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 967.
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50% OFF COUNTERTOP WATER FILTERS until Oct 14
  • MSRP: 114.27
  • Sale: 57.13

Save 50% + free shipping with Water for Life $57.13

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 Great tasting water It is such a relief to have contaminant free drinking water. Water taste great. Overall I am very satisfied.
Date published: 2019-09-11
Rated 5 out of 5 by from Excellent countertop filter Love the counter top filter. Works great super easy to install. Love the filter are good for 6 months.
Date published: 2019-08-20
Rated 5 out of 5 by from Can’t wait to see how we like it over time! The instillation was a bit rocky, but it was our old faucet and not the filter! We’re looking forward to seeing if it is as well loved as our countertop dispenser was for the last 4 years.
Date published: 2019-08-18
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
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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

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

What is the maximum temperature water this unit's filters can handle? I'd like to hook one up in my bathroom, and get warm water for washing my face. Thanks.

Asked by: Leigh
The system is not designed for hot water as it can degrade the filter media at a much faster rate. The rated temperature range is 40F - 90F degrees.
Answered by: Aquasana Service Team
Date published: 2018-11-26

To the manufacture:   please dhow evidence that it removes fluoride.

Asked by: Jen1
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 
Answered by: Aquasana Service Team
Date published: 2018-11-22

Does this work with a faucet head that pulls out?

Asked by: Question
Unfortunately, the CounterTop system is not compatible with pull out spray faucets.
Answered by: Aquasana Service Team
Date published: 2018-11-11

Does the countertop filter fluoride?

Asked by: Joanie
Thank you for your e-mail and interest in Aquasana. Flouride 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
Answered by: Aquasana Service Team
Date published: 2018-10-30

Doe this filter unit is compatible to pull down kitchen faucet?

Asked by: clean_water
Thank you for your inquiry. No, the counter top system is not compatble with pull down/out sprayers. We recommend an Under Counter system or Clean Water Machine at https://www.aquasana.com/drinking-water-filter-systems
Answered by: Aquasana Service Team
Date published: 2018-10-30

do the filters remove fluoride from the water

Asked by: fresh water
The Countertop system will not remove Fluoride. Flouride removal requires special filtration through a membrane. Our Reverse Osmosis system is NSF certified to remove over 95%of flouride in you drinking water, as well as 87 other contaminants.  https://www.aquasana.com/drinking-water-filter-systems/reverse-osmosis-claryum 
Answered by: Aquasana Service Team
Date published: 2018-09-25

This filter have compatibility with every Faucet?? I concern incompatibility with my faucet and Return is difficult.

Asked by: Jong
The Countertop system diverter is designed to fit most standard faucets. We do offer an adapter pack for sme faucets. The dverted is not compatible with pull out spray faucets, and other types of waterfall sprayers. We recommend sending a photo of your faucet to our Service Team at support@aquasana.com for verification. Our return process is very simple as well. We offer a 90-day no questions asked policy. Simply notify us you wish to return the item, and we will send you an e-mail with instructions and an Authorization Number.
Answered by: Aquasana Service Team
Date published: 2018-09-21

Does it filter out fluoride?

Asked by: Allicyn
Flouride removal requires special filtration through a membrane. Our Reverse Osmosis system is NSF certified to remove over 95%of flouride in you drinking water, as well as 87 other contaminants.  https://www.aquasana.com/drinking-water-filter-systems/reverse-osmosis-claryum  If you are interested in a system, I highly suggest you speak to one of our Home Specialists so they might discuss what options may be best for you before you purchase something you may not need, etc.
Answered by: Aquasana Service Team
Date published: 2018-09-21

Is the plastic body of the aquasana over the counter filter BPA free?

Asked by: Lilinou
Thank you for your inquiry and interest in Aquasana. Yes, all of our drinking systems are NSF certified as BPA Free and non-leaching. Please let us know if you have any questions!
Answered by: Aquasana Service Team
Date published: 2018-10-13

Does this water filter, filter out at least 90% Fluoride?

Asked by: Josanna
Thank you for your inquiry. Flouride removal requires special filtration through a membrane. Our Reverse Osmosis system is NSF certified to remove over 95%of flouride in you drinking water, as well as 87 other contaminants.  https://www.aquasana.com/drinking-water-filter-systems/reverse-osmosis-claryum 
Answered by: Aquasana Service Team
Date published: 2019-01-25

Hi there! Does it kill coliforms ? If yes which ones and what percentage af all coliforms does it make?

