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
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

470 reviews

3-Stage Under the Sink Water Filter System

$550.00
$550.00

Powered by Affinity® Filtration Technology

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Future Filter Refills: $409.50 delivery every 9 months
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Product Details

Transform Your Sink Into The World’s Best Water Filter

This sleek space-saver under-sink water filtration system hides underneath your sink to give you proven protection from hundreds of dangers, including chlorine, fluoride, lead, & PFAS. Easy to install and maintain, simply flip on your faucet to enjoy clean drinking water and safe, filtered water to cook with and clean with.

Material 100% BPA-Free
Fitting Size 3/8 inch stainless steel braided lines
Size/Dimensions 15 x 3.1 x 15.4
Weight 6.9lb
Length of braided water lines 30 inches
Intake Female 3/8 inch npt compression
Output Male 3/8 inch npt compression


Designed for use with municipal (or tap) water
Designed for your cold water line
Designed and warrantied for use with standard residential water pressure (~60 psi)
Shipping & Returns

We offer a 100% Satisfaction Guarantee for the first 30 days after purchase. If for any reason you are not in love with your new Clearly Filtered product, you can exchange or return it for a refund. Shipping fees are non-refundable.

Orders take 1-3 business days to process (Monday-Friday, excluding holidays).

Domestic Shipping: Free Shipping for all autoship orders in the USA. Shipping rates apply for one-time purchases. You should receive your shipment 5-10 business days after your order has been processed. 
Warranty

In order to assure the highest quality standards possible, each order is inspected for defects prior to shipping. This makes defects incredibly rare. However, if you feel that the item is defective, it may be eligible for replacement if we determine it is due to faulty workmanship or materials. Clearly Filtered offers a limited lifetime warranty.
13 of 32 contaminants exceed EWG health guidelines

Contaminants

Exceed EWG health guidelines

32 Total Contaminants in Your Water

25 Removed by Clearly Filtered

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Water provider
Mountain Regional Water Special Service District
Population affected
9,500
Data available
2021-2023
Water source
Surface water

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  • Discover the contaminants in your tap water
  • Learn about the health risks associated with those contaminants
  • Get personalized product recommendations

Public water supplies are tested regularly to ensure tap water meets the standards set by the U.S. Environmental Protection Agency (EPA), as well as state and local regulations. This free U.S. database compiles all of these test results to reveal exactly what’s in your water. Enter your zip code to see the specific contaminants in your tap water, how they can affect you, and how to best protect yourself and your family.
3-Stage Under the Sink Water Filter System 1

3-Stage Under the Sink Water Filter System

Every 9 Month Filter Subscription
$550.00
$550.00
Every 9 Month Filter Subscription
$550.00
$550.00
Free US Shipping + 10% Off HSA/FSA eligible

PROTECTION FROM OVER 232+ CONTAMINANTS

Give Your Family Peace of Mind

ACTIVELY PROTECTING YOU FROM:

Heavy Metals Including Lead & Arsenic

Lead is linked to developmental delays and lowered IQ in children, kidney damage, and high blood pressure in adults. Arsenic is classified as a known human carcinogen. There's no safe level of exposure.

Forever Chemicals Such as PFAS, PFOA, PFOS

So-called "forever chemicals" don't break down in the environment or in your body and accumulate over a lifetime. They've been linked to numerous cancers, diseases and fertility issues. Standard carbon filters can't remove them.

Fluoride & Trihalomethanes

Excess fluoride is associated with dental and skeletal fluorosis, with emerging research raising questions about cognitive effects in children. Trihalomethanes are a group of cancer-linked disinfection byproducts legally allowed in drinking water in all 50 states.

Key Features & Benefits

Removes up to 99.99% of 232+ contaminants

Targets chlorine, fluoride, lead, PFAS & more, without removing beneficial minerals
Compatible With Any Sink

No separate or second faucet required
100% DIY Installation

All you need is a wrench
Extended Filter Life

Filters last one year on average
Built in the US

BPS/BPA-free medical-grade materials

HOW IT WORKS

3 Unique Filters, 1 Complete System

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Advanced Priming Filter - Your First Line Of Defense

This sophisticated coconut carbon pre-filter minimizes sediment and targets common contaminants like chlorine and other chemicals that affect taste and smell. While most standard filters stop here, our advanced technology goes a step further, offering additional layers of protection against invisible threats.

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Affinity® Filtration Technology

Powered by the world’s most advanced filtration technology

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2 Cutting-Edge Components

A dynamic water pathway + a powerful blend of superior absorption materials join forces to produce the cleanest, safest, and healthiest water possible.

