3-Stage Under-the-Sink Filter System
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Kitchen Faucet Filter System
3-Stage Under-the-Sink Filter System
3-Stage Under-the-Sink Filter System
The best kitchen faucet filter
Filter system better than Reverse Osmosis
Kitchen Faucet Filter System
3-Stage Under-the-Sink Filter System
3-Stage Under-the-Sink Filter System
The best kitchen faucet filter
Filter system better than Reverse Osmosis

3-Stage Under-the-Sink Filter System

Get Clean and Safe Water, On-Demand

Do you want the same clean and safe water you've come to expect from Clearly Filtered, right out of your tap (Yes, your existing tap)? Our revolutionary 3-stage under-the-sink filtration system is as easy as it gets. Wash vegetables, run pasta water, or fill your coffee maker with peace of mind knowing your tap water will be filtered to remove up to 99.9% of 232+ contaminants.

$ 500.00
Title
Free Shipping USA
Free Shipping USA
Lifetime Guarantee
Lifetime Guarantee
Built in the USA
Built in the USA
30 Day Worry Free Trial
30 Day Worry Free Trial
The System

Quick DIY Installation

Installation takes 15 minutes or less and doesn’t require a plumber. (The record is 2 minutes, 2 seconds using nothing but a wrench and a screwdriver!) Watch the video.

Non-Permanent Installation

Our system filters water that comes through your existing cold water line, so there is no drilling into your countertop or modifications needed to your sink. This makes it a great option for renters and homeowners alike.

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. Watch this video to see just how easy it is.

Slim, Discrete Design

The entire filter system sits flush against the wall and is just 3’’ deep, so you don’t have to sacrifice valuable under-sink space to have clean and safe water.

The Filters

R.O. Quality Water with No Waste

Remove over 230 contaminants and maintain the healthy minerals and nutrients in water, all while never wasting any water down the drain.

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.

100% BPA Free Construction

Braided stainless steel hoses are BPA free. 

99.7% Fluoride Removal

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.

Our Technology Isn’t Just Unique, It’s Unparalleled
How It Works

      

Stage 1: Premium Carbon Priming Filter
Stage 2: Heavy Metal and VOCs Filter
Stage 3: Fluoride and Arsenic Filter
Stage 1: Premium Carbon Priming Filter

Granulated coconut carbon priming filter gets rid of unpleasant chlorine, tastes, odors, cloudiness and colors. Also removes VOCs and other common chemicals from the water. Made in the USA.

Stage 2: Heavy Metal and VOCs Filter

Special-blend stage removes up to 99.9% of heavy metals, pesticides and herbicides and contaminants such as arsenic, lead, chromium, pesticides, herbicides, radiation, PFAS, and much more. Made in the USA.

Stage 3: Fluoride and Arsenic Filter

One of predominant focuses of the filtration technology is the removal of Fluoride from your tap water. Fluoride is removed at 99.5% using our proprietary breakthrough Fluoride removal technology that does not include activated alumina, bone char or through reverse osmosis. 

Check The Stats
How Clearly Filtered Compares
Cost
Installation Difficulty
Power Required
Installation Time / Cost
System Footprint
Fluoride
Lead
Clearly Filtered <br> Under-the-Sink System
Clearly Filtered
Under-the-Sink System
$500
100% DIY
No
10 min / $0
13.75"W x 3.5"D x 16.75"H
99.5%
99.5%
APEC Reverse Osmosis
APEC Reverse Osmosis
$425
Plumber Required
Yes
2-3 hours / $150+
16"W x 16"D x "17H
93.8%
96.8%
Home Master HydroPerfection Reverse Osmosis System
Home Master HydroPerfection Reverse Osmosis System
$592.95
Plumber Required
Yes
2-3 hours / $150+
24"W x 12"D x 17"H
97.7%
99.3%
Clearly Filtered
Clearly Filtered
Filter Life
100 Gallons
Flouride
98.0%
Lead
99.5%
Arsenic
99.6%
Pesticides
99.9%
Bacteria
99.9%
Chromium-6, Pharmeticals, Hormones, Trihalomethanes, Herbicides
99.9%
Brita
Brita
Filter Life
Flouride
No Claim
Lead
No Claim
Arsenic
No Claim
Pesticides
No Claim
Bacteria
No Claim
Chromium-6, Pharmeticals, Hormones, Trihalomethanes, Herbicides
No Claim
Soma
Soma
Filter Life
Flouride
No Claim
Lead
No Claim
Arsenic
No Claim
Pesticides
No Claim
Bacteria
No Claim
Chromium-6, Pharmeticals, Hormones, Trihalomethanes, Herbicides
No Claim
PUR
PUR
Filter Life
Flouride
No Cliam
Lead
99.5%
Arsenic
No Claim
Pesticides
92.6%
Bacteria
No Claim
Chromium-6, Pharmeticals, Hormones, Trihalomethanes, Herbicides
No Claim
*Information for this chart was compiled from manufacturer websites and brochures. February 2017.
3-Stage Under-the-Sink Review - image of system under a sink
5 stars
Love It!