Asked by: Polina
Thank you for inquiry. The Counter Top drinking system will not remove Coliform. However, we do manufacture a Reverse Osmosis system that will filter much of the Coliform. But, the only guarantee to eradicate it completely from your water is with a UV system. We do have a Well System with UV if you are interested at https://www.aquasana.com/whole-house-water-filters/500k-gallon-well-water You can also shock your well with bleach, but it may need to be repeated. There is a very informative article at the following link that explains your best options and a chart for disinfection based on the depth of your well. http://www.waterandhealth.org/newsletter/private_wells.html If you are interested in a system, I highly suggest you speak to one of our Home Specialists so they can go over your water report with you and discuss what options may be best for you before you purchase something you may not need, etc. Please give us a call at 866.662.6885 or e-mail Sales@Aquasana.com!
Answered by: Aquasana Service Team
Date published: 2018-11-22

Do either of your countertop models filter out PFOA & PFOS?

Asked by: Sarahh
All of our drinking systems are NSF certified P475 for the reduction of PFOA and PFOS (PFC). The EPA lists activated carbon as a filtration method for removing PFOS and PFOA, which all of our systems contain, which all of our drinking systems are certified to remove. http://www.nsf.org/newsroom/nsf-international-certifies-first-water-filters-pfoa
Answered by: Aquasana Service Team
Date published: 2018-11-22

Can I get replacement filters for the countertop filter ?

Asked by: John Galt
Replacement filters can be found at https://www.aquasana.com/replacement-water-filters
Answered by: Aquasana Service Team
Date published: 2018-08-29

Why the filtered water feels greasy? After installation of the unit and left the water run for more than 10 minutes, the water feels greasy

Asked by: Andres
What you may be experiencing is the magnesium minerals in your water. Without the harsh feel of Chlorine in the water, some customers experience a slick feeling. This should dissipate within a week of use.
Answered by: Aquasana Service Team
Date published: 2018-08-29

One of the tubes is getting brown. What does that mean?

Asked by: so concerned
What you are seeing is the result of the incoming water from your pipes prior to the water being filtered, usually a result of sediment, rust, or iron depending on your water source. The reason you do not see this in the outgoing hose is a result of those contaminants being removed/reduced by our filtration.
Answered by: Aquasana Service Team
Date published: 2018-11-07

Will it eliminate sulfer?

Asked by: Mary t sulferwaterhater
Hi Mary! The counter top system will not remove the sulfur smell in your water. Activated carbon filters can remove low levels of sulfur sediment, manganese and iron. However, maintenance and replacement of filter systems are very high because sulfur, iron, manganese and other suspended materials in the water soon clog the filter. And because the levels in well water change, we do manufacture an Iron Filtration tank to deal with these. Please call ur office at 866.662.6885 to speak with a representative about our Iron Filtration.
Answered by: Aquasana Service Team
Date published: 2018-11-07

While the filter is connected to the faucet, can one choose to get unfiltered water out of the faucet for washing, cleaning, etc.?

Asked by: LK for clean water
Oh, yes! Regular water comes out of the faucet normally. When you want filtered water, just pull out the little pin on the side and the water is then re-directed to the filter and back out in a small stream. I like to turn the faucet on, and let it run for about 10 seconds, then pull the pin, and let that run about 10 seconds, and then I fill my water bottles with the fresh filtered water. When I'm done filling, I push the pin back in, and then turn the water off.
Answered by: Retired in Georgia
Date published: 2018-11-07

I have the counter top filter, just changed filers about a month ago,then I’ve noticed a odd taste /odor to the water. I checked and filters are installed properly. I have had this filter for about a year. What could be causing this bad smell/taste?

Asked by: Scout0811
Did you run cold water through the filter to "clean" it out prior to using it?
Answered by: CleanWaterLover
Date published: 2018-11-07

What types of faucets does this machine fit? 

Asked by: ESansom
The faucet has to have a screw on aerator that can be removed to place the unit hook up. If there is no aerator then you may need an under counter system.
Answered by: BiotechBob
Date published: 2018-11-07

will the countertop system work to remove salt and impurities from softened water?

Asked by: LorieLee
1. Softened water normally should not contain salt and other impurities. 2. The filter cannot remove salt.
Answered by: Jackie Chan
Date published: 2019-01-15

The countertop filter comes with two cartridges correct?

Asked by: Debra Safe Water
Yes, but it is a 2 stage filtration system, one blue and one white and both have to be in the filter at the same time! It's best to sign up for their automatic filter renewal, they send a new set every 6 months, free ship and at the best price! I love mine!
Answered by: Mocki
Date published: 2018-11-07

The hose of my countertop water filter has become yellow in the inner part, is it normal? Does it require maintenance?, in case of yes, who to do the maintenance?, in case of no, how can I replace it? Do you have the replacement hose available?

Asked by: Julia Acosta
Hard mineral buildup and exposure to UV rays can cause the hose to become discolored. Please contact our support team at 866.662.6885 and we will be happy to discuss your warranty options. Thank you, Aquasana Customer Support
Answered by: Aquasana Customer Support
Date published: 2018-11-07
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