Drinking Water Filter
Countertop Water Filter

Instantly transforms tap water into healthy, great-tasting water with no installation or permanent fixtures.

CWM water filter

Want more versatility? Our Clean Water Machine comes with a portable pitcher or countertop dispenser. Shop Now

Countertop Water Filter - White is rated 4.5 out of 5 by 1004.
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50% OFF COUNTERTOP WATER FILTERS - limited time!
  • MSRP: 129.99
  • Sale: 64.99

Save 50% + free shipping with Water for Life $64.99

Questions? We can help

  • 866-662-6885
  • MON–FRI: 8AM–8PM CDT
  • SAT: 9AM–5PM CDT

Whole Health

Ultimate Purity*

Instantly transform ordinary tap water into clean, extraordinary water.

NSF Certified Claryum® filtration technology independently tested and proven to remove over 97% of chlorine and chloramines. Also reduces:

  • Heavy metals like lead and mercury
  • Chlorine resistant cysts like giardia and cryptosporidium
  • Organic chemicals like herbicides, pesticides and VOCs
  • Pharmaceuticals like estrone and ibuprofen

For a complete list of contaminants reduced please see our Performance Data Sheet.

Aquasana filters 10 times more contaminants

Whole Health

Ultra Delicious

Claryum®'s selective filtration technology retains naturally occurring beneficial minerals in your water like Calcium, Potassium and Magnesium for healthier, more delicious water!

Whole Health

Eco Friendly

Designed with the environment in mind! Intelligent system design reduces plastic waste by minimizing disposable plastic parts.

Pure Performance

Claryum® Technology

Activated Carbon Reduces pharmaceuticals, herbicides, pesticides, VOCs and MTBE.

Catalytic Carbon Targets chlorine and chloramines.

Ion-Exchange Filters heavy metals like lead and mercury.

Absolute Sub-Micron Mechanical Filtration Captures asbestos and chlorine resistant cysts like cryptosporidium and giardia.

The result: 10x more contaminants reduced than the leading pitcher plus healthy minerals retained for purely delicious filtered water.

Pure Performance

Easily Attaches

No permanent fixtures or installation required. Simply screw on the faucet attachment for filtered water right from your tap! No more big, bulky filters cluttering up your sink space.

Pure Performance

Convenience & Value

Fewer filter replacements. More clean, great-tasting water.

One Aquasana Claryum® filter gives you 11x the capacity of the leading gravity-based pitcher at only 11¢ per gallon with Water for Life.

How It Works

Superior Systems

Selective Claryum® Filtration

Reduces 77 contaminants while retaining beneficial minerals for optimal hydration.

Easy to install, replace & maintain

No permanent fixtures or installation required.

certified by NSF

NSF Certified

Full system tested and certified to NSF/ANSI Standards 42, 53, 401 + P473 for the claims specified on the Performance Data Sheet.

  • 450 gallons
  • 6 month filter life
  • 1 year warranty
  • 90 day guarantee

Help & Support

Video Help

  • How to install the countertop faucet water filter
  • How to replace the AQ-4000-R countertop filters

