
Waterdrop 15UB
Score: 88/100
Pureplus Under Sink Filter
Score: 82/100Rankings

The Waterdrop 15UB is a highly rated under-sink filter offering 2 years of filtration and strong certification against PFAS and lead. Its main limitation is the lack of TDS reduction and cold-water-only operation. It is best suited for renters and homeowners seeking a low-maintenance, high-capacity solution.

The PUREPLUS WFC5300A is a high-capacity under-sink filtration system designed for easy installation and long-term maintenance-free operation, boasting a 5-year lifespan. It excels at removing chlorine, sediment, and heavy metals while retaining beneficial minerals, making it ideal for improving taste and odor. However, it is not suitable for users requiring TDS reduction or the removal of specific contaminants like fluoride and arsenic.
| Attribute | ![]() | ![]() |
|---|---|---|
0.75 gallons per minute | 2.5 gallons per minutebest | |
24 months | 60 monthsbest | |
3 | 6best | |
19,000 gallons | 22,000 gallonsbest | |
1 years | 5 yearsbest | |
| ↓ lower better | 16.34 inches | 4.5 inchesbest |
| ↓ lower better | 3.46 inchesbest | 4.5 inches |
| ↓ lower better | 3.66 inchesbest | 13.7 inches |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | ![]() | ![]() |
|---|---|---|
Value & Warranty(1) | ||
Warranty (years) | 1 years | 5 years |
Dimensions & Fit(3) | ||
Height (inches) | 16.34 inches | 4.5 inches |
Width (inches) | 3.46 inches | 4.5 inches |
Depth (inches) | 3.66 inches | 13.7 inches |
Performance & Filtration(8) | ||
Certifications | NSF/ANSI 42, 53, 372; IAPMO | NSF/ANSI 42, 372, IAPMO, Australian WaterMark, REACH |
Contaminants Removed | PFAS, PFOA/PFOS, Lead, Chlorine, Heavy Metals, Sediment, Odor | Chlorine, Odor, Heavy Metals, Sediment, Rust, VOCs, Lead, Mercury |
Flow Rate (gallons per minute) | 0.75 gallons per minute | 2.5 gallons per minute |
Filter Life (months) | 24 months | 60 months |
Filtration Stages | 3 | 6 |
Filter Capacity (gallons) | 19000 gallons | 22000 gallons |
Filtration Technology | Multistage | Activated Carbon Block |
TDS Reduction (percent) | false percent | 0 percent |
Features & Accessories(1) | ||
Included Faucet | true | false |
Installation & Compatibility(1) | ||
Installation Type | Under Sink, Push-to-Connect | Under Sink |

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

Professional reviewers recognize the Waterdrop 15UB for its certified safety and ease of use, highlighting the IAPMO certification and zero-leak performance.
Everyday users express strong satisfaction with the simplicity of installation, space-saving design, and noticeable improvement in water taste.

“Spring-like water”

“Painless setup: Renters and apartment dwellers highlight the tool-free, 3-minute installation as a major advantage”




Professional reviewers position the PUREPLUS WFC5300A as an efficient, targeted solution for households needing improved drinking water quality without the complexity of whole-house systems. Experts highlight its superiority for renters and those with adequate municipal water pressure.
Everyday users consistently praise the product for its ease of installation and the immediate improvement in water taste, often describing it as 'spring-like.' Renters and families appreciate the tool-free setup and the long-lasting 5-year capacity.