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 927.
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50% OFF COUNTERTOP WATER FILTERS until Apr 30
  • 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: 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 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
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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 read about the plastics particles found in water now. Does you filter remove them also?

Asked by: Robert A
I am still finding SOME particles, but not half as much as I was when using other companies' products. I'm much happier about the clarity of my water with Aquasana than I EVER was with the other companies' water filtration products. 
Answered by: Kerriberri213
Date published: 2018-04-14

How long is the hose that attaches to the faucet. it looks pretty short.

Asked by: debjohnson513
Yes, it is.
Answered by: Anonymous
Date published: 2018-04-13

How do you know it is time to change filter in 4105 model

Asked by: dorai
You can know by a change in the taste of the water, but I am using the Aquasana for Life program. The filters are sent every six months at a discount and with instructions.
Answered by: JoeInAR
Date published: 2018-04-11

Does this filter Fluoride?

Asked by: kiowa
Aquasana's Claryum Counter Top Unit is not designed to reduce nor remove fluoride from your drinking water. The Aquasana OptimH2O is NSF Certified to remove over 95% of fluoride from your drinking water. Thank you, Aquasana Customer Support
Answered by: Aquasana Customer Support
Date published: 2018-04-12

how does this effect ph level?

Asked by: jonesy345
Aquasana's Claryum Counter Top Unit will not enhance nor balance pH levels in the water. Thank you, Aquasana Customer Support
Answered by: Aquasana Customer Support
Date published: 2018-04-05

I want counter top filter with full protection .can you tell me features of your counter top filter and size.

Asked by: Jatinder
I was not able to fit it to any faucet. It's a weird size
Answered by: QueenieQQ
Date published: 2018-03-25

I can't get the filters out of the unit, they're stuck. Any ideas? This has happened before and it's getting frustrating. I'm afraid I'll have to buy a new unit again.  Also, if I do buy a new unit, do you still carry the brushed nickel?

Asked by: Barbara Luna
Yes, this often happens with the filter that has the small rubber-sealed nipple pointed "into" the filter frame. What I do is find the small vise-grip pliers, grab one of the fins on the back and wiggle it. That should loosen it enough for it to fall out. Not sure about the brushed nickel model. HTH
Answered by: Hobiwan
Date published: 2018-03-22

Where can I purchase a new O ring for my aq 4000? Not the 2 small ones that attach to the actual filter, but the bigger one (about 2 1.2''). Thank you for a response.

Asked by: Robster
I replaced the entire filter when I needed one because I do know where to find them. sorry, could not help you.
Answered by: Negam
Date published: 2018-03-22
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