APEC Ultimate RO-90
Score: 85/100
Express Water RO5DX
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 APEC Water Systems RO-90 Ultimate Series is a WQA-certified, 5-stage under-sink reverse osmosis filtration system designed to produce 90 gallons of ultra-pure water per day. It features a durable metal frame, US-made filters with extended lifespan, and a 4-gallon storage tank to support households of four or more people. It is ideal for daily drinking and cooking in areas with high contaminants like lead, arsenic, or fluoride.
| Attribute | | |
|---|---|---|
5 stagesbest | 5 stagesbest | |
90 gallons per daybest | 50 gallons per day | |
100 percentbest | 96 percent | |
4 gallonsbest | 4 gallonsbest | |
— | 1,000 countbest | |
12 monthsbest | 12 monthsbest | |
| ↓ lower better | 5.25 inches | 5 inchesbest |
| ↓ lower better | 17.5 inches | 15 inchesbest |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | |
|---|---|---|
Compliance & Safety(1) | ||
Certifications | WQA Gold Seal | NSF/ANSI 58 |
General(1) | ||
Installation Type | Under Sink | Under-sink |
Design(2) | ||
System Width (inches) | 5.25 inches | 5.0 inches |
System Height (inches) | 17.5 inches | 15.0 inches |
Performance(4) | ||
Daily Production Rate (gallons per day) | 90 gallons per day | 50 gallons per day |
TDS Reduction Rate (percent) | 100 percent | 96 percent |
Contaminants Removed (count) | null count | 1000 count |
Feed Water Pressure (PSI) | 50 PSI | 40 PSI |
Features(1) | ||
Remineralization | false | true |
Products in the top-left offer the best value (high score, low price).
Professional reviewers from sources like Lowe's and Home Depot highlight the RO-90's premium quality, WQA certification, and superior contaminant removal capabilities. They praise the durable metal construction, eco-friendly design, and the longevity of US-made filters, positioning the system as virtually maintenance-free with a crisp taste that outperforms bottled water.
Everyday users consistently praise the excellent water quality and taste, noting significant reductions in Total Dissolved Solids (TDS). Common themes include satisfaction with the easy installation process, the long lifespan of the filters, and the overall value for obtaining pure water for growing families.
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.
