3-Stage Under the Sink Water Filter System
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3-Stage Under the Sink Water Filter System
3-Stage Under the Sink Water Filter System
3-Stage Under the Sink Water Filter System
3-Stage Under the Sink Water Filter System
3-Stage Under the Sink Water Filter System
3-Stage Under the Sink Water Filter System
3-Stage Under the Sink Water Filter System
3-Stage Under the Sink Water Filter System
3-Stage Under the Sink Water Filter System
3-Stage Under the Sink Water Filter System
3-Stage Under the Sink Water Filter System
3-Stage Under the Sink Water Filter System

3-Stage Under the Sink Water Filter System

Rated 4.9 out of 5
Based on 175 reviews
$ 550.00

Shipping, Returns, and Warranty

We offer a 100% Satisfaction Guarantee for the first 90 days after purchase. If for any reason you are not in love with your new Clearly Filtered product, you can return it for a refund. Return shipping is the responsibility of the customer and will be deducted from your refund.

Orders take 24–48 business hours to process (Monday - Friday, excluding holidays).

Domestic Shipping: Free Shipping in the USA. You should receive your shipment 5-7 business days after your order has been processed. Orders valued at $300 USD + will require a signature at delivery.

The Most Powerful Under-Sink Water Filtration System On The Planet

Worried about your tap water? Typical sink filtration systems either remove too few contaminants, leaving you vulnerable to illness, disease, and other dangers pouring from your faucet… or targets beneficial minerals. Our advanced under-sink filtration system removes 232+ contaminants including heavy metals, pollutants, and chemicals. Upgrade to Clearly Filtered today to enjoy clean water from any existing faucet—no plumber, tank, or extra faucet required.

What Sets Our Under-Sink Water Filter System Apart

  • Removes 232+ contaminants. That’s more than most Reverse Osmosis (RO) systems.
  • Compatible with any sink. Connects directly to your cold water line.
  • Easy installation process. Do it yourself in 15 minutes or less. 
  • Portable, space-saving design built for homeowners and renters alike. 
  • Minimizes waste. 75% more efficient than typical RO systems. 
  • 2000-gallon filter life. Most customers change the filters just once a year.
  • Minimal maintenance. Twist-on, twist-off replacement filter cartridges.
  • Proven to perform. Tested by third-party labs.
  • Built in the USA with high-quality filters. 
Free Shipping USA
Free Shipping USA
Limited Lifetime Warranty
Limited Lifetime Warranty
Built in the USA
Built in the USA
30 Day Worry Free Trial
30 Day Worry Free Trial
The System

DIY Installation In 15 Minutes or Less

No plumber or power tools required. All you need is a wrench.

Built For Homeowners and Renters

The system can be mounted horizontally, vertically, or simply leaned up against the wall. Filter performance is not dependent on placement or orientation.

Sleek, Space-Saving Design

The system sits flush and is just 3’’ deep. It doesn’t command any countertop space nor require excess space underneath your sink. Plus, no separate tank, drum, or extra faucet is needed.

Compatible With Any Sink

Connects directly to your cold water line, no matter the material. Can be used with any sink (kitchen sink, bathroom sink, etc.) to provide clean water for drinking, cooking, cleaning, and more.

No Wastewater, Dead Water, Or Remineralization

Unlike typical Reverse Osmosis systems, our advanced under-sink system ensures there is never any excess wastewater, tasteless “dead” water, or the need to remineralize drinking water after filtration.

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.

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

Every system includes three replaceable filters developed with our advanced Affinity Filtration Technology. Each of the three filter cartridges serves a unique purpose as they work together to give you easy access to clean water from any faucet.

Stage 1: Advanced Priming Filter
Stage 2: Heavy Metal + VOCs Filter
 Stage 3: Built-In Fluoride Filter
Stage 1: Advanced Priming Filter

This sophisticated coconut carbon pre-filter minimizes sediment and particles with various micron sizes to prime water for advanced filtration in Stages 2 and 3. The hazards extracted here impact color, odor, and water tastes, so you can see, smell, and experience the difference.

Stage 2: Heavy Metal + VOCs Filter

Built to eliminate hidden heavy metals, herbicides, pesticides, and more, this advanced filter removes the covert chemicals and contaminants that most miss including lead, radiation, chromium, and PFAS.

Stage 3: Built-In Fluoride Filter

The breakthrough technology inside this filter removes superior levels of fluoride without relying on typical Reverse Osmosis technology that blindly removes beneficial minerals and produces excess wastewater.

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
15"W x 3.1"D x 15.4"H
90.7%
98.9%
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%
Standard Carbon Filter
Standard Carbon Filter
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. August 2022.
3-Stage Under-the-Sink Review - image of system under a sink
5 stars
Worth every penny!

I absolutely love this filter. It's super easy to install and the water tastes great. I was happy I did not experience a loss of water pressure... Overall I'm a very happy customer .

