Waterdrop

Waterdrop TST-UF 0 01 m Ultra-Filtration Under Sink Water Filter System Stainless Steel Water Filter for Sink 5X

595+ bought in the past month

$149.99$189.99

About this item

  • 【Important Note】: This under sink water filter system does NOT reduce TDS. It is specifically designed for municipal tap water and can only be used with cold water sources. It is not suitable for well water or hot water. Suitable for faucets with 1/2" or 3/8" FEMALE NPT thread. Need to connect to a quick-connect faucet? Just reach out — we’ll gladly send free connection fittings.
  • 【Replacing your filter? 】To replace the filter for your TST-UF/TST-UF-B under-sink water filtration system, Please search for B0D91M9322 for the WD-P1 filter, B0D91VJ8ZK for the WD-U2 filter, B0D91VQ298 for the WD-C3 filter.
  • 【EFFICIENT FILTRATION & BETTER TASTE】: This under sink water filtration system elevates your water game, giving you a taste that's better than your run-of-the-mill bottled water. And forget about that pricey coffee joint—brew up java at home that'll knock your socks off. Plus, if you've got a little one, whip up some delicious milk powder or drinks in a jiffy.
  • 【SIMPLE INSTALLATION】: Hook it up directly to your 3/8" or 1/2" home water pipe. If you're a DIY pro, you'll breeze through setup. Not a handyman? No sweat—we've got handy installation videos and instructions, plus our customer service team is on standby to answer any questions.
  • 【FAST AND STABLE WATER FLOW】: Ain't nobody got time to wait around for water. With a flow rate of up to 1.59GPM, this under sink water filter fills up an 8-ounce cup in just 2.3 seconds. It's lightning-fast and stays steady, so you can whip up meals or mix baby formula in record time.
  • 【LONG FILTER LIFE AND MORE GOOD FOR THE ENVIRONMENT】:These filters are built to last. The PP filter goes strong for 6-8 months, the UF filter for a year, and the CT filter for 12-24 months. Plus, by cutting down on plastic casing changes, we're saving Mother Earth from 500,000 pounds of waste each year—that's enough space to plant 20,000 trees!
  • 【FILTERS LARGE VOLUME OF SUBSTANCES】: This under sink water filtration system has 6 layers of top-notch filter materials, including a precision ultrafiltration membrane that can reduce impurities larger than 0.01 microns. Say goodbye to chlorine, heavy metals, funky odors, and more.
  • 【MULTIPLE PLACEMENT OPTIONS】: Stick it on the floor or hang it on the wall—this under sink water filter's as versatile as they come. And if you're short on space, slap it right onto your faucet without any extra drilling.
  • 【HIGH-QUALITY AND STURDY MATERIALS】: Crafted from tough, lead-free 304 stainless steel, this undersink water filter system is built to last. Plus, it's got a sleek look and a thick sealing ring to keep leaks at bay. And did we mention it's saving the planet from a boatload of plastic waste?
  • 【NOTE! CANNOT REDUCE TDS】: Just a heads-up—this under sink water filter won't reduce TDS. This under sink water filtration system will retain some beneficial minerals for our bodies, such as potassium, calcium, sodium, and magnesium. And hey, we're keeping it natural with coconut shell raw materials. But if you've got a coconut allergy, steer clear.
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Product details

BrandWaterdrop
Special FeatureDrill-free installation, Recyclable housing, Lasts longer, less plastic, eco-friendly. Lead-free 304 stainless steel, Multiple arrangement options to be hung on the cabinet wall or placed on the floor, The 0.01 μm precise ultrafiltration membrane reduces most harmful Substances larger than 0.01 μm, The under sink water filter has the flow rate as high as 1.59 GPM See more
Product Dimensions12.99"L x 4.92"W x 14.49"H
MaterialStainless Steel
Capacity8000 Gallons
Included ComponentsUnder Sink Water Filter ·Inlet&Outlet hose ·3/8"–1/2" Convertor set ·Teflon tape
Package InformationBottle
Installation Typehung on the cabinet wall or placed on the floor
Purification Methodreduce most harmful Substances that are larger than 0.01 um
Power SourceGravity-fed Or Pressure-operated

Technical specifications

brandWaterdrop
special_featureDrill-free installation, Recyclable housing, Lasts longer, less plastic, eco-friendly. Lead-free 304 stainless steel, Multiple arrangement options to be hung on the cabinet wall or placed on the floor, The 0.01 μm precise ultrafiltration membrane reduces most harmful Substances larger than 0.01 μm, The under sink water filter has the flow rate as high as 1.59 GPM
product_dimensions12.99"L x 4.92"W x 14.49"H
package_informationBottle
installation_typehung on the cabinet wall or placed on the floor
power_sourceGravity-fed Or Pressure-operated
model_nameWD-TST
maximum_flow_rate1.59 Gallons Per Minute
upper_temperature_rating130 Degrees Fahrenheit
eu_spare_part_availability_duration3 Years
manufacturerWaterdrop
item_weight12.32 pounds
item_model_numberWD-TST
date_first_availableJanuary 14, 2021
best_sellers_rank#23,340 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #55 in Under-Sink & Countertop Filtration

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Customer reviews

4.5876 ratings

Customers say

Customers find the water filter system easy to install, with one mentioning it can be connected under the sink, and they appreciate its stainless steel finish that looks good.

