What is the difference between WD-TSA and WD-TSB ?
WD-TSA is designed to connect to your original faucet and has different connecting options for your under sink or a RV. While WD-TSB comes with a lead-free brushed stainless steel faucet. It has a high water flow, giving you clean drinking water anytime you need it. You can make your choice based on the your household needs.
What are the differences between WD-TSA / TSB and WD-UA / UB ?
WD-TSA/ TSB is the upgrade version of WD-UA/ UB. This 3-stage under the sink filter system is composed of three filters and has more filtration materials than WD-UA/ UB. The added last two filters are full of active carbon to improve water taste greatly.
How to install the 3-stage under counter drinking water filter ?
The 3-stage under counter drinking water filter comes with a complete accessories pack, including all kinds of accessories you may need. You won’t be bothered by spending forever on assembly. Installation takes less than 3 minutes for the sake of convenient fittings. You can get more information by searching “How to install WD-TSA/ WD-TSB water filter system” on YouTube.
How to replace under counter water filters ?
Replacement takes only 3 seconds for its twist-lock design. Just pull off the old filter and insert a new one into the cap.
When to replace the filters of this under sink water filtration system ?
The 3 filters have a lifespan of 6 months, 8-12 months, and 12-18 months, respectively. The long lifespan reduces the burden of purchasing and replacing filters every now and then. Please make sure to change filters within recommended lifespan to get best purification performance and avoid the secondary pollution caused by expired filters.
Does the installation of this 3-stage under counter drinking water filter needs any tools or kits ?
The system comes with an all-you-need accessories pack, including all components you may need. No other tools or plumbing service needed.
What can this under counter water filter remove ?
This under counter water filter is more effective than one with single filter. The PP cotton effectively reduces rust, sand, large particles, etc. The granule activated carbon filter reduces chlorine, taste and odor, thus improving water taste. The natural carbon block and KDF filter prevents pollutants from accumulating and improves water taste furthermore. 
Can Waterdrop 3-stage under the sink filter system reduce TDS ?
Waterdrop under counter water filter reduces pollutants while retains natural minerals, but it would not reduce the TDS in water. If you are looking for a water filter to effectively reduce the TDS in water, please choose the reverse osmosis systems. Click here to visit our RO page.
What are the pros of this water filter for sink ?
This under counter water filter is more effective than the ones with single filter. The integrated filter design makes the installation and filter replacement easier than ever. Under this integral design, the filter is fully sealed and won’t breed pollutants, therefore ensures the filtered water stay clean and pure. The ultra-durable materials add sturdiness to prevent filter from cracking and leaking.
Why does the water leak after the installation ?
Water may leak at connection position or thread due to incomplete connection. If water leakage occurs, turn off the water supply. If the water leakage is at thread, please wrap Teflon tape on the external thread. If the water leakage is at inlet and outlet, please insert the quick-connect fitting to the end.