Express Water RO5DX
Score: 88/100
iSpring RO800G
Score: 75/100Rankings
The Express Water RO5DX is a compact 5-stage under-sink reverse osmosis system featuring NSF/ANSI 58 certification and alkaline remineralization for improved taste. It offers a 50 GPD production rate and includes a leak detection shutoff for added safety. While it lacks the high capacity of larger systems, its pre-assembled design and remineralization feature make it a strong contender for standard households.
The iSpring RO800G is a tankless reverse osmosis under-sink water filtration system designed to deliver up to 800 gallons per day with a flow rate of 0.6 gallons per minute. It features a space-saving design that eliminates the need for a storage tank and offers a high water efficiency ratio of 2.5:1 pure to drain. The system is ideal for high-demand users needing rapid RO water such as large families, offices, or restaurants.
| Attribute | | |
|---|---|---|
5 stagesbest | 2 stages | |
50 gallons per day | 800 gallons per daybest | |
96 percentbest | — | |
4 gallonsbest | 0 gallons | |
1,000 countbest | 10 count | |
12 monthsbest | — | |
| ↓ lower better | 5 inchesbest | 6.5 inches |
| ↓ lower better | 15 inchesbest | 17.75 inches |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | |
|---|---|---|
Compliance & Safety(1) | ||
Certifications | NSF/ANSI 58 | |
Storage(1) | ||
Storage Tank Capacity (gallons) | 4 gallons | 0 gallons |
Maintenance(1) | ||
Filter Lifespan (months) | 12 months | months |
Design(2) | ||
System Width (inches) | 5.0 inches | 6.50 inches |
System Height (inches) | 15.0 inches | 17.75 inches |
Power(1) | ||
Power Requirement | false | true |
Performance(6) | ||
Filtration Stages (stages) | 5 stages | 2 stages |
Daily Production Rate (gallons per day) | 50 gallons per day | 800 gallons per day |
TDS Reduction Rate (percent) | 96 percent | percent |
Wastewater Ratio | Standard | 2.5:1 |
Contaminants Removed (count) | 1000 count | 10+ count |
Feed Water Pressure (PSI) | 40 PSI | PSI |
Features(3) | ||
Remineralization | true | |
Faucet Type | Chrome | Dedicated Faucet |
Automatic Shutoff | true | |
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.
Users generally praise the system for its reliable performance, compact size, and the peace of mind provided by NSF certification.
Search results lack in-depth expert reviews from major testing sites like Wirecutter or Consumer Reports. However, retailer descriptions and YouTube installation guides highlight the system as a top-of-the-line solution, emphasizing its fast flow, high efficiency, and next-generation features.
Limited consumer feedback is available, with one Wayfair review rating the product 3 out of 5 stars, indicating middling satisfaction without specific details.
