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 - limited time!
  • 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 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
Rated 5 out of 5 by from Great tasting water, and very convenient. I really like this filter system. It was very easy to install and use.
Date published: 2019-01-12
Rated 5 out of 5 by from Love it! This filter is amazing. I have tried other filters in the past but resorted to using distilled water in which I added minerals. I am loving this filter though. I tell my husband daily how thankful I am that we purchased it. I love that it filters straight from the sink and I don’t have to worry about the chemicals being in our drinking water. The taste is great. It installs so easily and works really well!
Date published: 2019-01-12
Rated 5 out of 5 by from Cleanest tasting water EVER! Super easy installation -- only change filter every 6 months, and they automatically send it to me -- no more keeping track of when it's time to change filter. I love that it clears out so many contaminants - including pharmaceuticals - which most people are NOT aware of as being a problem in tap water
Date published: 2019-01-08
Rated 5 out of 5 by from Overall impression of new Aquasana Water filter This is the B E S T product one could purchase for the value!!! The water tastes great!!! Better than (and much cheaper) purchasing bottled h2o!!! I am so glad I found this company on line. Was skeptical at first, but now, would NEVER puchase a Britta or PUR water filter again!!!!
Date published: 2019-01-02
Rated 5 out of 5 by from I love the convenience I’ve used Aquasana filters for many years And love the taste. I feel confident that the water I’m drinking is safe and love the fact that my filter eliminates the need for using plastics. I did have to go to the hardware store to get an adapter that would fit my faucet, but otherwise installation was very easy and I did it myself .Great customer service!
Date published: 2018-12-30
Rated 5 out of 5 by from Excellent. Easy to use, good tasting water, highly recommend.
Date published: 2018-12-23
Rated 5 out of 5 by from Won’t ever go back Installation was easy and my water tastes amazing now I can’t believe I was drinking tap water before!!
Date published: 2018-11-11
Rated 5 out of 5 by from Very Pleased From the very first glass, I could tell the difference. It is so good to know that I am getting healthy, clean water that benefits my overall health. Being on a fixed income, I needed to find a low cost solution to obtaining healthy water, and Aquasana had exactly what I needed. It took advantage of the water that I already had, so I didn't have to buy water or a dispenser. I am so thankful to have found out about this, and highly recommend it to everyone.
Date published: 2018-10-23
Rated 5 out of 5 by from It does what you want it to do I have been a customer for at least 4 years, and my parents even longer. I must say, I truly like the job this filtration system does. And I have attached a picture to prove it. The filter on the right is the first filter the water enters through. Then it goes into the chamber with the filter on the left. This amazes me, and has made me even more of a loyal customer.
Date published: 2018-09-22
Rated 5 out of 5 by from I've loved this filter and company for 10 years. Nobody's paying me to write this. I've been a customer for about 10 years and have used multiple different filter systems based on the different sinks in my various apartments. These filters are just amazing. Pure, clean water. All other water tastes gross after this. And the support is unlike any I've ever encountered. Numerous times I've called them up to say "Hey this is leaking" or "I can't thread the thing onto the faucet" or anything, and they immediately mail me a new part that I need, or even the whole system again! Promptly and no questions asked. VERY helpful people. I've recommended them to everyone who ever asks me about water.
Date published: 2018-05-21
Rated 5 out of 5 by from Impression on New Water Filter We love it. Had to find a faucet it would fit to, but once we did it was a breeze to install. Water tastes amazing and feel good knowing we don't have to buy bottles anymore.
Date published: 2018-05-15
Rated 5 out of 5 by from My Aquasana I am loving it! It looks great on my countertop too!
Date published: 2018-05-15
Rated 5 out of 5 by from No more hauling spring water around!! I really like my filtered water system. Before I would have to go get spring water which meant alot of work for me. I would have to wash the bottles which were very heavy and cumbersome. Then haul them around , to and from my home and that was exhausting. Now I just go to my faucet and turn on. The water taste great and so far it has been wonderful. The only question I have is how does it know when the filter is spent. Otherwise it was a good choice for me and my family.
Date published: 2018-05-10
Rated 5 out of 5 by from Extremely happy with change in water quality!! Easy Install.. instant results. I couldn't be happier...
Date published: 2018-05-04
Rated 5 out of 5 by from Happy The filter was easy to install. The water tastes perfect. I'm happy I changed from 5 gallon water bottles to this filter. Filling up items with water is a slow process but it is a good trade off. Money saved indeed.
Date published: 2018-04-27
Rated 5 out of 5 by from Does the job Perfect size, water taste great, easy to install. This is my second filter in 15 years, never had a problem with the old one, just decided to buy a new one since it was on sale for not much more than the cost of the filters
Date published: 2018-04-26
Rated 5 out of 5 by from Easy to install, works well. Very concerned about water quality here and now my mind is at ease. No more drinking water jugs and lifting.
Date published: 2018-04-20
Rated 5 out of 5 by from clean water cleans our well water like advertized it is now drinkable
Date published: 2018-04-18
Rated 5 out of 5 by from Unobtrusive style and easy to install I purchased the counter-top water filter about a month ago and am all around very pleased. I especially like the design: neutral color, sleek shape and perfect length of water tubes. Flawless instructions for very easy install. Water tastes different - presumably cleaner and healthier!
Date published: 2018-04-10
Rated 5 out of 5 by from Easy To Install Easy installation and good water quality. Will definitely recommend.
Date published: 2018-04-10
Rated 5 out of 5 by from Great Great little filter. Very easy to install. I live in a small, handicap apartment , allowing me to wash larger items that were a problem for me when I had the facuet Brita before.
Date published: 2018-04-10
Rated 5 out of 5 by from Great tasting water I have really hard water and bad water and it really cleaned it up real well to taste is unbelievable customer for life
Date published: 2018-04-03
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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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