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 Easiest water filter ever! I love having good, filtered water straight from the tap. It was easy to install and makes it simple to use filtered water for everything that will go in my body without the expense of a huge system. The filtering pitcher has become too heavy for my 97-year-old mother and this is the perfect solution. Plus, it filters better! So happy to have made this purchase.
Date published: 2018-03-19
Rated 5 out of 5 by from Our friend for life After 10 + years of use and abuse from my 4 daughters and I, the old unit was in need of some repairs, I was able to get it into working condition and it lasted another year. I finally made the decision to retire. the old guy and replace him with a rookie. The rookie works fine as expected. Thanks
Date published: 2018-03-14
Rated 5 out of 5 by from Great product - great customer service! We've had this product for over 2 years now, and are still overjoyed with it! Great tasting water whenever you need it from the tap, and we fill glass quart bottles to store in the fridge when we want it really cold. We're on the Water for Life program, which means we get filters shipped to us automatically, so we're never without great clean drinking water. Better yet, the product is warranted for life under the Water for Life program, so when our covers got worn and our intake hose got discolored from the city water coming in, Aquasana replaced them free with just a nominal shipping charge. And speaking of the intake hose, you'll know the system is working when the intake hose turns brown with use and the output hose is as clear as the day you got the system. If we could give it 10 stars we would!
Date published: 2018-03-13
Rated 5 out of 5 by from Money well spent Have had the counter top filter for a bit over a month and no complaints. It took less than a minute to install. There is definitely a difference in the taste and clarity, the slow pour is really not an issue for me. This is perfect for apartment dwelling. Considering the cost, waste and time of purchasing bottles or pitcher filters this is the best value.
Date published: 2018-03-09
Rated 5 out of 5 by from My wonderful over the counter water filter I am so very pleased with my over the counter water filter...good clean water....i like the fact it handles 450 gallons of water...i love the easy set up ...and this product cleans out over 20 contaminents that well known filters dont even come close to (other products handle only 5) i tell all my friends and family about your filter and encourage them to purchase one as i care about them and want to keep them healthy.
Date published: 2018-03-08
Rated 5 out of 5 by from Excellent filter! I bought one for my house, and i liked so much that I bought one for my son as well.
Date published: 2018-03-07
Rated 5 out of 5 by from Best water filter! I bought this for my mother and it is the best! She loves it! It was easy to set up and doesn't take up too much counter space. Convenient and sleek. Great tasting water. The days of lugging around bottled water are over. We will be purchasing more in the future.
Date published: 2018-03-05
Rated 5 out of 5 by from Perfect for My Single-Person Household This unit is small enough to be unobtrusive on the counter, extremely easy to install, and does its job exceptionally well. The taste of my tap water is noticeably cleaner and chlorine-free; I used to hate drinking plain water, but now I find myself filling up a glass at least once a day. Just what I was hoping for! Of note: yes, it does flow slower than the standard tap, but good things take time. =)
Date published: 2018-03-01
Rated 5 out of 5 by from Delightful addition Just purchased this about and more than pleased with the great tasting water. It is pure and clear. This item is small enough for any size countertop or sink. It packs a great tasting water. It was very easy to install. Highly recommend.
Date published: 2018-02-27
Rated 5 out of 5 by from Easy installation m Our water is pretty good to begin with. I needed a filter to clean up what our supplier misses. I haven't had the water tested but it tastes great. Comes out slow, I can live with that.
Date published: 2018-02-26
Rated 5 out of 5 by from Perfect Filtered Water I bought this product because I saved money over that of competitors and it appears to filter more things out. I have an autoimmune disorder and believe it will help my illness by filtering out more toxins from the water. It was easy to install with the video instruction and it works perfectly with no leaks.
Date published: 2018-02-25
Rated 5 out of 5 by from Cuoldn't be happier The water from Aquasana filter is amazing. I feel more alert, with better cognition since drinking water filtered by Aquasana. Filtered water from the store or from a water store has nothing on this filter. The fact that it also takes out ammonia is amazing. I was also very appreciative of the customer service rep I dealt with, Joel H., who was super honest, and gave me a two for one promotion without me ever having to be hesitant about purchasing in the first place. He knew I was going to buy, and I was just deciding which filter to purchase for my countertop, whether to go with the electric one or the one I am leaving a review for, and then I was going to purchase a shower filter as well. He still told me about the two for one promotion that I would not have been able to learn about online or anywhere else. I really appreciated his honesty, when he clearly could have gotten a higher sale. Super honest employees! The filter is super easy to install, just use pliers to get the tip off of your spout. I did not end up needing the extensions that came with the product, but if you do, they are already included. Overall, I am extremely satisfied with the product, its installation, and the customer service. Also, I read some reviews about slow water flow, and I have found my experience to be pretty good with that. I can fill up a a 12 cup pitcher in 51 seconds (yes, I timed it :)
Date published: 2018-02-20
Rated 5 out of 5 by from Love it so far This filter installed without any issue, and has been working perfectly since, for over a month.
Date published: 2018-02-19
Rated 5 out of 5 by from Outstanding Been about a month now and is well! Product is clear, concise and to the point.
Date published: 2018-02-19
Rated 5 out of 5 by from Best water purifier This Aquasana is so easy to set up. We have very hard water and with the Aquasana we now have the best tasting water. I very highly recommend Aquasana.
Date published: 2018-02-17
Rated 5 out of 5 by from Great Counter Top Filter I have bought a number of these in the 10 plus years I have been using them. They work great and simple to install, my only problems have been with the divert-er. The water flow is a bit slow once the filter starts collecting junk, but all in all I am very happy and just hope it is taking out all that it says it does.
Date published: 2018-02-16
Rated 5 out of 5 by from Nice Device This countertop filter is convenient and efficient. It is less trouble than the previous Britia filter system, as I don't have to fill pitchers. It provides very good tasting water at all times.
Date published: 2018-02-16
Rated 5 out of 5 by from SUPER SWEET. SUPER DEAL. SUPER PRODUCT. Recently purchased the Aquasana model # AQ-4000W Counter Top Water Filter System. Took advantage of a BOGO offer from Aquasana and also signed up for the Water For Life Program which automatically ships new replacement filters to me every 6 months at a discounted rate with free shipping. Just doesn't get any better than that. Even a novice DIY'er can hook this filter up in 5 minutes. Keep in mind this is not an entry level filter. This POINT OF USE system has 2 high performance filter cartridges inside it and sells at a very affordable price. I have been using the filter for several weeks now and it has performed flawlessly. I am also investing in some Water Bottles from Aquasana so I can bottle my own water instead of buying it at the convenience store. KaChing! KaChing! Need I say more? This is a great company doing a great business and providing a great service to its customers. Very happy with this purchase. Thank you Aquasana.
Date published: 2018-02-16
Rated 5 out of 5 by from Great taste I love my sink filter. Does a great job. I only wish the hose was about a foot longer. This would help when Moving to other side of sink.
Date published: 2018-02-14
Rated 5 out of 5 by from Great product I bought last December. It’s easy to install and great product.
Date published: 2018-02-14
Rated 5 out of 5 by from Easy to use Very easy to install and very easy to use. Thanks.
Date published: 2018-02-13
Rated 5 out of 5 by from Not Just Another Water Filter Purchased a few months ago, this filter was recommended by a Dr as this filter allows the essential minerals to pass thru. The unit is attractive, small and easy to install. Also, pending your usage, six month replacements may not be necessary.
Date published: 2018-02-09
Rated 5 out of 5 by from Accomplishes objective I have used the filter for about a month. While I have not tested the filtered water for chemical content, the water processed through the filter is clear with no chemical taste. The coffee I make with water through the filter is tremendously better than before.
Date published: 2018-02-09
Rated 5 out of 5 by from Thanks Aquasana We’re enjoying clean water for pennies per day. Nice product.
Date published: 2018-02-09
Rated 5 out of 5 by from Easy and Convenient to use I'm really enjoying using my new water filter system. I have installed it on the laundry room sink and it is so easy to use. I'm happy to be drinking filtered water and not just tap water any longer. I fill up my bottles and put them in the refrigerator where they are ready to grab and go. The convenience is great.
Date published: 2018-02-09
Rated 5 out of 5 by from Space saver I bought it to replace larger filter in my RV. We have a small motor home, that we use 3 months a year and want good water when we are traveling. The filter gives that to us and occupies a very small space.
Date published: 2018-02-09
Rated 5 out of 5 by from This filter has excellent quality I've been using this water filter for over 6 years and would definately recommend it .
Date published: 2018-02-07
Rated 5 out of 5 by from GREAT FILTER This is my second tome buying the AQ-4000w. The first one lasted me for years and I loved it, so I bought the same model again. I like that it removes so many contaminates. I know my family is drinking good clean healthy water. I don't mind that the water pours out slowly. That tells me the filters are doing a thorough job cleaning the water. That's more important to me than how fast the water comes out. If you want fast pouring water get it straight from your tap.
Date published: 2017-12-29
Rated 5 out of 5 by from Great filter The water flow rate is not the greatest, but it is a great filter. I have bought this filter several times and have given it as a gift too.
Date published: 2017-12-27
Rated 5 out of 5 by from Improved Taste of Water A great improvement in the taste of our water. Thank you.
Date published: 2017-12-26
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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

