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

$ 400.00
Free Shipping USA
Free Shipping USA
Lifetime Guarantee
Lifetime Guarantee
Built in the USA
Built in the USA
The Filters

Tool-Free Filter Changes

When it’s time to change your filters, just screw off the old and screw in the new. It’s that simple. No need to turn off the water with our auto-shut one-way valve heads built into the system.



2,000 Gallon Filter Life

The extended filter life can provide clean and safe water for an average of 12 months before needing to be replaced.


R.O. Quality Water Without the Hassle

Our 3-stage filtration system with Affinity Filtration Technology removes 99.7% of fluoride. And we don’t stop there—our system removes up to 99.9% of 232+ contaminants while keeping in the beneficial nutrients naturally found in water.

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 an average of 99.7% 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.

Stage 2:

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

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.

Customer Reviews
4.9 Based on 68 Reviews
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Nida C.
United States United States
I recommend this product
Easy to install and noticeable results.

I store my Clearly Filtered water in glass bottles in the fridge so I always have extra chilled water ready to drink. The glass bottles take way less time to fill than my old Brita, and they also take up was less space in my fridge. No more bickering with my spouse over whose turn it is to fill the Brita! It’s also great to know that I’m cooking food and rinsing produce with filtered water.

James B.
United States United States
I recommend this product

Installation was 100% easy and took 3 minutes. The water is fabulous.

Scott L.
United States United States
I recommend this product
Easy install great product

Super easy install! Nice product.

Carol R.
United States United States
I recommend this product
Where there’s a will, there’s a way

My sink has no shut-off valve underneath, but a plumber was able to able to cut out a section of copper pipe and install two shut off valves with the filter in between in the basement within 15 minutes. I’ll be able to access the filters easily enough to change them out and now I’m really enjoying purified water from my cold water tap.

Clearly Filtered 3-Stage Under-the-Sink Filter System Review
David B.
United States United States
I recommend this product
Love it!

We used this system for a dedicated feed to a separate ("RO" style) drinking water faucet on the sink. Mainly used just for coffee, cooking and other beverages, so we are happy about this setup. Just wish the replacement filters weren't so pricey.

Clearly Filtered 3-Stage Under-the-Sink Filter System Review
Questions We Get Often
How often should I change my filters?
The Under-the-Sink (UTS) unit 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!
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 99.5%. 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 99.9%.
  • 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 99.9%.
  • 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. It shows the name of the particular contaminant, the concentration before filtration, the concentration after filtration, and the percentage removed.
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.