Waterdrop TSUF Ultra-Filtration Under-Sink Filter Replacement — 0.01 Micron, 4000 Gallons, 24-Month Lifespan

Enhanced filtration for your kitchen

The Waterdrop TSUF Ultra-Filtration Under-Sink Filter Replacement is designed to work with Waterdrop’s under-sink system (WD-TSU-B/WD-TSU-W). Featuring a 0.01 micron ultrafiltration pore size and a generous 4000-gallon capacity, this cartridge is built for steady performance over time, keeping your daily water needs in mind.

Fast, reliable flow for everyday use

Experience a robust flow up to 1.59 GPM, so you can fill an 8-ounce cup in about 2.3 seconds. The combination of high flow and stable pressure helps keep water ready for daily cooking, beverages, and quick rinses without waiting.

Easy install, minimal maintenance

Replacing the cartridge is simple and tool-free—roughly 3 seconds with a twist. With a 24-month lifespan, you’ll replace filters less often, reducing maintenance interruptions and helping you keep your routine on track.

What you get with Waterdrop quality

• Direct compatibility with WD-TSU-B and WD-TSU-W systems for a seamless upgrade
• 0.01 micron ultrafiltration for refined filtration performance
• 4000-gallon capacity to support ongoing use and lower replacement frequency
• High flow rate and quick fill times to support busy kitchens
• Tool-free installation in seconds and a straightforward replacement process
• Waterdrop’s professional-grade materials and testing standards for reliable purification
• 1-pack replacement that fits easily into regular kitchen maintenance

Ideal scenarios for everyday use

Purified water can elevate your coffee, tea, soups, and sauces. Use it for hydration, meal prep, and beverages throughout the day—without the hassle of frequent filter changes or complex maintenance. The cartridge integrates smoothly into a busy kitchen workflow.

Why choose this replacement

As a direct replacement, it supports the continued performance of your Waterdrop system while preserving the consistent results you expect from ultrafiltration filtration. While outcomes can vary with usage, many customers appreciate the balance of capacity, speed, and ease of use.