Winter G.
Verified Buyer
Best Under Sink Filter System - Fluoride, Lead, PFAS
5 stars
Easy & Clean

Installing my Clearly Filtered 3-Stage Filtering System was very easy to install in my apartment sink. Now I don't refill filter pitchers 10 times a day, Yay! It’s portable too should I move again so definitely worth the investment... The water tastes clean and has simplified my kitchen routines, plus I know I’m drinking good water.

Clif J.
Verified Buyer
Under Kitchen Sink Filter - Clearly Filtered
5 stars
Just what I have been longing for!

I have been wanting a filtering system for a very long time, but couldn’t decide on which one to get. After researching for nine months, I decided on Clearly Filtered and couldn’t be happier. Installation was truly a breeze. Having delicious, CLEAN water instantly is what everyone wants and now we have it...

Kathy B.
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
average rating 4.9 out of 5
Based on 175 reviews
  • 5 Stars
    162 Reviews
  • 4 Stars
    10 Reviews
  • 3 Stars
    3 Reviews
  • 2 Stars
    0 Reviews
  • 1 Star
    0 Reviews
98% of reviewers would recommend this product to a friend
Customer photos and videos
175 Reviews
Reviewed by Paul T.
Verified Buyer
I recommend this product
Age Range
65+
How Many People Are In Your Household?
2-3
Where Is Your Water Sourced?
Well Water
Which Contaminants Are You Most Concerned About?
  • PFAS
  • Pharmaceuticals
Rated 5 out of 5
Review posted

Better tasting

Removal of arsenic

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Reviewed by Jeff S.
Verified Buyer
I recommend this product
Age Range
55 - 64
How Many People Are In Your Household?
2-3
Where Is Your Water Sourced?
Municipal Tap Water
Which Contaminants Are You Most Concerned About?
  • Fluoride
  • Heavy Metals
  • Pharmaceuticals
Rated 5 out of 5
Review posted

Water filtration system

So far so good, very easy installation. I actually will be purchasing two more one for my son and one for my daughter. Thanks again for everyone’s help.

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Reviewed by William Q.
Verified Buyer
I recommend this product
Age Range
65+
How Many People Are In Your Household?
2-3
Where Is Your Water Sourced?
Municipal Tap Water
Which Contaminants Are You Most Concerned About?
  • Lead
  • Heavy Metals
Rated 5 out of 5
Review posted

Billy Q

Great product

Easy to install

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Reviewed by Samantha M.
Verified Buyer
I recommend this product
Age Range
26 - 34
How Many People Are In Your Household?
2-3
Where Is Your Water Sourced?
Municipal Tap Water
Which Contaminants Are You Most Concerned About?
  • Fluoride
  • Pesticides
  • PFAS
  • Radiation
  • Heavy Metals
Rated 5 out of 5
Review posted

Peace of mind

Amazing filter system. Incredibly easy installation for renters or owners alike. We were using a RO system to filter the water previous to this system, which is better than nothing at all but reminerilizing is tedious and gets a tad annoying. Would definitely recommend.

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Reviewed by Nancy H.
Verified Buyer
Age Range
55 - 64
How Many People Are In Your Household?
2-3
Where Is Your Water Sourced?
Municipal Tap Water
Which Contaminants Are You Most Concerned About?
  • Heavy Metals
Rated 3 out of 5
Review posted

Where’s the pressure???

This is probably an inevitable consequence, but the

decrease in water pressure is our only complaint.

So happy not to have to fill the pitcher.

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Reviewed by Mia P.
Verified Buyer
I recommend this product
Age Range
45 - 54
How Many People Are In Your Household?
4+
Where Is Your Water Sourced?
Municipal Tap Water
Rated 5 out of 5
Review posted

Love it!

I did quite a bit of research before I decided on this under sink filter. The extra investment is worth the peace of mind knowing the filter is taking out so many toxins but convenient because I don’t have to worry about demineralization. Installation was easier than I thought it would be and reduction in water flow is a non-issue in our home - I love that I didn’t need a separate faucet. One of the best purchases I have ever made. Thank you!

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Reviewed by Joella B.
Verified Buyer
I recommend this product
Age Range
55 - 64
How Many People Are In Your Household?
2-3
Where Is Your Water Sourced?
Municipal Tap Water
Which Contaminants Are You Most Concerned About?
  • Fluoride
  • Heavy Metals
  • Pharmaceuticals
Rated 5 out of 5
Review posted

Makes Drinking Healthy Easy

Also easy to install!

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Reviewed by Charles N.
Verified Buyer
I recommend this product
Age Range
55 - 64
How Many People Are In Your Household?
2-3
Where Is Your Water Sourced?
Municipal Tap Water
Which Contaminants Are You Most Concerned About?
  • Lead
  • Heavy Metals
  • Pesticides
  • Pharmaceuticals
  • PFAS
Rated 5 out of 5
Review posted

Clean Tasting Water

The system is fantastic. NYC water can have a not so satisfying taste because of either the old pipes or the residual treatment. Only negative is that the water pressure at the faucet decreased, but still enough to quickly fill a glass.

