APEC Ultimate RO-90
Score: 85/100
iSpring RCC7AK Black
Score: 85/100Rankings
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.
The iSpring RCC7AK-BLK is a 6-stage under-sink reverse osmosis system certified by NSF/ANSI 58 to remove up to 99% of over 1,000 contaminants. It features an alkaline remineralization stage that restores minerals and pH balance, producing bottled-water quality taste without requiring electricity. Best suited for homeowners seeking superior drinking water quality with bottled-water taste.
| Attribute | | |
|---|---|---|
5 stages | 6 stagesbest | |
90 gallons per daybest | 75 gallons per day | |
100 percentbest | 97.9 percent | |
4 gallonsbest | — | |
— | 1,000 countbest | |
12 monthsbest | — | |
| ↓ lower better | 5.25 inchesbest | 16 inches |
| ↓ lower better | 17.5 inchesbest | 19 inches |
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 |
Storage(1) | ||
Storage Tank Capacity (gallons) | 4 gallons | Not specified gallons |
General(1) | ||
Installation Type | Under Sink | Under-sink |
Maintenance(1) | ||
Filter Lifespan (months) | 12 months | Not specified months |
Design(2) | ||
System Width (inches) | 5.25 inches | 16.0 inches |
System Height (inches) | 17.5 inches | 19.0 inches |
Performance(5) | ||
Filtration Stages (stages) | 5 stages | 6 stages |
Daily Production Rate (gallons per day) | 90 gallons per day | 75 gallons per day |
TDS Reduction Rate (percent) | 100 percent | 97.9 percent |
Contaminants Removed (count) | null count | 1000 count |
Feed Water Pressure (PSI) | 50 PSI | 40-80 PSI |
Features(2) | ||
Remineralization | false | true |
Faucet Type | Chrome | Black |
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.
