Express Water RO5DX
Score: 88/100
APEC Essence ROES-PH75
Score: 82/100Rankings
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 APEC Water Systems ROES-PH75 Essence Series is a 6-stage under-sink reverse osmosis system rated at 75 gallons per day, designed to produce alkaline mineral-enhanced water by adding high-purity calcium carbonate. It features a solid metal frame for durability, large-capacity block filters for extended life, and an eco-friendly low waste ratio with automatic shut-off. It is ideal for families wanting 99% contaminant removal plus pH boost for taste and health preferences.
| Attribute | | |
|---|---|---|
5 stages | 6 stagesbest | |
50 gallons per day | 75 gallons per daybest | |
96 percent | 99 percentbest | |
4 gallonsbest | 4 gallonsbest | |
1,000 countbest | — | |
12 monthsbest | — | |
| ↓ lower better | 5 inchesbest | 5.25 inches |
| ↓ lower better | 15 inchesbest | 17.5 inches |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | |
|---|---|---|
Compliance & Safety(1) | ||
Certifications | NSF/ANSI 58 | WQA Certified |
General(1) | ||
Installation Type | Under-sink | Under Sink |
Design(2) | ||
System Width (inches) | 5.0 inches | 5.25 inches |
System Height (inches) | 15.0 inches | 17.5 inches |
Performance(5) | ||
Filtration Stages (stages) | 5 stages | 6 stages |
Daily Production Rate (gallons per day) | 50 gallons per day | 75 gallons per day |
TDS Reduction Rate (percent) | 96 percent | 99 percent |
Wastewater Ratio | Standard | Low |
Contaminants Removed (count) | 1000 count | null count |
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.
Search results lack in-depth expert reviews from major testing sites like Wirecutter or Consumer Reports. Product pages emphasize manufacturer guarantees of premium components and 2x contaminant removing capacity. A YouTube installer/review video highlights successful installation and TDS reduction testing, positioning the system as worthwhile for clean water.
Limited direct quotes are available, but Home Depot and Lowe's pages note high engagement with 246 questions and answers. Common inferred praise includes effective TDS reduction and easy DIY installation. Recurring complaints are not detailed, though potential issues from similar RO systems include initial setup plumbing challenges.