Our city has warned us not to drink the water due to high levels of Manganese in the city water supply. Will the Aquasana countertop filter reduce Manganese to a safe level for drinking?

Asked by: XSleeper
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: 2019-09-21

Did you stop selling replacement water hose connection for the countertop filter?

Asked by: JJJJ
Hello, Please contact us at 866-662-6885, to help provide replacement part for you. Thank you, Aquasana Support
Answered by: Aquasana S
Date published: 2019-09-21

Counter top filter unit filter replacement is extremely difficult, as attested to by the many comments on this site about the problems with it. I broke mine, again, and would like to get a replacement but not until the design flaws are corrected. When?

Asked by: Mark10
Hello, Thank you for reaching out to us please give us a call at 866-662-6885 to help find the perfect solution for your home. Thank you! Aquasana Support
Answered by: Aquasana S
Date published: 2019-09-21

How many years does the aquasana countertop system lasts? Not the replacement filters but the whole system. Every how many years do I need to buy a brand new system?

Asked by: Fenia
I've had my system for over 10 years, I just replaced the hoses with my last move because the guy that took it off the faucet in my last house apparently damaged the nozzle. And water for life means free parts, NO HASSEL
Answered by: vkey2sing
Date published: 2019-09-08

Can I use it in my camper with the campground water supply?

Asked by: Camperdeb
I don’t see any reason that it would not work as long as you can hook it up to a faucet and the pressure is not too high for it.
Answered by: Jakpro
Date published: 2019-09-04

How do I switch it off so that I can use hot water for cleaning dishes?

Asked by: JillD
There is a little knob on the side that pulls in and out. Pull it out to run the cold water through the filters -- push it in to run either hot or cold water out the faucet like normal. If your knob does not push in you may want to contact customer service.
Answered by: Retired in Georgia
Date published: 2019-08-26

What are the dimensions of filter holder.

Asked by: Kstepan
Please be more specific, what do you mean when you say "Filter holder"
Answered by: Jacko
Date published: 2019-08-26

Does this reduce or eliminate PFAS?

Asked by: Marie C
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. 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: 2019-08-19
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