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Reviewed by Rachael M.
Verified Buyer
I recommend this product
Age Range
26 - 34
How Many People Are In Your Household?
1
Where Is Your Water Sourced?
Municipal Tap Water
Which Contaminants Are You Most Concerned About?
  • Heavy Metals
  • Radiation
Rated 5 out of 5
Review posted

Great!

I live in an apartment and this was very easy to install. It was a lot bigger than I thought. Water was not very hydrating to me lately and a Brita was just not cutting it. When I installed this I instantly noticed how much lighter the water felt and smooth when drinking. I did a taste test and it removed the metallic taste from the water. The cold tap does flow a little slower but it’s worth the trade in my opinion. After first installment, Even after 5-10 minutes the water had that initial new taste from the filter and was cloudy. So I did some dishes until it cleared up and I think that helped.

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Reviewed by Harry K.
Verified Buyer
I recommend this product
Age Range
65+
How Many People Are In Your Household?
2-3
Where Is Your Water Sourced?
Municipal Tap Water
Which Contaminants Are You Most Concerned About?
  • Fluoride
  • Lead
  • Heavy Metals
  • Pesticides
  • Pharmaceuticals
Rated 5 out of 5
Review posted

Clearly different.

Compared to the last water filter I had, I'm feeling more confident that Clearly Filtered is doing its job judging by taste and appearance of the ice. I have a designated faucet for the filtered water and the water pressure has greatly improved. Installation was easy and it fits neatly under the sink. I like that you claim to filter out flouride which is important to me but found very few products that do that. I also like that you offer a 90 day return policy. Short of having my water lab tested, I am very satisfied with this product.

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Tech Specs
Material
100% BPA Free
Size/Dimensions
15 x 3.1 x 15.4
Fitting Size
3/8 inch stainless steel braided lines
Weight
6.9lb
Filter
3-Stage Under the Sink Replacement Filters
Filter Life
2,000 Gallons*
Warranty
Limited Lifetime Warranty
Frequently Asked Questions
What contaminants does your under-sink filtration system remove?
Typical filtration systems leveraging only activated carbon or a carbon block filter remove as few as 5 contaminants from drinking water. Our under-sink filtration system has been tested and certified to remove up to 99.9% of 232+ contaminants including fluoride, PFAS, lead, Chromium 6, pharmaceuticals, chloramine, and arsenic. This includes covert contaminants missed (and introduced) during the water treatment process.

To see every contaminant reduced and removed, click here to view the latest performance data.

How do I install the system?
The system can be connected to any sink throughout your whole house. All you have to do is shut off the cold water supply beneath the individual sink, then connect the system to the cold water line and valve. Once connected, you have the option to mount the system with the included screws and bracket—or simply let it sit beneath your sink.

If you’d like to see how quick and easy installation is, check out the short video tutorial linked here.

How long do the filters last?
The included filters, and all replacement filters, have an extended 2000-gallon filter life. The majority of customers install replacement filters just once a year.

Here is a typical replacement schedule:

4+ people: Replace filters every 9 months

3-4 people: Replace filters every 12 months.

1-2 people: Replace filters every 15 months.

To make upkeep as easy as possible, all three filters have the same lifespan. Therefore, they are installed and changed together. Simply twist off the old filters, then twist on the new filters.

Save 10% on replacement filters by enrolling in our free filter subscription service when you purchase your under-sink filtration system.
How does this compare to Reverse Osmosis systems?
The bottom line is that Affinity Filtration Technology is stronger, smarter, and more efficient than standard filtration technology and most Reverse Osmosis systems like Aquasana, APEC, Ispring, and more. Our intelligent technology does not target beneficial minerals, so there’s never any excess wastewater, tasteless “dead” water, or the need for remineralization. Plus, it does not require a bulky water drum, tank, or extra faucet.
How does this compare to water softeners?
Water softeners do not remove contaminants from water. They strictly soften it. Therefore, they do not improve water quality, safety, or cleanliness.
How does the system affect water flow and water pressure?
Superior filtration requires increased contact time with water. Therefore, cold water flow can be reduced up to 25% to ensure the toughest contaminants are extracted. Since the system is constructed to filter cold water, it does not affect the water pressure or flow rate of warm water.
How big is the system? What are its dimensions?
The system is 15” tall, 3.1” deep, and 15.4” wide. Its slim, space-saving design ensures it effortlessly fits under any sink without taking up any excess space.

It is compatible with standard water lines; the majority of which are ⅜-inch stainless-steel, and the lightweight system is just 6.9 pounds.
How does it affect water taste?
Distillation, demineralization, and reverse osmosis tend to result in soft, acidic water with a flat, dull, or “dead” taste. On the other hand, our advanced filtration technology results in clean, high quality, and safe water that’s not too acidic nor too alkaline to retain a pleasant, chlorine-free taste.

*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.