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 4.6 out of 5 by 962.
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  • MSRP: 114.27

Save 20% + free shipping with Water for Life $91.42

Questions? We can help

  • 866-662-6885
  • MON–FRI: 8AM–7PM 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 9 years of Aquasauna When my wife graduated college the first thing she wanted to do was buy a nice water filter for our home and upgrade our air filtration. I obliged and we bought the aquasana countertop system which we have had now for almost 10 years. It's fantastic and we love it. We also use their shower system and our family loves having soft hair and normal skin that's not too dry from all the chlorine.
Date published: 2019-07-06
Rated 5 out of 5 by from Finally, water that tastes good! I live in a city that supposedly has great tasting water - and most of it does! But for some reason, at my house, the water intermittently tastes awful! I have tried other filters (both pitcher and under sink), but had resorted to drinking bottled water because none of them worked. I decided to give the Aquasana countertop filter a try. It was easy to install, and now I have finally have great tasting water. I've had it more than a month, and it has been consistently tasty. I now keep a 2-liter bottle in my refrigerator full of water that I got through my filter, and so I have cold, delicious water available any time I want it without having to keep buying disposable bottles.
Date published: 2019-06-06
Rated 5 out of 5 by from Works as Promised Did my research and only one of a few shown to take on PFAS in the water. Works as promised, very easy to install. Happy with the product so far.
Date published: 2019-05-20
Rated 5 out of 5 by from So far, so good. Easy to install. Water quality is better than using one of the pitcher type filters. The filter doesn't take up too much space.
Date published: 2019-05-12
Rated 5 out of 5 by from Quality product, easy install Water filter was easy to install on my existing faucet. So far, it seems like everything is working fine and water tastes great! I wish the tube connecting to the faucet to the filter unit was longer, but otherwise, I am very pleased with my product.
Date published: 2019-04-29
Rated 5 out of 5 by from Aquasana counter top water filter I really like this filter system it fits on my counter and doesn't take up much room. My water is fresh and clean and tastes great. No more rust taste!!!!
Date published: 2019-04-11
Rated 5 out of 5 by from Water tastes good Super simple to install and the water tastes great
Date published: 2019-03-12
Rated 5 out of 5 by from Great ware from a great product This product installed easily. The quality of the water surpasses anything I have used before to include high-priced bottled water. The taste is superb, and the water is crystal clear and clean. With changing the filter every six months, I went from $50 per month for bottles water to $10 per month for Aquasana water. I also got the filtered drinking canister for work, and it does a great job too.
Date published: 2019-03-03
Rated 5 out of 5 by from BEST COUNTER TOP FILTER I EVER OWNED! I have been using this model filter since about 2005. The water tastes great and I always feel confident my family is getting not only great tasting but healthy water!I use it to make iced tea, homemade soups, ice cubes, etc. Everything tastes better with filtered water. And I don't have to carry heavy cases of bottled water into my house and I'm not putting plastic bottles in the landfills which makes me feel more Green. It's a Win/Win situation!
Date published: 2019-02-01
Rated 5 out of 5 by from Will always have this countertop unit! The simplest to install. Make a tremendous difference in taste of water. Easy filter changes if you use the proper sized metric box end wrench. Easy leak stoppage with same wrench. Been using for many, many years. Aquasana would do well to include in the instructions the information about using the correct metric box end wrench or socket
Date published: 2019-01-27
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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

I put hot water thru my filter by mistake .just a litre of medium hot tap water .will that have ruined my filter.

Asked by: Hot water
Hello, Thank you for contacting us. While we certainly do not suggest running hot water through the system, a brief hiccup like this wont destroy the filter. You can continue using the system, just try to ensure that you avoid running hot water through the system going forward.   Please let us know if you have any other questions!  Thank you, Aquasana Customer Support
Answered by: Aquasana S
Date published: 2019-07-03

My Aquasana 4000a from yesteryear has a pre stage filter built into the diverter line. Why is there no prestige in the current Aquasana Countertop system ?

Asked by: RobertW
Hello, It appears you have several questions that would best be answered by a consultation with one of our experts over the phone. Please call our sales department at 866-662-6885, options 1 and 1 to discuss a potential solution for your home. Thank you, Aquasana Support
Answered by: Aquasana S
Date published: 2019-06-05

Does it filter out PFAS chemicals?

Asked by: bigblu
Hello, PFOS AND PFAS, that you find in scotch guard or teflon in cookware. All of our drinking systems are NSF Certfiied for the removal of PFOS and PFAS. You can find it on the Performance Data Sheets that I have attached in this email. https://cdn.aquasana.com/assets/AQ-5300+_Performance_Data.pdf?_ga=2.216480470.1554762986.1557852706-1576935854.1541435505 Please let me know if I can further assist. Thank you,
Answered by: Aquasana S
Date published: 2019-05-15

do you ever need to replace hoses for the countertop model? ive had mine for 4yrs now .

Asked by: john fletcher
I believe it depends on your usage and the temperature in your area and lighting. If you use it often enough, you don’t need to clean the tubes. However, if you live in a warm area, I suggest changing it every 2-3 years. 
Answered by: Derrick K.
Date published: 2019-05-12

How can I get a replacement countertop device? One of my filters is stuck inside.

Asked by: Skyblue
Hello, It appears you have several questions that would best be answered by a consultation with one of our experts over the phone. Please call our customer service department at 866-662-6885, to discuss a potential solution for your home. Thank you, Aquasana Support
Answered by: Aquasana S
Date published: 2019-04-30

Do these filters remove  perfluoroalkyls (PFAS)?

Asked by: FrankG
Hello, Thank you for contacting us. PFOS AND PFAS, that you find in scotch guard or teflon in cookware. All of our drinking systems are NSF Certfiied for the removal of PFOS and PFAS. You can find it on the Performance Data Sheets that I have attached in this email. Please contact us at 866-662-6885 to help further assist. Thank you, Aquasana Support
Answered by: Aquasana S
Date published: 2019-04-29

My countertop filter has been getting stuck on the on position after turning off the water source. If I forget to push the knob back in it will continue filtering the next time I turn my faucet on. Any ideas why?

Asked by: Stephylace
the same happened to me!. The countertop faucet is very low quality. there is a plastic lever in it , that wore out just by regular use. I tried to get an answer from aquasana, but they are good only at taking your money. Since, i have switched to Filtrette. it is so much better,
Answered by: Never Aquasana Again
Date published: 2019-04-18

How to install it.   Any instructions 

Asked by: Gman
It comes with easy to read installation instructions. Make sure to look at the pictures, too, and install the filters in the right direction. (one is nob up, the other is nob down) -- There should be no problem.
Answered by: Retired in Georgia
Date published: 2019-04-12
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