Waterdrop TSU-WB 0.01μm Ultra-Filtration Under Sink Water Filter…: Amazon Product Spotlight
The Waterdrop TSU-WB is a 3-stage tankless under-sink water filter system that uses 0.01μm ultra-filtration. It includes a dedicated faucet and a smart panel for filter life monitoring. Please note this system does not lower TDS (it is not reverse osmosis) and requires drilling for installation.
Product Snapshot

WFT-Waterdrop
Waterdrop TSU-WB 0.01μm Ultra-Filtration Under Sink Water Filter System, 3-Stage Tankless Undersink Water Filtration with…
Best for: Under-sink filtration without removing minerals. Tankless 3-stage ultra-filtration with a smart panel and faucet. Rated 4.5 stars from 3,300 reviews; does not lower TDS and requires drilling.
- Tankless design saves space
- Smart panel monitors filter life
- High rating from many reviews
- Does not lower TDS
- Requires drilling for installation
How to Choose
When considering the Waterdrop TSU-WB, focus on your water quality needs: if you want to reduce sediment, chlorine, and larger contaminants without removing beneficial minerals, ultra-filtration is a good fit. Check that you have space under the sink for the tankless unit and are comfortable with drilling a hole for the faucet. The 4.5-star rating from over 3,300 reviews suggests consistent user satisfaction, but remember this system does not reduce TDS or remove dissolved salts.
FAQ
Does this system lower TDS?
No. The Waterdrop TSU-WB uses ultra-filtration (0.01μm), not reverse osmosis, so it does not lower Total Dissolved Solids.
Is drilling required for installation?
Yes. The product description states that drilling is required, likely for the dedicated faucet.
How many stages does it have?
It is a 3-stage filtration system.
Last updated May 28, 2026. Prices and availability can change at Amazon.