and offers a significantly faster flow rate than pitcher filters. It is best suited for households seeking rigorous contaminant reduction without the complexity of reverse osmosis.

The iSpring RCC7AK-BLK is a 6-stage under-sink reverse osmosis system certified by NSF/ANSI 58 to remove up to 99% of over 1,000 contaminants. It features an alkaline remineralization stage that restores minerals and pH balance, producing bottled-water quality taste without requiring electricity. It is best suited for homeowners with adequate water pressure (40-80 PSI) who want a pumpless, energy-efficient solution.
| Attribute | ![]() | ![]() |
|---|---|---|
0.5 gallons per minutebest | — | |
6 monthsbest | — | |
3 | 6best | |
600 gallonsbest | — | |
1 yearsbest | 1 yearsbest | |
| ↓ lower better | 9 inchesbest | 19 inches |
| ↓ lower better | 4.25 inchesbest | 16 inches |
| ↓ lower better | 12 inchesbest | 15.5 inches |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | ![]() | ![]() |
|---|---|---|
Dimensions & Fit(3) | ||
Height (inches) | 9.0 inches | 19.0 inches |
Width (inches) | 4.25 inches | 16.0 inches |
Depth (inches) | 12.0 inches | 15.5 inches |
Performance & Filtration(5) | ||
Certifications | NSF/ANSI 42, 53, 401 | NSF/ANSI 58 |
Contaminants Removed | Lead, PFAS, Microplastics, Chlorine, VOCs | Sediment, vinyl chloride, chlorine, fluoride, lead, arsenic, PFAS, asbestos, calcium, sodium |
Filtration Stages | 3 | 6 |
Filtration Technology | Claryum 3-Stage | Reverse Osmosis |
TDS Reduction (percent) | 0 percent | 97.9 percent |

Products in the top-left offer the best value (high score, low price).

Professional insights highlight Aquasana's Claryum technology as a robust filtration solution certified to multiple NSF/ANSI standards, including the stricter P473 benchmark for PFAS. Experts note the significant advantage in flow rate compared to pitcher filters.
The provided web research data does not contain user feedback, reviews, or sentiment analysis from everyday customers. Therefore, no consumer praise or recurring themes can be identified.

