iSpring CU-A4
Score: 72/100
Aquasana Claryum
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 CU-A4 is a compact, tankless 4-stage ultrafiltration system that removes up to 99% of 700 contaminants while retaining beneficial minerals and producing zero wastewater. It lacks independent third-party testing data and does not reduce TDS, which are limitations for users seeking comprehensive purification. It is best suited for apartment dwellers and RV owners with limited under-sink space who prioritize mineral retention.
| Attribute | | |
|---|---|---|
0.5 gallons per minutebest | 0.5 gallons per minutebest | |
6 monthsbest | 6 monthsbest | |
4best | 3 | |
— | 600 gallonsbest | |
1 yearsbest | 1 yearsbest | |
| ↓ lower better | 12.5 inches | 9 inchesbest |
| ↓ lower better | 4.5 inches | 4.25 inchesbest |
| ↓ lower better | 10.5 inchesbest | 12 inches |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | |
|---|---|---|
Dimensions & Fit(3) | ||
Height (inches) | 12.5 inches | 9.0 inches |
Width (inches) | 4.5 inches | 4.25 inches |
Depth (inches) | 10.5 inches | 12.0 inches |
Performance & Filtration(4) | ||
Certifications | NSF/ANSI | NSF/ANSI 42, 53, 401 |
Contaminants Removed | Lead, Chlorine, PFAS, Arsenic, Heavy Metals, Chloramine, Hydrogen Sulfide, Rust, Sand, Dirt | Lead, PFAS, Microplastics, Chlorine, VOCs |
Filtration Stages | 4 | 3 |
Filtration Technology | Ultrafiltration | Claryum 3-Stage |
Features & Accessories(1) | ||
Remineralization | false | true |
Products in the top-left offer the best value (high score, low price).
The search results consist primarily of manufacturer product pages and retailer listings, with no independent professional reviews or third-party testing data included. Consequently, there is no expert editorial assessment available to validate the system's actual performance relative to the manufacturer's claims regarding contaminant removal and durability.
The provided data does not contain user reviews, customer testimonials, or recurring feedback patterns from everyday consumers. While Home Depot lists 81 customer questions and answers, the specific content of this user feedback is not included in the research data.
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.
