APEC Essence ROES-50
Score: 78/100
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 ROES-50 Essence is a budget-friendly 5-stage under-sink reverse osmosis system designed for DIY installation, producing 50 gallons of purified water daily. It features a 4-gallon storage tank and utilizes a FILMTEC membrane to remove up to 99% of contaminants, including lead, arsenic, and PFAS. However, experts note its high wastewater ratio and lack of full NSF/ANSI 58 certification compared to newer, more efficient models.
| Attribute | | |
|---|---|---|
5 stagesbest | 5 stagesbest | |
50 gallons per daybest | 50 gallons per daybest | |
99.99 percentbest | 96 percent | |
4 gallonsbest | 4 gallonsbest | |
1,000 countbest | 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(2) | ||
TDS Reduction Rate (percent) | 99.99 percent | 96 percent |
Wastewater Ratio | 3:1 | Standard |
Features(2) | ||
Remineralization | false | true |
Faucet Type | Brushed Nickel | Chrome |
Products in the top-left offer the best value (high score, low price).
Professional reviewers praise the APEC ROES-50 as a top pick for filtration performance relative to its price, describing it as a proven workhorse that punches above its weight class in removing critical contaminants.
Everyday consumers generally express high satisfaction with the water quality, noting it tastes better than bottled water and effectively removes city water odors. Recurring complaints focus on the messiness of changing filters, slow flow rates in low-pressure homes, and the high volume of wastewater produced.
“Great-tasting water, easy install, reliable for years.”
“Removes bad taste/odor from city water; better than bottled.”
“Filter changes messy; water everywhere.”
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.