Love my under sink filter system! It was super easy to install and I love the taste of the water, super clean! I was prepared for the reduced water pressure, but I can barely tell...

Kirstin G.
Verified Buyer
Best Under Sink Filter System - Fluoride, Lead, PFAS
5 stars
Fabulous filter

Took my husband about 5 minutes to install the filter. Love knowing my tap water is safe to drink and washing veggies and fruit using pure water is very comforting. No more chlorine smell! Already had the pitcher and now the under the counter filter system. Thank you!

Kerry C.
Verified Buyer
Under Kitchen Sink Filter - Clearly Filtered
5 stars
Best Filter Ever

I have used the under sink filter for a couple of years now and the filters have performed flawlessly. I am now on my second set of filters with no plan of ever buying anything but these filters. Clearly Filtered has changed the game when it comes to providing clean drinking water. I love knowing that the water I am drinking is safe and only contains the things my body needs.

Steven S.
Verified Buyer
5 stars
Excellent!

The under sink unit arrived today and installation was straightforward and simple. It doesn't take up much space and the water tastes even a bit better than the CF pitcher which is excellent already. Water flow is decreased a small amount as you describe, but any filter system will do that. It's great running it through the existing tap without having to install a separate spigot and call a plumber, and changing the filters in a year will be a breeze. Glad to be on the VIP program as well. Thanks for a well-thought-out and well-designed product. Keep up the good work.

Martin
Verified Buyer
Customer Reviews
4.9 Based on 82 Reviews
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Filter Reviews:
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DB
10/06/2020
David B.
United States United States
I recommend this product
Now I know what’s NOT in my water

We loved the pitchers but this is significantly more efficient in providing purified water. And it’s coming straight from the faucet.

Clearly Filtered 3-Stage Under the Sink Replacement Filters - VIP Review
LA
10/06/2020
Laura A.
United States United States
I recommend this product
Three Stage Under the Sink Filter

This filter is amazing! Installation was quick and easy, and I now have delicious pure water for drinking, cooking, and for our dogs. It’s wonderful to not have to replace the filters for such a long time. They will be shipped to me on a pre-arranged schedule, so I’ll remember when to change them. Thank you!

JG
10/05/2020
Josh G.
Canada Canada
I recommend this product
Easy to Use Easy to Attach

The Clearly Filtered filter was so easy to set up. It is efficient, and now keeps the water coming from my tap clear of undesirable compounds. I'm happy with my purchase.

A Clearly Filtered Customer
GB
09/21/2020
Ginny B.
United States United States
I recommend this product
Worth it!

The filter did make our cold water pressure reduced as they say but our water pressure in the kitchen ****** to begin with. Still completely worth it. Super easy to install and the non fluoride and peace of mind makes it one of the best filters around. Plus it tastes great. Water delivery companies are so expensive so just go with this... What are you waiting for?

SD
09/15/2020
S D.
United States United States
I recommend this product
Very Easy Installation for Clear Water

I found attaching the unit to my cold water pipe to be very easy. After that, the filter has worked very well with clean and clear water.

Questions We Get Often
How do I install the Under-the-Sink system?
The initial set up is a piece of cake. All you’ll need are the instructions, a pencil, two wrenches, the two screws that came with it, and a drill. If you’d prefer to use video instructions, you can find them here.

After taking the system out of the box, the first thing you will need to do is look under your sink and turn off the cold water valve. Simply turn the valve clockwise to turn it off. Double check that it’s off by trying to turn the cold water on at the faucet. Note that the hot water will still be working.

There may be a little residual water left in the line so before starting the next step place a towel below the cold water valve. Use one of the wrenches to unscrew the cold water line from where it connects to the cold water valve. The UTS system has two lines with a different fitting on each side. For this step, take the line with the female fitting, attach it to the cold water valve, and tighten with a wrench.

Now, take the line with the male fitting and attach it to the line coming from the faucet. Again, use a wrench to tighten it, but this time you may need two wrenches to keep the nut from slipping.

It isn’t necessary to mount the system—it will work perfectly just standing on its own—but if you’re short on space under your sink, mounting it can help you save quite a bit of space. First, place the system against the wall where you are going to mount it. Use a pen or pencil to mark the eyelets so you’ll know where to drill the screw into the wall. Be sure to leave enough room below the filters to replace them when the time comes.

Next, set the system down and drill a screw into each of the two marks you made. Then, use the eyelets on the system to hang it on the screws. Secure it by sliding it to the left or right.

Finally, turn the cold water valve back on by turning it counter-clockwise. That’s it! Now just sit back and enjoy the peace of mind knowing you are drinking clean and safe water directly from your faucet.
How long do the filters last?
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!
How big is the Under-the-Sink system? What size are the fittings?
The Under-the-Sink (UTS) unit is both large enough to remove contaminants from large quantities of water and compact enough to fit neatly under your sink. An image with the exact dimensions is below. The fitting on the intake line is female ⅜” compression. The fitting on the output line is male ⅜” compression. UTS dimensions
Which contaminants does the UTS system 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.