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 882.
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  • MSRP: 114.27

Save 20% + free shipping with Water for Life $91.42

Questions? We can help

  • 866-662-6885
  • MON–FRI: 8AM–6PM 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.

How It Works

Superior Systems

Selective Claryum® Filtration

Reduces 68 contaminants while retaining beneficial minerals for optimal hydration.

Easy to install, replace & maintain

No permanent fixtures or installation required.

certified by NSF

Full system certified to NSF/ANSI Standards 42, 53, 401 + P473.

  • 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 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 4 out of 5 by from Aquasana Very happy except it doesn't take lime out of water. Very convenient.
Date published: 2017-12-27
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
Rated 1 out of 5 by from Most simple & easy water filtration I used this filtration over 3 years ago, I cannot find any other better than this, so I reordered again to replace my used filter.
Date published: 2017-12-19
Rated 5 out of 5 by from Long time user I've had this unit since 2009. The filters for life program sends new filters every six months to remind me to change the filters. With all you read about what's in our water I feel more reassured I'm doing the prudent thing for health.
Date published: 2017-12-17
Rated 5 out of 5 by from Countertop Water Filter-White I love the product and it works great. Water tastes better.
Date published: 2017-12-12
Rated 5 out of 5 by from incredible taste I have been using this water filter for a couple of weeks and am very impressed by the taste. My body already feels better! I had no idea that water from the tap would taste so differently.
Date published: 2017-12-12
Rated 5 out of 5 by from Easy installation...good direction s Wish I had purchased long time ago. Am very pleased with quality of water.
Date published: 2017-12-07
Rated 5 out of 5 by from PERFECT This is a great option as a water filter - it sits nicely in the background without taking up too much counter space. There is an option to turn the filter on and also leave it off if you want normal tap water or need hot water. The stream of filtered water is slow, but all filters typically are. In my opinion, this is the best countertop option you could hope for. It isn't noisy like the "Clean Water Machine" can be.
Date published: 2017-12-04
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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

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: 2018-01-12

Have one of these units.(aq 4000) will be moving to a cabin soon that has well water. Can I use it for well water too?

Asked by: RRPacko
Yes, you can use this system for well water too. Well water tends to have a higher concentration of total dissolved solids. This may cause you to need to replace your filters more often.
Answered by: Aquasana Customer Support
Date published: 2018-01-11

Does this come with 2 extra filters? How much are filters?

Asked by: Jan4
This system includes 2 filters as the original filter set. For replacement filters, you can purchase two-packs on our site here for $59.99: https://www.aquasana.com/replacement-drinking-water-filters/countertop-replacement-filter If you sign up for Water For Life, an auto-ship program, you will receive filters every 6 months when they need to be replaced at a discounted price of $50.99.
Answered by: Aquasana Customer Support
Date published: 2018-01-11

Does this filter make the water ph balanced and take chlorine and fluoride out of the water?

Asked by: Suzanne
The countertop filter will make your water more ph balanced, and it does remove 97% of chlorine. However, the only way to remove fluoride from your drinking water is through Reverse Osmosis. Our OptimH20 removes 95% of fluoride plus 87 additional contaminants including lead, mercury, asbestos, pharmaceuticals, pesticides, herbicides, and more. Feel free to check out our RO system here: https://www.aquasana.com/drinking-water-filter-systems/reverse-osmosis-claryum
Answered by: Aquasana Customer Support
Date published: 2018-01-11

What is the number for this countertop water filtration system please?

Asked by: Maureen
Hi Maureen - I would love to help you with your question, but I'm unsure what number you're looking for exactly. This model number is AQ-4000. If you're looking for different information, please let us know and we'd be happy to help!
Answered by: Aquasana Customer Support
Date published: 2018-01-11

Does this work for Well water too?

Asked by: handrobandro
Yes - the countertop system will work for well water. However, due to the total dissolved solids that are typically found in well water, you may need to replace the filters more often than normal. Our 3-stage drinking filters include a pre-filter that will help out with this. However, keep in mind that this system does not eliminate viruses or bacteria. A whole home system designed for well water with a UV light will safeguard you against those issues. Please let us know if you have any additional questions!
Answered by: Aquasana Customer Support
Date published: 2018-01-11

Do you ever need to clean the inside of the counter top housing unit? If so, how do you recommend cleaning it? Thanks!

Asked by: Scout08112
I have never had to clean it, but if you would like it depends a little on the reason. If you have hard water you may want to use a mix of CLR and white vinegar. Good luck!
Answered by: bassuen
Date published: 2018-01-07

Can you run hot water when the pin is not pulled and activating the filter?  Or you can’t run hot water ever when the system is hooked up even when running water regularly through faucet?  Thanks

Asked by: Scout0811
Yes, you can run hot water but only when the pin is not pulled out.
Answered by: nannamay
Date published: 2017-12-31
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