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 938.
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50% OFF COUNTERTOP WATER FILTERS - limited time!
  • 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–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 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
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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

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

I'm unable to unscrew one of the filters in the over the counter system. Is there a trick to make it lose? I have to replace the filter I just bought and I'm stuck. Thanks!

Asked by: Mauro
Please call our Service Team at 866.662.6885 for further assistance.
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: 2018-09-21

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: 2018-09-21

I need to replace my undercounter AQ-4035 but I can't seem to find it listed? Is there a replacement model for it?

Asked by: Covina water
Thnk you for your inquiry. Please call our office at 866.6626885 or e-mail support@aquasana.com for replacement parts. You may be entitled to a free warranty replacement. If you need relacement filters, you may order them at https://www.aquasana.com/replacement-drinking-water-filters/countertop-replacement-filter
Answered by: Aquasana Service Team
Date published: 2018-09-21

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: 2018-09-18

Under the counter AQ-4601filtration system. Tubing that goes between the two filters is leaking. I can't seem to take the steel rings off of the tubing off to fix it. Is there an easier way to fix this or should I have to buy a new one?

Asked by: AlexInEmeryville
Our apologies you have a leak. DO you have the tubing in a full inch? Please call our office at 866.662.6885 for assistance.
Answered by: Aquasana Service Team
Date published: 2018-09-07
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