Express Water RO5DX
Score: 88/100
Aquasana Countertop
Score: 88/100Rankings
The Express Water RO5DX is a certified 5-stage under-sink reverse osmosis system that produces 50 gallons of purified water daily. It features NSF/ANSI 58 certification and an alkaline remineralization stage for improved taste. It is best suited for households of 4+ people seeking reliable, certified water purification with a compact footprint.
The Aquasana Clean Water Machine is a high-performance countertop filter that removes 78 contaminants while retaining beneficial minerals. Its main trade-off is the need for electrical power and a small tank that requires frequent refilling. It is best suited for renters or small households who need fast, certified filtration without plumbing installation.
| Attribute | | |
|---|---|---|
— | 300 gallonsbest | |
0.8 gpmbest | 0.5 gpm | |
5best | 3 | |
1 yearsbest | — | |
96 percentbest | 0 percent | |
— | 45 psibest |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | |
|---|---|---|
Safety & Compliance(2) | ||
Certifications | NSF/ANSI 58 | NSF/ANSI 42, 53, 401; WQA |
Warranty (years) | 1 years | null years |
Installation & Compatibility(2) | ||
Installation Type | Under-sink | Countertop |
Faucet Compatibility | Standard Kitchen Sinks | Cold Water Only |
Filtration Performance(6) | ||
Filtration Technology | Reverse Osmosis | Claryum |
Flow Rate (gpm) | 0.8 gpm | 0.5 gpm |
Contaminants Removed | Lead, Chlorine, Fluoride, Arsenic, Nitrates, PFAS, Bacteria, Pharmaceuticals | 78 types |
Filtration Stages | 5 | 3 |
TDS Reduction (percent) | 96 percent | 0 percent |
Operating Pressure (psi) | psi | 20-70 psi |
Capacity & Maintenance(2) | ||
Filter Life (gallons) | 12 months gallons | 300 gallons |
Annual Operating Cost (usd) | usd | null usd |
Products in the top-left offer the best value (high score, low price).
Professional reviewers highlight the RO5DX's NSF/ANSI 58 certification as a key strength, validating its TDS reduction capabilities and material safety. While experts note that the certification does not cover the full range of 158 claimed contaminants, they consider TDS reduction the most important metric for RO systems.
Users generally praise the system for its reliable performance, compact size, and the peace of mind provided by NSF certification. The all-in-one kit format is appreciated for its convenience, and users report a noticeable improvement in water taste.
Professional reviewers highlight superior filtration speed and contaminant removal capabilities compared to traditional pitcher filters, with lab tests confirming effectiveness against lead and PFAS.
Users praise the fast dispensing speed and improved taste due to retained minerals, but complain about the inconvenience of frequent refilling and the initial saturation period.
