Waterdrop G2
Score: 88/100
Frizzlife PX500-A
Score: 85/100Rankings
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 Frizzlife PX500-A is a 7-stage tankless RO system featuring an integrated pump and alkaline remineralization for improved taste and pH balance. It offers a highly efficient 1.5:1 wastewater ratio and 500 GPD capacity, making it a strong performer for family use. It is best suited for households with limited space and those prioritizing water efficiency and mineral restoration.
| Attribute | | |
|---|---|---|
7 stagesbest | 7 stagesbest | |
400 gallons per day | 500 gallons per daybest | |
— | 94.5 percentbest | |
0 gallonsbest | 0 gallonsbest | |
10 count | 1,000 countbest | |
— | 6 monthsbest | |
| ↓ lower better | 5.91 inches | 5 inchesbest |
| ↓ lower better | 13.98 inchesbest | 18 inches |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | |
|---|---|---|
Compliance & Safety(1) | ||
Certifications | NSF/ANSI 372, FCC | Not specified |
Maintenance(1) | ||
Filter Lifespan (months) | 12-24 months | 6 months |
Design(2) | ||
System Width (inches) | 5.91 inches | 5.0 inches |
System Height (inches) | 13.98 inches | 18.0 inches |
Performance(4) | ||
Daily Production Rate (gallons per day) | 400 gallons per day | 500 gallons per day |
Wastewater Ratio | 1:1 | 1.5:1 |
Contaminants Removed (count) | 10 count | 1000 count |
Feed Water Pressure (PSI) | PSI | 20-80 PSI |
Features(2) | ||
Faucet Type | Brushed Nickel | Dedicated |
Automatic Shutoff | true | Not specified |
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.
Professional reviewers rate the Frizzlife PX500-A highly among both tankless and traditional under-sink RO systems. Experts praise its 1.5:1 wastewater ratio as nearly optimal and far superior to market averages. The integrated pump is highlighted for maintaining ideal water pressure, avoiding the drops seen in tank-based systems. Front-accessible filters are commended for making maintenance quick and simple.
Specific consumer reviews or user testimonials are not available in the provided data. However, the product listing indicates multiple users have purchased and registered the device, suggesting market adoption.
