iSpring RCC7P-AK
Score: 92/100
Express Water RO5DX
Score: 88/100Rankings
The iSpring RCC7P-AK is a 6-stage under-sink reverse osmosis system designed to remove over 1,000 contaminants while restoring beneficial minerals. It features a built-in electric booster pump that ensures high efficiency and consistent performance in homes with low incoming water pressure. This makes it a maximum performance option for households with suboptimal water pressure.
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 | | |
|---|---|---|
6 stagesbest | 5 stages | |
75 gallons per daybest | 50 gallons per day | |
97.9 percentbest | 96 percent | |
2 gallons | 4 gallonsbest | |
1,000 countbest | 1,000 countbest | |
6 months | 12 monthsbest | |
| ↓ lower better | 8 inches | 5 inchesbest |
| ↓ lower better | 18 inches | 15 inchesbest |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | |
|---|---|---|
Storage(1) | ||
Storage Tank Capacity (gallons) | 2 gallons | 4 gallons |
Maintenance(1) | ||
Filter Lifespan (months) | 6 months | 12 months |
Design(2) | ||
System Width (inches) | 8.0 inches | 5.0 inches |
System Height (inches) | 18.0 inches | 15.0 inches |
Power(1) | ||
Power Requirement | true | false |
Performance(3) | ||
Filtration Stages (stages) | 6 stages | 5 stages |
Daily Production Rate (gallons per day) | 75 gallons per day | 50 gallons per day |
TDS Reduction Rate (percent) | 97.9 percent | 96 percent |
Products in the top-left offer the best value (high score, low price).
Professional sources consistently highlight the iSpring RCC7P-AK as a maximum performance option in its category, praising the addition of the booster pump and alkaline remineralization.
Everyday users report noticeable taste improvements after three months of use, describing the water as having a smooth, slightly sweet profile that feels healthier than tap water.
“removes impurities flawlessly, leaving water that is crystal-clear with a crisp, refreshing taste”
“smooth, slightly sweet profile and more natural taste compared to standard RO water”
“barely heard over normal kitchen activity”
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.
