Waterdrop G2
Score: 88/100
iSpring RO800G
Score: 75/100Rankings
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.
The iSpring RO800G is a tankless reverse osmosis under-sink water filtration system designed to deliver up to 800 gallons per day with a flow rate of 0.6 gallons per minute. It features a space-saving design that eliminates the need for a storage tank and offers a high water efficiency ratio of 2.5:1 pure to drain. The system is ideal for high-demand users needing rapid RO water such as large families, offices, or restaurants.
| Attribute | | |
|---|---|---|
7 stagesbest | 2 stages | |
400 gallons per day | 800 gallons per daybest | |
0 gallonsbest | 0 gallonsbest | |
10 countbest | 10 countbest | |
| ↓ lower better | 5.91 inchesbest | 6.5 inches |
| ↓ lower better | 13.98 inchesbest | 17.75 inches |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | |
|---|---|---|
Compliance & Safety(1) | ||
Certifications | NSF/ANSI 372, FCC | |
General(1) | ||
Installation Type | Under Sink | Under-sink |
Maintenance(1) | ||
Filter Lifespan (months) | 12-24 months | months |
Design(2) | ||
System Width (inches) | 5.91 inches | 6.50 inches |
System Height (inches) | 13.98 inches | 17.75 inches |
Performance(4) | ||
Filtration Stages (stages) | 7 stages | 2 stages |
Daily Production Rate (gallons per day) | 400 gallons per day | 800 gallons per day |
Wastewater Ratio | 1:1 | 2.5:1 |
Contaminants Removed (count) | 10 count | 10+ count |
Features(3) | ||
Remineralization | true | |
Faucet Type | Brushed Nickel | Dedicated Faucet |
Automatic Shutoff | true | |
Products in the top-left offer the best value (high score, low price).
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.
Search results lack in-depth expert reviews from major testing sites like Wirecutter or Consumer Reports. However, retailer descriptions and YouTube installation guides highlight the system as a top-of-the-line solution, emphasizing its fast flow, high efficiency, and next-generation features.
Limited consumer feedback is available, with one Wayfair review rating the product 3 out of 5 stars, indicating middling satisfaction without specific details.
