3-Stage Under the Sink Replacement Filters
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3-Stage Under the Sink Replacement Filters
3-Stage Under the Sink Replacement Filters

3-Stage Under the Sink Replacement Filters

$ 440.00
In Stock - Available now!
Free Shipping USA
Free Shipping USA
Built in the USA
Built in the USA
The Filters

R.O. Quality Filtration—Without The Drawbacks

Filters are powered by a smarter, stronger, and more efficient filtration technology that recognizes what should stay and what should go.

Tool-Free Filter Changes

No need to shut off your water supply or hunt down tools. Replacement filters twist on and off. Plus, all three filters are installed and changed together so you never have to track individual usage.

Built-In Water Shut-Off Valves

Each filter has a leak-proof head and built-in water shut-off valve so there’s never any mess during filter changes.

Rigorously Tested to NSF Standards

Independently tested to NSF / ANSI and EPA standards by accredited labs to guarantee unparalleled protection. We publish performance data publicly so you never wonder what’s in your water.

Extended 2,000-Gallon Filter Life

Proven to perform better longer, no filter change is needed until approximately 2,000 gallons of water have been filtered. Our high-capacity filters last an average of one year for superior performance with minimal maintenance.

R.O Quality Water without the need for a plumber
See Why It's So Good

Unlike typical filter technologies, our breakthrough Affinity Filtration Technology uses 7+ proprietary filtration materials to create multiple stages of filtration that can remove up to 99.9% of 232+ contaminants. This means no need for a plumber, simple easy-twist filter replacement, contaminant removal levels beyond reverse osmosis and no permanent installation. It's a no-brainer!

Stage 1:
Stage 2:
Stage 3:
Stage 1:

Water first passes through a woven, stainless steel mesh screen, which keeps larger particles from entering the filter. Built in the USA.

Stage 2:

Next, water continues through a loose granulated coconut carbon filtration layer, which removes chlorine, bad tastes, and odors. Built in the USA.

Stage 3:

Water then flows through the filter’s composite shell, which is made of 7+ proprietary filtration materials. This dense layer slows down the flow of water and allows for the filter to have more time in contact with the water. The combination of the proprietary breakthrough technology and additional contact time allows for superior removal percentages on all contaminant types. Built in the USA.

Customer Reviews
4.9 Based on 172 Reviews
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Customer Photos
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Filter Reviews:
  • water
  • system
  • faucet
  • installation
  • pitcher
  • filters
  • family
  • sink
  • drinking water
  • water pressure
Rudy A.
United States
I recommend this product

Love it!

Easy to install and very convenient when getting water. I’ve had your container filter for years, but this one is a game changer!

James C.
United States United States
I recommend this product


We had been using two pitchers to keep up with our water demand. Switching to the under sink version is so much better! Installation was simple and quick so we had filtered water coming out of the faucet in just minutes! As much as I loved the pitchers, I do love having my counter space back and the convenience of filling right from the faucet. My property has been inundated with hummingbirds since they lost their habitat to forest fires. 260,000+ acres near me and it has not recovered yet. I fill 15 hummingbird feeders 2-3 times per day to keep up with their demand (not to mention all of the Orioles) and it has been SO MUCH EASIER to use water from the faucet now. The birds much appreciate it, too! So Clearly Filtered is helping the hummingbirds and Orioles too : )

Yvonne D.
United States United States
I recommend this product

Worth it!

The replacement filters were so easy to install. Took a while before my water pressure was back, but overall worth it.

Melissa C.
United States United States
I recommend this product

I can finally stop worrying if I have enough bottled water!

I have a very rare and annoying Flouride filter, so having water without Flouride is not a choice for me. The inside of my mouth/throat gets sores and the skin literally flakes away. I did not know there was a compact filter available that could remove this substance, plus make the water taste great (I’m a water snob after drinking just bottled water for years). This ticks both boxes, and I no longer freak out when I’ve poured the last bit of my last gallon into the coffee maker. Truly a godsend. Thank you!

Renee O.
United States United States
I recommend this product


Install was very easy, less than 5 minutes. Noticeable different in the taste of the water. Lives up to my expectations.

Frequently Asked Questions
How often should I change my filters?
The Under the Sink System (UTS) is built for large quantities of water and will last for up to 2,000 gallons. That milestone is reached at different times according to the number of people using it. Our guidelines are as follows:

Individuals: 15 months
Couples: 12 months
Families: 9 months

All three filters must be changed at the same time. All municipal water supplies are different, so the frequency at which filters need to be changed is always approximate. We recommend making a note of your installation date as a reminder of when to replace the filters or you can sign up for our filter subscription: you’ll never forget to switch your filters and you’ll save 10% on each filter replacement!

*If your tap water is heavily contaminated (most likely if you live in a large or older city), your filter must work harder to keep your water clean, which will decrease the life of the filter.
Which contaminants do the UTS filters remove? (e.g., Fluoride, Lead, Chlorine)
Our filtration technology removes over 230 contaminants. We use an independent, EPA-certified lab to rigorously test our filters to NSF standards. Here are just a few of the more notorious contaminants this filter removes:
  • Fluoride: removed at a rate of 90.7%. It is difficult to remove once it’s added into the tap water and typical carbon-block style filters don’t have fluoride removal capabilities. For that reason we specially formulated our technology so fluoride removal is standard with every filter.
  • Glyphosate: The active ingredient in Roundup® weed killer. Our filters remove >99.9% of this highly controversial chemical.
  • PFOA/PFAS/PFOS: The chemicals that make pans and apparel “non-stick” but are extremely toxic when consumed. Removed at a rate of >99.8%.
  • Lead: Even though it’s been widely banned due to its highly poisonous nature, lead pipes remain in use across all 50 states. Lead is harmful to human health even at low exposure levels and accumulates in the body over time. Removed at a rate of 98.9%.
  • Chlorine: While chlorine is effective at reducing the spread of infectious waterborne diseases, it reacts with naturally-occurring materials in water to form dangerous chemical byproducts that threaten your health. Removed at a rate of >98.6%.
We are all about transparency so we post our full test results on our Test Results Page.
What material are the Under the Sink filters made of?
The Under the Sink (UTS) unit is made with a proprietary blend specifically formulated for Clearly Filtered. These filters are made from a multi-blend of catalysts that remove the contaminants commonly found in municipal tap water giving you and your family convenient, clean, and safe drinking water.

*If your tap water is heavily contaminated (most likely if you live in a large or older city), your filter must work harder to keep your water clean, which will decrease the life of the filter.