Express Water RO5DX
Score: 85/100
Frizzlife SP99
Score: 82/100Rankings
The Express Water RO5DX is a 5-stage reverse osmosis system that provides high-quality purified water with NSF/ANSI 58 certification and alkaline remineralization. Its main trade-off is the production of wastewater and the need for regular filter maintenance. It is best suited for households of 4+ people seeking reliable daily drinking water with improved taste.
The Frizzlife SP99-NEW is an under-sink filtration system that includes a brushed nickel faucet and offers NSF-certified removal of over 99% of contaminants like lead and chlorine. It retains beneficial minerals and features a quick-change filter design. The main drawbacks are the lack of detailed expert/user feedback and missing data on filter lifespan. It is best for homeowners seeking a DIY-friendly system with a dedicated faucet.
| Attribute | | |
|---|---|---|
0.8 gallons per minute | 1.5 gallons per minutebest | |
12 monthsbest | — | |
6best | 3 | |
50 gallonsbest | — | |
1 yearsbest | — | |
| ↓ lower better | 15 inches | 14 inchesbest |
| ↓ lower better | 5 inchesbest | 5 inchesbest |
| ↓ lower better | 14 inchesbest | 15 inches |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | |
|---|---|---|
Value & Warranty(1) | ||
Warranty (years) | 1 years | years |
Dimensions & Fit(2) | ||
Height (inches) | 15.0 inches | 14.0 inches |
Depth (inches) | 14.0 inches | 15.0 inches |
Performance & Filtration(8) | ||
Certifications | NSF/ANSI 58 | NSF/ANSI 42&53 |
Contaminants Removed | Lead, Chlorine, Fluoride, Arsenic, PFAS, Bacteria | Lead, Chlorine, Chloramine, Fluoride, Heavy Metals |
Flow Rate (gallons per minute) | 0.8 gallons per minute | 1.5 gallons per minute |
Filter Life (months) | 12 months | months |
Filtration Stages | 6 | 3 |
Filter Capacity (gallons) | 50 gallons | gallons |
Filtration Technology | Reverse Osmosis | Carbon Block |
TDS Reduction (percent) | 93-99 percent | 0 percent |
Installation & Compatibility(1) | ||
Operating Pressure (psi) | 40 psi | 20-80 psi |
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. Hands-on testing confirmed a 93% TDS reduction rate, though some TDS creep was observed during idle periods. The pre-assembled kit is praised for simplifying installation.
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. Maintenance is described as simple and manageable for non-technical users.
No professional reviewer opinions or editorial summaries were found in the provided data.
No consumer sentiment data, user testimonials, or recurring themes from everyday users were available in the search results.