Installing the countertop faucet system

Replacing the filters in the AQ-4000

Learn More

Read the Reviews

Rated 5 out of 5 by from Excellent water filter I’ve been using Aquasana filters for 10+ years. The under the counter and over the counter filters are both very good, easy to install and easy to use. My friends and family also use them. The water has a crisp, clean, and fresh taste. So delicious!
Date published: 2020-09-19
Rated 5 out of 5 by from I didn't get a new water filter. But my Mother did. I have been using my water filter for numerous years. Fact is I'm on my fourth one. I think so highly of your product I got one for my Mom. She loves it. Thanks for making a darned good product
Date published: 2020-09-12
Rated 5 out of 5 by from Clean water Product was easy to install water Taste great. Family loves it Animals love it we are extremely happy can save money won't have to buy bottled water ever again. I recommend everyone having one in their home. Awesome job Aquasana!!!
Date published: 2020-09-06
Rated 5 out of 5 by from High quality system Hello the filter is great, Its was easy to install and It's very easy to use Thank you, Wendy
Date published: 2020-08-29
Rated 5 out of 5 by from The best water filter system I am very happy with my Aquasana counter top water filter. We have great tasting water all the time. I don’t have to worry about when to change the cartridges because I registered with “Water for Life” so they will mail them to me every 6 months. Installation was very easy, great price, great taste, and best of all, peace of mind as this filter was a great addition to our health. I definitely recommended the Aquasana counter top water filter.
Date published: 2020-08-28
Rated 5 out of 5 by from Was skeptical, pleasantly surprised This was incredibly easy to install and it’s easy to use. I love having filtered water at my fingertips, and we use it several times a day! This is perfect for apartment living. I did use a rubber band to loosely hold the tubing out of the way, but it doesn’t interfere in anything.
Date published: 2020-08-28
Rated 5 out of 5 by from Great price/quality and easy to use Affordable, easy to install and use, and the water tastes great. I love the peace of mind it gives me to have clean, healthy water.
Date published: 2020-08-23
Rated 5 out of 5 by from Easy to install! l have hard water with 3M pollution in the local wells. The water taste is 100% improved, but I also add filtered water to the fridge using a Britta pitcher. Installing was super easy. I just unboxed the filter, removed the old one and its aerator (the hardest part of the process) and attached the new one. I ran water through it for 15 minutes. Done!
Date published: 2020-08-19
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Learn More

Aquasana FAQs

  1. Do I have to pay for a plumber to install the system?

    Our countertop drinking water filter system is very easy to install, and it only takes a few minutes to do; no plumber is necessary. If you have any questions or need assistance, our technical support representatives at 866-662-6885 can walk you through the installation process.

  2. How often do I have to replace the cartridges and how much do they cost?

    We recommend replacing the cartridges after six months or 450 gallons, whichever comes first. Replacement filters cost $59.99, but you can save 15%, get free shipping, and extend your product warranty by signing up for our no-contract auto-ship filter replacement program, Water for Life.

  3. Is this purified water?

    No, and actually, purified water is not as healthy as filtered water. Purified water undergoes reverse osmosis or distillation, which strip everything out of your water - not only the contaminants, but also the healthy, natural minerals. Our system uses selective filtration designed to reduce contaminants from the water and leave in the natural healthy minerals like calcium, potassium, and magnesium.

  4. How do I recycle the replacement filters?

    Our company will recycle the filters for you, but we do not cover the shipping cost to return the filters back to us. In reality, the environmental impact of shipping the filters back to us outweighs the good of recycling. To recycle the AQ-4035 drinking filters yourself, remove the ends of the filters, recycle the plastic parts (which are appropriately numbered) and put the carbon either in your compost pile or garden (carbon is good for plant life), or just throw it out (since the carbon degrades quickly, and is a positive component in a landfill).

  5. I'm a renter, so I can't drill or modify the plumbing. Which filter system should I get?

    The countertop system is perfect for renters because it does not require a new hole in the counter. To install an under counter system, you can remove the existing sprayer or soap dispenser in your rental and install our faucet in its place. This option will not damage or permanently modify your plumbing. When you move out, you can easily remove the system and reconnect your plumbing back to normal.

  6. What size adapters do you send with the countertop system (for the diverter hose)?

    13/16 and 15/16 male.

  7. What size is the chrome collar on the countertop system (on the diverter hose)?

    55/64-27 female.

  8. What does TDS mean?

    TDS is the acronym for Total Dissolved Solids, the amount of dissolved minerals and metals present in water. TDS meters tell you the concentration of dissolved minerals and metals, but are not an accurate measurement for contamination. Aquasana products reduce and remove harmful TDS like lead, but selectively retain or replace healthy dissolved solids like calcium, magnesium, and potassium.

  9. What is BPA? And why are people concerned about it?

    BPA stands for Bisphenol-A, a contaminant found in most plastics. BPA can adversely affect your health if consumed at high levels. Aquasana drinking systems do not contain BPA, and our filtration process reduces existing BPA.

  10. Does having hard water mean it is contaminated?

    Hard water is more of a nuisance than a health risk, and is not necessarily contaminated. Most water sources in the USA are considered hard. Hard water is generally safe to drink, after it has been properly treated.

  11. What is soft water, and is it safe to drink?

    Having soft water just means you have a lower concentration of dissolved minerals in the water (primarily calcium and magnesium). Soft water does not mean clean water. Your water can be soft and still contain contaminants.

