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 914.
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  • MSRP: 114.27
  • Sale: 57.13

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

Questions? We can help

  • 866-662-6885
  • 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 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 3 out of 5 by from Great taste. Install not so great Water taste great. The tubes to hookup get in the way. I could never get it attached with out a leak.
Date published: 2018-03-04
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 4 out of 5 by from Great Features Replacing old filter system. Pros: Great tasting water. Very easy to install. Cons: Slow pour
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
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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 have the countertop filtration system and wanted to know if the water diffuser end of the pure water can unscrew for cleaning. Dirt has apparently gotten into that part of the pure water end and is causing a problem.

Asked by: junior44
I have the same countertop filtration system but have no idea what you are referring to when you say "diffuser end" -- unless you might mean the part that attaches to the faucet itself -- where the water comes out. If some kind of dirt has gotten in there, I would say, yes, clean it out. Are you sure it is dirt? Could it be mold? If so You may want to bleach it, too. Do not get bleach on the actual filters, but the housing unit and the faucet attachment should not be harmed by a quick bleach bath. Rinse thoroughly before re-assembling. Be careful to not touch the filters with unclean hands, or bleach, if you are going to reuse the same ones. If it is time to put in new filters, then take the old ones out, clean and bleach the unit. Rinse very well and then replace the filters. You should be able to clean any part that you normally can assemble, or take apart, on the unit. Hope that helps.
Answered by: Retired in Georgia
Date published: 2018-02-21

How long do filters last

Asked by: Gino
According to the website the filters last 6 months
Answered by: Greta
Date published: 2018-02-06

How long are the hoses for this 

Asked by: Marfe
The diverter hose is about 32 inches, just under 3 feet. Thank you, Aquasana
Answered by: Aquasana Customer Support
Date published: 2018-01-17

Why can't you send me replacement o rings? You sent one large o ring, not what I need. I need two small o rings.

Asked by: Chickie
Hello! I'm sorry to hear that the wrong replacement part was sent. Please contact our service team directly at 866.662.6885 so that we can get the correct part sent out for you. Thank you, Aquasana
Answered by: Aquasana Customer Support
Date published: 2018-01-17

I have a countertop dishwasher. It already installs an adapter into the faucet that allows the hose to easily attach. Does this allow for additional items to be connected? 

Asked by: gwgarner
The diverter hose that comes with this system does not allow for other attachments to be added on. If you would like to contact our service team directly at support@aquasana.com, you can send in a picture of your set up, and we will be happy to take a look and let you know if we think the devices will be compatible. Thank you, Aquasana
Answered by: Aquasana Customer Support
Date published: 2018-01-17

Does your filters filter Radium?

Asked by: CharlieC
The system you selected is not certified to filter radium as Reverse Osmosis is the strongest form of water filtration. Our Reverse Osmosis system, however, is NSF certified to remove 80% of radium. See the performance data sheet here: http://cdn.aquasana.com/assets/AQ-RO-3_Performance_Data.pdf. If you're interested in purchasing this system, here is a link: https://www.aquasana.com/drinking-water-filter-systems/reverse-osmosis-claryum
Answered by: Aquasana Customer Support
Date published: 2018-01-15

Do you carry the stainless steel counter top fillter anymore?

Asked by: Jayne
We no longer carry this item in the brushed metal. You can purchase this item in white.
Answered by: Aquasana Customer Support
Date published: 2018-01-15

Do any of the countertop filters not require hook up to faucet

Asked by: ttbon
ok do any of your filters adapt to the detachable sprayer Kohler
Answered by: ttbon
Date published: 2018-02-27
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