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 976.
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$5699 COUNTERTOP WATER FILTERS until Feb 29
  • MSRP: 114.27
  • Sale: 56.99

Save 50% + free shipping with Water for Life $56.99

Questions? We can help

  • 866-662-6885
  • MON–FRI: 8AM–7PM CST
  • SAT: 9AM–5PM CST

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 filter if you don't have much space Finally have a piece of mind that contaminants have been reduced and that 'drink more water' is actually going to be better for my health!
Date published: 2020-01-15
Rated 5 out of 5 by from Excellent filters Great value for excellent filtration system ........
Date published: 2020-01-05
Rated 5 out of 5 by from A very easy system to install! I installed this unit to a small bar sink witch was very easy and I fill several gallons of water bottles to put in my refrigerator tru out the week.
Date published: 2019-12-25
Rated 5 out of 5 by from Like night and day The difference in the taste of your tap water is immediate and entire. You never knew your water had problems before this.
Date published: 2019-12-15
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
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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 do have a counter top water filter, but I am using distilled water in my humidifier. Would the filtered water be as good for the humidifier to prevent it from building up calcium/whatever that stuff is that shortens the life of the humidifier?

Asked by: Erona
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: 2020-02-03

Do both countertop filters comparable in terms of output?

Asked by: ........
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: 2020-01-28

Is this a Reverse Osmosis filter?

Asked by: Alex S
Hello Alex, Thank you for your question. No it is not the reverse osmosis system, I have provided the systems down below. https://www.aquasana.com/drinking-water-filter-systems/reverse-osmosis-claryum If you have any further questions feel free to contact us at 866-662-6885. Thank you, Aquasana Support
Answered by: Aquasana S
Date published: 2020-01-28

I have an old one and the hoses that carry the water have turned orange. Is that safe? Are they replaceable? The filters works fine

Asked by: Waterfilter fan
Call the company, cause I just got mine, they are still white. U only using cold water right??
Answered by: Cherie
Date published: 2020-01-03

We have needed an adapter for our last two homes.  We had to run off of our bathroom sink in the last house.  Can we get an adapter? 

Asked by: Gabrielstre
the package provides multiple adapter but if you those one's don't fit you can go to any home improvement stores and buy the right one. It would be best to use non plastic ones to avoid stripping the tread off the filter and your faucet.
Answered by: richieLA
Date published: 2019-12-31

What are the performance characteristics of the AQ-4000W? I don't imagine that they are as robust as the under-the-sink models with extra filtration, and I don't see any performance charts on your website for this particular, counter-top model.

Asked by: Leez
both my daughter and myself will never allow ourselves to be without at least the counter-top filter from Aquasana. The water is notably better in every way, and the replacement filters arrive just as you are beginning to detect a change in taste. The job they do is exceptional, and when my kids are able to purchase their own house I know they will be interested in getting an under-sink or whole-house model. We have used the counter-top models for about 3 years and will never be without. You will love it!
Answered by: CarolynRH
Date published: 2019-12-18

I have the old AQ-4000 for under the counter and I can’t get the filter covers to come off on either side. Do you have a replacement unit? I can’t use the counter top because of the type of faucet I have.

Asked by: Shedancer
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: 2019-12-04

How will I know my countertop filter needs replacing?

Asked by: The water dude
The average household usage is about 6 months however, while I do use the date as a guide, there are other indicators as well. First, the water begins to flow more slowly from the faucet and the biggest indicator of all is the taste of the water.
Answered by: Bexter
Date published: 2019-11-19
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