  12. What is selective filtration, and how do Aquasana systems filter drinking water?

    Selective filtration is the process of sub-micron filtration, micron filtration, adsorption and ion exchange, all of which selectively reduces chemicals, heavy particulates and most dangerous heavy metals from the water while maintaining healthy minerals like calcium, magnesium and potassium.

  13. How do I know if an Aquasana system will be compatible with my faucet?

    The only faucets the AQ-4000 water filtration system will not be compatible with are the 2-in-1 faucets that have a detachable sprayer at the faucet opening. The AQ-4000 will fit most standard faucets and also comes with two adapters. If your faucet happens to be a non-standard size than the hose connection or adapters that come with unit, you can take your aerator to the plumbing section at your local hardware store and have it measured. After you know the size of your aerator, contact technical support with the size and we will see if we carry the right size adapter, and we will send it to you.

Learn More

User Q & A

Removes rust?

Asked by: john do
Hello, Thank you for your question. The AQ-4000 is NSF Certified Claryum® filtration technology independently tested and proven to remove over 97% of chlorine and chloramines. Also reduces: Heavy metals like lead and mercury https://cdn.aquasana.com/assets/AQ-4000_Performance_Data.pdf?_ga=2.25726133.927680204.1600694812-773233525.1590676156&_gac=1.247744117.1600780583.CjwKCAjwwab7BRBAEiwAapqpTK9F_uyGJH5scBTHS3TtzoqW1ddaO_uU6t1tNtrnnRRv-sG8VhjOHxoCOq4QAvD_BwE If you have any further questions please contact us at 866-662-6885. Thank you, Aquasana Customer Support
Answered by: Aquasana S
Date published: 2020-09-22

Hi, When you get water for life, how long is the extended warranty for.  Thank you

Asked by: fred.sill
Good Morning, Thank you for reaching out to us. Once you have enrolled into our water for life program T has a free sign up and you can cancel at any time. Water for Life ensures you the best discounts with 15% off replacement filters, free shipping and no taxes included. The Water for Life also gives you an extended warranty for the products you purchased, the warranty is for as long as you are enrolled in water for life. Per the extended warranty there’s no cost for warranty replacement parts in the even that your system stops functioning due to damage or wear. A small shipping fee of $4.99 will be applied for warranty parts. If you have any further questions please contact us at 866-662-6885. Thank you, Customer Support
Answered by: Aquasana S
Date published: 2020-09-08

Can you get adapters for different tap attachments? Our tap doesn’t screw from the inside, but the outside. And do you ship to NZ?  Thanks 

Asked by: Sarah Jane
To my knowledge, the unit comes with an adaptor for both inside and outside threads on your faucet.
Answered by: Walt
Date published: 2020-08-06

Can you directly drink the water that's filtered from AQ-4000 or do we still need to boil the filtered water?

Asked by: Jack208
Good Morning, After filtering the water with our system it is safe to drink, no need to boil water. If you need further assistance feel free to contact us at 866-662-6885. Thank you, Aquasana Customer Support
Answered by: Aquasana S
Date published: 2020-07-10

Does it include a filter?

Asked by: Texbbq
Yes it does.
Answered by: Herb Be
Date published: 2020-08-03

I had one of these countertop funits before. After several years the outside of the unit became so brittle it began to break off and eventurally I couldn't get the bottom to open to change the filters. Is the current units made of the same material?

Asked by: Nadine the Goddess
I believe so. The filters can be hard to change. 
Answered by: Porter
Date published: 2020-07-03

Does this come with replacement filter cartridges? Or just the water filter machine?

Asked by: Garcia
The filter unit contains two filters that are used to filter water. It does not come with any extras. It filters approx. 600 gallons.
Answered by: Jakpro
Date published: 2020-06-04

My friend needs a water filter for her kitchen water. She had to return a portable unit that connects to the faucet but her faucet can’t connect to the unit.

Asked by: HalI
Just contact aquasana. She could choose to upgrade to the clean water machine pitcher as an alternate because of the faucet. I have to say that I like the countertop attached to the faucet better than this one. The filter on the machine pitcher does not last as long as the counter attached to faucet. I bought some extra filters for that one. However, the cool part about the counter top machine pitcher is that it will remind you when to change the filter. There are pluses and minuses. Hope you give it a try. I had mine for about 2 years now and it still works well.
Answered by: Derrick K.
Date published: 2020-06-03
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