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 963.
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  • MSRP: 114.27

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

Questions? We can help

  • 866-662-6885
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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 Obvious improvement in water quality Having this water filter gives me confidence that my drinking and cooking water is healthy. The unit itself fits easily on my counter and is trouble free in operation.
Date published: 2019-08-13
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
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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

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

Does this filter fluoride? 

Asked by: Cait
Hello, Thank you for your question. Fluoride removal requires special filtration through a membrane. Our Reverse Osmosis System is NSF certified to remove over 95% of fluoride in your drinking water, as well as 87 other contaminants. For more information, please visit: https://www.aquasana.com/drinking-water-filter-systems/reverse-osmosis-claryum If you have further questions please contact us at 866-662-6885. Thank you, Aquasana Support
Answered by: Aquasana S
Date published: 2019-04-04

Does the counter top AQ 4000 need to be cleaned

Asked by: Dato
The unit itself, that is, the housing for the two filters, does not, in my experience, need to be cleaned. Our current unit, in daily use for over 5 years has showed no sign of any sediment or residue inside. The attachment at the end of the faucet, however (depending on your water supply), may need to be disassembled and cleaned of sediment from time to time. Our Los Angeles area water is "hard", and over time, the faucet filter attachment accumulates tiny mineral crystals that restrict water flow.
Answered by: Hobiwan
Date published: 2019-04-01

My kitchen faucet needs a female threadefd adapter

Asked by: Dummy
These might be found at a hardware store. I went online to Home Depot and did a search for "faucet female adapter" and found two, but you would have to test them out to see if they fit your faucet. They can also be found under "hose female adapter" -- hope that helps
Answered by: Retired in Georgia
Date published: 2019-03-18

Does this include the 2 filters?

Asked by: Rhonda Gresiuk
Yes, it includes the filters.
Answered by: Raye
Date published: 2019-03-02

Does the countertop filter come with filer? How many filters in it and how much do they cost. Also, is there a light to show when filterneeds changing?

Asked by: Sher bon
The Countertop filtering system comes with two filters, two connecting plastic hoses, and mounting faucet dispenser with adapters. Unfortunately, it does not have a light to tell you when it is time to replace the filters. It depends how often you use the system. It can be from 3 to 6 months. The cost is posted online.
Answered by: Walt
Date published: 2019-02-26

I have installed the under top AQ-4035. I need a replacement for the filters' container. I don't like the over top.

Asked by: CarlosMiriam
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: 2019-02-25

Will running warm or hot water through the filter negatively affect the outcome or performance in any way? I would like to buy this to help get clean warm water for mixing formula faster than waiting for a bottle warmer. 

Asked by: Mel the mom
It comes with a warning on it to only run cold water. It says running hot water can damage the filters and void the warranty. Hope this helps. Maybe you could get an electric kettle & fill it with cold filtered water?
Answered by: JessicaFB
Date published: 2019-02-19

I've had my filter for few years. Now the water drips from the filtered water side whle the faucet is off. I've tightened it but that did not help. How can this be fixed?

Asked by: bluebass
Sounds like a new washer is needed which you may purchase at a hardware store. There is also plumbers thread seal white tape that can be wrapped around the screw mount. I also looked on the website and they do have replacement attachments that you can purchase for $15.99 or $27.96 if you need a pre-filter. That would probably solve the problem, too. Look under Water Filter Parts, Accessories. Sometimes things just get old and need to be replaced.
Answered by: Retired in Georgia
Date published: 2019-03-07

Can you switch it back and forth between filtrated water and regular tap water to wash dishes so the flow rate is faster than the filtered water?

Asked by: ktrout
yes!
Answered by: grimy
Date published: 2019-02-12

What is the shelf life of the replacement filters? My family drinks a lot of water. So much so I believe we will go beyond 450 gallons before 6 months. So I want to have extra filters on hand but want to know how long they will last unopened.

Asked by: Stephylace
About 10 years ago, I bought a second unit, including replacement filters, to hold as a spare, or spare parts in case of an emergency. I put it away and forgot about it until last year, when I discovered it in a corner of the garage. So I pulled the filters and used them. The clarity and taste of the water was as good as if using a new filter. So, from a user point of view, I'd say that if you keep the wrapping intact on the filters, they have a shelf life of some years. Now, that could vary, based on conditions of storage, such as temperature, humidity, etc. A conversation with company expert(s) might provide more accurate information. Hope this helps.
Answered by: Hobiwan
Date published: 2019-01-27

Can your countertop water filter be used with a salt based ion exchange water softener?

