Express Water RO5DX
Score: 88/100
VonWater 800GPD
Score: 92/100Rankings
The VonWater V2-800N is a high-capacity, tankless reverse osmosis system that delivers 800 GPD with a highly efficient 2:1 wastewater ratio. It features a compact design that saves space and NSF/ANSI 372 certification for safety, though it requires an electrical outlet and professional-grade installation. It is best suited for households with high water needs and limited cabinet space.
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.
| Attribute | | |
|---|---|---|
5 stages | 7 stagesbest | |
50 gallons per day | 800 gallons per daybest | |
96 percentbest | — | |
4 gallonsbest | 0 gallons | |
1,000 countbest | 9 count | |
12 monthsbest | — | |
| ↓ lower better | 5 inches | 4.9 inchesbest |
| ↓ lower better | 15 inchesbest | 16.3 inches |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | |
|---|---|---|
Compliance & Safety(1) | ||
Certifications | NSF/ANSI 58 | NSF/ANSI 372, EPA, SGS, FCC |
Storage(1) | ||
Storage Tank Capacity (gallons) | 4 gallons | 0 gallons |
General(1) | ||
Installation Type | Under-sink | Under Sink |
Maintenance(1) | ||
Filter Lifespan (months) | 12 months | 6-24 months |
Design(2) | ||
System Width (inches) | 5.0 inches | 4.9 inches |
System Height (inches) | 15.0 inches | 16.3 inches |
Power(1) | ||
Power Requirement | false | true |
Performance(5) | ||
Filtration Stages (stages) | 5 stages | 7 stages |
Daily Production Rate (gallons per day) | 50 gallons per day | 800 gallons per day |
Wastewater Ratio | Standard | 2:1 |
Contaminants Removed (count) | 1000 count | 9 count |
Feed Water Pressure (PSI) | 40 PSI | 14.5-87 PSI |
Features(2) | ||
Remineralization | true | false |
Faucet Type | Chrome | Stainless Steel |
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.
Professional reviewers highlight the system's exceptional filtration efficiency combined with significant space optimization and the efficient 2:1 pure-to-drain ratio.
Users consistently praise the effective filtration performance, space efficiency, and easy filter maintenance, though some note the installation complexity.
