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 954.
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50% OFF COUNTERTOP FILTERS WITH WATER FOR LIFE until Mar 25
  • MSRP: 114.27
  • Sale: 79.99

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

Questions? We can help

  • 866-662-6885
  • MON–FRI: 8AM–6PM CDT
  • SAT–SUN: 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 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
Rated 5 out of 5 by from Satisfied Filter was easy to assemble, fairly priced, of good quality.
Date published: 2018-04-02
Rated 5 out of 5 by from Thankful for good water In the small town in which I live, city water has a metallic, chemical taste. This off-putting taste permeates everything prepared with city water. I am quite thankful to have found Aquasana. The model selected for my kitchen faucet was easy to install & makes a huge difference in my cooking. Thank you for making an excellent product!
Date published: 2018-03-30
Rated 5 out of 5 by from Excellent product, with long anticipated life I found it very easy to set up, and use... the water is delicious. Stephen Thompson.
Date published: 2018-03-28
Rated 5 out of 5 by from Great reliable water filter Late 2016, I started using this counter-top filter to supply tap water for the entire family. I also discontinued my monthly subscription for 5-gallon purified water. I am happy ever since. Just need to replace the filter every 5 months, and I use the filtered water for drinking and cooking.
Date published: 2018-03-24
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
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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

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
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