Express Water RO5DX
Score: 88/100
Waterdrop G2
Score: 88/100Rankings
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 Waterdrop G2 is a compact, tankless under-sink RO system delivering 400 GPD with an exceptional 1:1 wastewater ratio. It features a space-saving design and optional remineralization, making it ideal for homes with limited cabinet space. However, it requires an electrical outlet and is restricted to indoor use.
| Attribute | | |
|---|---|---|
5 stages | 7 stagesbest | |
50 gallons per day | 400 gallons per daybest | |
96 percentbest | — | |
4 gallonsbest | 0 gallons | |
1,000 countbest | 10 count | |
12 monthsbest | — | |
| ↓ lower better | 5 inchesbest | 5.91 inches |
| ↓ lower better | 15 inches | 13.98 inchesbest |
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, 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 | 12-24 months |
Design(2) | ||
System Width (inches) | 5.0 inches | 5.91 inches |
System Height (inches) | 15.0 inches | 13.98 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 | 400 gallons per day |
Wastewater Ratio | Standard | 1:1 |
Contaminants Removed (count) | 1000 count | 10 count |
Feed Water Pressure (PSI) | 40 PSI | PSI |
Features(1) | ||
Faucet Type | Chrome | Brushed Nickel |
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 sources emphasize the system's efficiency and filtration effectiveness, highlighting the 400 GPD flow rate and 1:1 drain ratio as standout features.
The system maintains a 4.5-star rating, with common user praise focusing on fast water delivery, improved water quality, and the convenience of the space-saving design.