Asked by: Aurelio
Hello, Thank you for your question. Yes our Aquasana counter top can be used with an ion exchange water softener. However, kindly keep in mind the system will not help remove salt from your water. If you have any further questions please contact us Toll Free 866-662-6885. Thank you, Aquasana Support
Answered by: Aquasana S
Date published: 2019-01-15

How often, on average, do you have to replace the filters? ie. If I drink 150 ounces per day, how long would you expect the filters to last?

Asked by: Su Z Q
Hello, Thank you for your question. We suggest replacing the filters in this system every 6 months. Each set of filters will cost $59.99 (or 50.99 if you opt into our auto ship program). If you have any futher questions please contact us at Toll Free 866-662-6885. Thank you, Aquasana Support
Answered by: Aquasana S
Date published: 2019-01-15

Does Aquasana notify when it's time to replace filters? Thank you.

Asked by: Vavi
I have auto-ship for replacements. They notify when they are shipping them.
Answered by: Raye
Date published: 2019-01-15

Can you switch from filtered to non-filtered tap water for washing dishes?

Asked by: CSG2
yes instructions in description
Answered by: sosewlinda
Date published: 2019-01-06

Why are some customers saying this filter does not filter chlorine and chloramines? I saw someone on youtube saying the same thing damning Dr. Mercola for selling your products. What is the truth of all this?

Asked by: Afua
Hello - the performance safety data sheet is linked right on the product page. It clearly shows a 97%+ reduction in chloramines. We've used Aquasana filters to reduce chloramines in our tapwater for over a year with great success. A family member has very severe reactions to chloramine exposure and the Aquasana filters have reduced it to almost nil. We LOVE Aquasana.
Answered by: Bobbi22
Date published: 2018-12-31

How long are the hoses?

Asked by: Greg_M
From the outside of the filter unit to the faucet connector, it's 28 inches (give or take a quarter inch) by my measure.
Answered by: Hobiwan
Date published: 2018-12-30

Can the undercounted filters be used in an apartment? Or are they a permanent fixture?

Asked by: Margo
Can be used in apartments. These filters easily screw onto the water spout for the water to release, runs through plastic tubes and holds onto the main white holder where the filters are held sit on the counter.
Answered by: pocomojo
Date published: 2018-12-20

does this system remove sodium chloride ?

Asked by: Casper
No! it won't turn sea water into pure water
Answered by: Never Aquasana Again
Date published: 2018-12-12

does this filter aluminum at all?

Asked by: jessy
Yes.
Answered by: Derrick K.
Date published: 2018-12-05

what is your source of carbon in the filtration system. is it from Coconut shells? Or some other carbon product?

Asked by: Dane
Aquasana carbon filters are made from Coconut Shell Carbon.
Answered by: Aquasana Service Team
Date published: 2018-11-16

Hello, how large is the largest particle that can get through AQ-4000's filters , in microns? Can it filter out all amoeba? Thank you.

Asked by: King Ori
Thank you for your inquiry. All of our drinking system filters are 0.5 microns. It will not filter all amoeba.
Answered by: Aquasana Service Team
Date published: 2018-11-16

What are the dimensions/weight of the countertop filtration and does it remove more chlorine than the under the sink?

Asked by: mary-jo
Thank you for your inquiry. The CounterTop system removes 97% of chlorine, the same amount as all of our under counter systems. The dimensions are 9" H x 7.25" W x 4.25" D.
Answered by: Aquasana Service Team
Date published: 2018-11-15

Hi when you have counter top filter set up can you still run hot water through it to do dishes etc. Thanks Karyn

Asked by: KaynB
We do not recommend running hot water through the filtration as it may degrade your filters prematurely.
Answered by: Aquasana Service Team
Date published: 2018-11-11

How is it hooked up to the water buy a hose or what cuz I have a special faucet and other ones haven't worked.

Asked by: D the aqusana water lover
The Counter Top system is designed to attach to your faucet with a diverter. For a short demonstration video, please go to https://player.vimeo.com/video/139268619
Answered by: Aquasana Service Team
Date published: 2018-11-07
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