
iSpring RCC1UP-AK
Score: 88/100
Waterdrop G2
Score: 88/100Rankings

The iSpring RCC1UP-AK is a 7-stage under-sink reverse osmosis system designed for residential drinking water purification, featuring a booster pump, UV sterilization, and alkaline remineralization. It removes up to 99% of over 1,000 contaminants while restoring beneficial minerals and maintaining a highly efficient 1.5:1 pure-to-waste water ratio. Best suited for homeowners with variable water pressure who need a booster pump for consistent performance.

The Waterdrop G2 is a compact, tankless under-sink RO system delivering 400 GPD with an exceptional 1:1 wastewater ratio. It features a space-saving design and optional remineralization, making it ideal for homes with limited cabinet space. However, it requires an electrical outlet and is restricted to indoor use.
| Attribute | ![]() | ![]() |
|---|---|---|
7 stagesbest | 7 stagesbest | |
100 gallons per day | 400 gallons per daybest | |
99 percentbest | — | |
— | 0 gallonsbest | |
1,000 countbest | 10 count | |
| ↓ lower better | 5.3 inchesbest | 5.91 inches |
| ↓ lower better | 19 inches | 13.98 inchesbest |
30 PSIbest | — |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | ![]() | ![]() |
|---|---|---|
Compliance & Safety(1) | ||
Certifications | NSF/ANSI | NSF/ANSI 372, FCC |
Storage(1) | ||
Storage Tank Capacity (gallons) | Not specified gallons | 0 gallons |
General(1) | ||
Installation Type | Under-sink | Under Sink |
Maintenance(1) | ||
Filter Lifespan (months) | Not specified months | 12-24 months |
Design(2) | ||
System Width (inches) | 5.3 inches | 5.91 inches |
System Height (inches) | 19.0 inches | 13.98 inches |
Performance(4) | ||
Daily Production Rate (gallons per day) | 100 gallons per day | 400 gallons per day |
Wastewater Ratio | 1.5:1 | 1:1 |
Contaminants Removed (count) | 1000 count | 10 count |
Feed Water Pressure (PSI) | 30-70 PSI | PSI |


Products in the top-left offer the best value (high score, low price).

The provided search results do not include detailed professional reviews, editor commentary, or substantial expert critiques. The product is described as an upgrade to the standard RCC7AK-UV system, suggesting it represents an improvement in the product line, but specific professional praise or criticism is not available in the sources.
The search results provided do not include detailed user reviews, testimonials, or consumer feedback sections. Consequently, there is no data regarding common praise, recurring complaints, or general sentiment from everyday users for this specific model.

Professional sources emphasize the system's efficiency and filtration effectiveness, highlighting the 400 GPD flow rate and 1:1 drain ratio as standout features.
The system maintains a 4.5-star rating, with common user praise focusing on fast water delivery, improved water quality, and the convenience of the space-saving design.