6 Advanced Medias

Our proprietary blend of filtration materials captures many more contaminants than ordinary filters by ionically binding and extracting contaminants as water moves through the filter.

360-Degree Protection

Goes beyond taste and smell to protect your health by targeting hidden dangers linked to cancer, bone disease, reproductive issues, & more.

4.8
Rated 4.8 out of 5 stars
Based on 470 reviews
97%would recommend this product
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470 reviews
  • WK Profile picture for William K.
    William K.
    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, Pesticides, Pharmaceuticals, PFAS
    Rated 5 out of 5 stars
    1 week ago
    Tap Water Hasn't Tased This Good Since 1975

    After installing the ClearlyFiltered 3-Stage Undersink Water Filter System and purging it for 15 minutes... the TAP water in California tastes like it once did back before 1985. Absolutely PURE!

    This is a very Fantastic Water Treatment system and it took me about 20 minutes to install it.

    100% WOULD Racommend

    Was this helpful?
  • RH
    Robert H.
    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? Pesticides, PFAS, Heavy Metals, Pharmaceuticals, Lead
    Rated 5 out of 5 stars
    1 week ago
    Exceptional design and Performance

    The three stage under the sink water filter is convenient and easy to install. I purchased it to not only target 13 chemicals that are not removed by my city tap water filtration system but other carcinogens and forever chemicals as well. The design is excellent with only a slight reduction in pressure on the cold water supply. Great buy. Great value!

    Was this helpful?
  • RS
    Rebecca S.
    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? Pesticides, Fluoride, Heavy Metals, PFAS
    Rated 5 out of 5 stars
    2 weeks ago
    Best way to filter water!

    My husband and I absolutely love the clearly filtered under the sink system! We’ve used things like a berkey, and brita and it’s so annoying to refill containers. I love that my kitchen sink can just give me filtered water that’s safe to drink or cook with and also easy to install on our own

    Was this helpful?
  • JM
    Jimmie M.
    Verified Buyer
    I recommend this product
    Age Range 65+
    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, Lead, Fluoride, Pesticides
    Rated 4 out of 5 stars
    2 weeks ago
    New filter

    Just had it installed so can't say how it works yet. Is bigger than expected takes up good amount of under the sink room.

    Was this helpful?
  • JB
    Joseph B.
    Verified Buyer
    I recommend this product
    Age Range 55 - 64
    How Many People Are In Your Household? 1
    Where Is Your Water Sourced? Municipal Tap Water
    Which Contaminants Are You Most Concerned About? Lead, Pesticides, Pharmaceuticals, PFAS, Heavy Metals
    Rated 5 out of 5 stars
    3 weeks ago
    Works great

    Easy to install, chlorine smell eliminated, water pressure decrease is noticeable but exceptable.

    Was this helpful?

Frequently Asked Questions

  • The under-sink filtration system removes up to 99.99% of over 232 contaminants. Some of the contaminants it targets include:

    • Chlorine: Can produce harmful disinfection byproducts.
    • Lead: Linked to learning disabilities and nervous system damage.
    • Fluoride: Overexposure can cause bone and dental issues.
    • PFAS/PFOA/PFOS: Known as "forever chemicals" and linked to numerous health concerns including cancer.
    • TTHMs: Byproducts linked to various cancers.
    • Chromium 6: A heavy metal linked to liver damage and cancer.

  • The filters are replaced according to household size:

    • 4+ people: Every 9 months
    • 2–3 people: Every 12 months
    • 1 person: Every 15 months

    All three filters have the same lifespan, so they are installed and changed together. Hard or highly contaminated tap water and heavy usage may require more frequent replacements.

  • Affinity® Filtration Technology is described as stronger, smarter, and more efficient than most Reverse Osmosis systems. It intentionally does not target healthy minerals, and the system does not produce excess wastewater or "dead" water.

  • Cold water flow may be reduced by 25–35% to provide high-quality filtration. Because the system is optimized for cold water, it does not affect hot water pressure or flow rate.

  • The system measures 15 inches in height, 3.1 inches in depth, and 15.4 inches in width. It is designed to fit under most sinks, works with most standard ⅜-inch water lines, and weighs 6.9 pounds.

  • Affinity® Filtration Technology produces clean, safe water that is described as neither too acidic nor too alkaline, while retaining a pleasant, chlorine-free taste. The source contrasts this with some filtration methods, including Reverse Osmosis, which can produce water with a flat, dull, or "dead" taste.

  • Turn off the sink's cold water supply by twisting the handle beneath the sink. Connect the system between the water line and valve, then place or mount it under the sink using the provided kit.

    Want a visual guide? Watch our short installation tutorial here.