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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$5999 COUNTERTOP WATER FILTERS until Jun 25
  • MSRP: 114.27
  • Sale: 59.99

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

Questions? We can help

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

The hose of my countertop water filter has become yellow in the inner part, is it normal? Does it require maintenance?, in case of yes, who to do the maintenance?, in case of no, how can I replace it? Do you have the replacement hose available?

Asked by: Julia Acosta
Hard mineral buildup and exposure to UV rays can cause the hose to become discolored. Please contact our support team at 866.662.6885 and we will be happy to discuss your warranty options. Thank you, Aquasana Customer Support
Answered by: Aquasana Customer Support
Date published: 2018-06-15

How much yearly cost to replace filters

Asked by: Phildirt
We suggest replacing the filters in this system every 6 months. Each set of filter swill cost $59.99 (or 50.99 if you opt into our autoship program). So your annual cost for maintaining this system is between $101.98- $119.98 Thank you, Aquasana Customer Support
Answered by: Aquasana Customer Support
Date published: 2018-06-15

Does this system filter out cyanotoxins from algae blooms?

Asked by: Lesli
I would call Aquasana directly. This is a great question. You receive a print out for everything it filters but I’m unable to locate mine
Answered by: Mizani
Date published: 2018-06-06

Hi - I was interested in getting this. I looked at the performance data and I don't see any testing for Hexavalent chromium. Can you let me know if it will filter this out?

Asked by: Rich-T
Thank you for your interest in Aquasana! The Counter Top system is not NSF certified for the reduction of Chromium 6. For 97.0% Chromium 6 reduction, check out our Under Counter Reverse Osmosis System - https://www.aquasana.com/drinking-water-filter-systems/reverse-osmosis-claryum Thank you, Aquasana Customer Support
Answered by: Aquasana Customer Support
Date published: 2018-06-02

I have a spray ball attached to my faucet. I would like to attach it after the aquasana diverter. Is there a threaded connection at the bottom of the aquasana diverter? I can send a picture if needed to demonstrate the spray ball connection.

Asked by: loriand
Hello! Please feel free to send pictures to support@aquasana.com and we will be happy to take a look and let you know if it looks compatible. Thank you, Aquasana Customer Support
Answered by: Aquasana Customer Support
Date published: 2018-06-02

Do you need to flush each morning?

Asked by: Lucy
No, you just need to flush new filters for 10-15 minutes after you install them. After that they will be good for 6 months. If you are gone for an extended period of time, then you may want to flush the system for a few minutes. Other than that, no flushing is necessary. Thank you, Aquasana Customer Support
Answered by: Aquasana Customer Support
Date published: 2018-06-02

hello. i've been reading some reviews on your aq 4000 countertop filter, and quite a few remark on how difficult it is to replace the filters, (and others about leakage). please explain why these might happen. thank you. joel

Asked by: red1
Hi Red, This system works by using your water pressure to force the water through the system and out of the spout. If the filters are not changed frequently enough, or the caps are over tightened, then the pressure buildup may make it difficult to get those caps off. We suggest using a .17 mm socket wrench on the caps, and even if they are super tight, it should make loosening them very easy. Leaks may occur if parts of the system have started to wear down after several years of use, or if parts are installed incorrectly. We have a full service team available at 866.662.6885 to assist in troubleshooting any problems you may encounter. Thank you, Aquasana Customer Support
Answered by: Aquasana Customer Support
Date published: 2018-05-25

If 2 persons are using the filter, can we keep it for a year? As the 6 months is calculated for 4 persons. Or will mold and bacteria start growing after 6 months anyway? Thank you!

Asked by: LenaA
We have 4 in our family and it usually lasts more than a year. You can tell by the water pressure is weak when filter is clogged means a replacement is needed. We use for all our cooking such as soup, boiling.... Hope this helps.
Answered by: Joe.
Date published: 2018-05-20
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