★★★★★

Great system, high quality stainless steel, easy installation

Chris StahlsmithJanuary 14, 2025✓ Verified purchase

This is a great under-sink filtration system. The water is clear and tastes great. It comes with two quick-connect 3/8 lines that make it easy to connect and disconnect the unit from the supply and faucet. This means you can just shut off the supply valve, disconnect the whole unit, and change the filters from the counter-top, then easily put the system back under the sink and quickly reconnect. Love it! No need to crawl and crouch under the sink the whole time. The finish is high quality stainless steel, and comes with a black steel filter wrench for changing the filters, which is a nice touch. It looks beautiful and feels "quality", not cheap plastic. Connecting from the water supply was easy. I chose to split my supply so the main faucet remains unfiltered, and only the separate drinking-water faucet is filtered. I added a dual-valve compression fitting to replace the existing single valve, which has nothing to do with this unit but necessary for my setup. Pretty simple. The supply side to the filter was easy to connect using one of the supply lines with the female connector. The other provided supply line has a male end, for which I had to buy an adapter to convert the 3/8 male line to a 1/4 female so I could connect to my faucet. Check your faucet connection... if the faucet itself is 3/8 female, you're all set. If not, you'll need to purchase an adapter to take 3/8 male to whatever you have. This filter system is very fast! It is just as quick to fill as the main faucet, even when going through the mini faucet. It's amazing how efficient it is. I mainly use it to fill a coffee carafe each morning, and it is such a pleasure vs the trickle coming from the fridge water filler that I was using before. Read more

★★★★★

Great product

Shawn E.January 4, 2026✓ Verified purchase

This was to easy to install, like a breeze So far it working really great, currently live in town an u couldn't drink the water taste like bleach all the time, but now with this unit install couldn't believe how much a difference it made, u can actually drink the water now an used it for cooking, it was well worth the money spend. Iam glad an happy I got this. Read more

★★★★★

Works as advertise and removes the bad taste from kitchen sink water

David In DRESHER PaSeptember 8, 2025✓ Verified purchase

Easy to install and only required a little retightening to stop a slow drip from the connections. The manufacturer's web site has a product selection guide based on your location and water company. I was mostly concerned about removing the Chloramine distaste. Which was effectively removed. I plumbed it myself with simple tools and no diverter to a separate drinking tap, it has enough flow for our kitchen sink faucet, so all our water there is filtered. Much easier than a whole house system and more cost effective, since we are okay with the public H2O for laundry and showers. As others indicate, there is no indicator for a filter change, however just put it on your e-calendar to change after 6 months, or if you think to flow rate is too slow. Read more

★★★★☆

It’s good. Not designed for the Waterdop faucet. Connectors are difficult.

sarahssweetsJune 22, 2025✓ Verified purchase

The good: it’s not plastic, it works, the standard installation is easy. The bad: it uses push connectors which leave me anxious about it popping out and causing a flood, the little clips are very difficult to install correctly, we did a test run on the counter prior to pushing in the hose- which was a good idea- so we could clearly tell what it was supposed to look like. Under the sink is much more difficult. Once the hose is properly pushed in, getting that blue clip under the gray plastic hose retainer required a tool to lift the collar up enough to get it securely in the correct place. If I didn’t do our own plumbing (major plumbing- total reno’s and plumbing repairs and new installations to explain I really know plumbing) I may not have appreciated that it was far too easy to fail to get it on correctly and potentially have failure there. The directions should have had far more detail about the clip- FAR more. Anyway, got it secured. Why can’t there be an option to replace the connector with threaded parts? I would have removed the pop in and replaced the hoses if those connections were removable. I did that with my 30+ year plastic filter that I was replacing. The stainless housing bodies are very challenging to screw off and line up to screw back on. We opened them, also added some silicone grease to the gasket in part to be sure they secured a good seal also to ease the removal in a few months when it was time to change the filter. The metal threads are not the smoothest. But I understand the trade off with getting rid of the plastic- just mentioning it. We will have to disconnect the unit when the time comes to replace the filter. I worry that the security of the connection will diminish each time we do that… I don’t have another solution right now. It’s hard under the sink. The ugly: i will review the WAterdrop faucet at that item but the lack of an adapter to connect to that instead of the cold water main was very disappointing and frustrating. Required two parts to make the conversion, more joints increase risk of leak, but with the compression and reducer adapters, it’s all on. Seems short sighted in my opinion to not even provide options. What would have helped? Oh! Making the housing connection removable to make the connection to the faucet w one part. I realize this filter was not intended for the faucet though… Overall, after the routine frustrations with plumbing changes, it is in, works great, water is good, and it works on our well water. And it’s mostly not plastic. Read more

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★★★★★

Great tasting water

Brian L. PeschJanuary 2, 2026✓ Verified purchase

Easy to install. Improves the taste of the water. A must have to remove contaminants from the water. Read more

★★★★★

Good filtration, fairly easy to install.

Mpls ShopperJanuary 10, 2026✓ Verified purchase

For years I paid someone to replace my sink filter and it cost a lot. I was able to install this myself, and the quality of the filtration is way better. I purchased the stainless steel version and like the looks and it is very sturdy. The water volume is good. I recommend it. Read more

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