
Waterdrop TSU
Score: 78/100
Waterdrop 15UB-UF
Score: 85/100Rankings

The Waterdrop 15UB-UF is a compact under-sink ultrafiltration system designed for high-capacity bacteria and chlorine reduction with minimal installation effort. Its primary limitation is the inability to remove dissolved solids like TDS or PFAS, making it less comprehensive than carbon block or RO systems. It is best suited for budget-conscious users seeking a simple, high-capacity solution for municipal tap water.

The Waterdrop TSU is a compact, tankless under-sink filtration system that uses 0.01-micron ultrafiltration to remove contaminants like PFAS and fluoride while retaining beneficial minerals. Its zero-wastewater design and smart filter-life indicator make it an eco-friendly and convenient choice for space-constrained kitchens. However, the low flow rate and lack of TDS reduction limit its suitability for high-demand households or those needing absolute purity.
| Attribute | ![]() | ![]() |
|---|---|---|
0.6 gallons per minute | 0.75 gallons per minutebest | |
24 monthsbest | 24 monthsbest | |
3best | 3best | |
— | 16,000 gallonsbest | |
1 yearsbest | 1 yearsbest | |
| ↓ lower better | 18.62 inches | 16.7 inchesbest |
| ↓ lower better | 6.38 inches | 3.6 inchesbest |
| ↓ lower better | 18.39 inches | 3.9 inchesbest |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | ![]() | ![]() |
|---|---|---|
Dimensions & Fit(3) | ||
Height (inches) | 18.62 inches | 16.7 inches |
Width (inches) | 6.38 inches | 3.6 inches |
Depth (inches) | 18.39 inches | 3.9 inches |
Performance & Filtration(4) | ||
Certifications | NSF/ANSI 372 | NSF/ANSI 42, 53, 372 |
Contaminants Removed | Chlorine, Chloramine, PFAS, Lead, Fluoride, Heavy Metals, VOCs | Bacteria, Chlorine, Lead, Heavy Metals |
Flow Rate (gallons per minute) | 0.6 gallons per minute | 0.75 gallons per minute |
Filter Capacity (gallons) | gallons | 16000 gallons |
Installation & Compatibility(3) | ||
Installation Type | Under Sink | Under-sink |
Operating Pressure (psi) | 14.5-87 psi | 60 psi |
Installation Time (hours) | 1 hours | 0.05 hours |


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

Expert reviewers highlight the Waterdrop TSU's strong filtration performance and practical design, noting its superior ultrafiltration membrane that balances contaminant removal with mineral retention. The system is praised for its compact form factor and the convenience of the smart panel.
Customer feedback reflects strong satisfaction with the product, particularly regarding effective taste and odor removal and the reliability of the smart filter indicators. Users appreciate the easy installation and compact fit under standard sinks.

No user reviews are currently available on major retail platforms, limiting insights into everyday consumer experiences. However, the product's NSF/ANSI certification and widespread availability across major retailers suggest market acceptance.

