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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 988.
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  • MSRP: 129.99
  • Sale: 64.99

Save 50% + free shipping with Water for Life $64.99

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 Very Impressed with Device and Customer Support!!! I have had my filter for somewhere around 8-9 years now. For the past 6 years I have lived in an area where the water is so bad that I get notices about the dangers of drinking it. This water filter makes my water taste better than bottled water, very clean and pure. I am a "Water for Life" member which includes an extended warranty. It has worked perfectly the entire time until 2 days ago. The valve on the piece that attaches to the faucet now sprays water everywhere. I was concerned that even the extended warranty would not cover a new replacement part after 8-9 years. Low and behold it does! There was no hassle to it. I am very impressed with this company's service and the filter itself. I highly recommend this filter and this company to anyone looking for a wonderful water filtration system!
Date published: 2020-07-13
Rated 5 out of 5 by from Great We have had this style for years. We used to buy it from Mercola - I assume it is the same as it looks exactly the same. Mercola no longer sells this so we are happy to find it here. It is easy to install and use. We've had probably around 3 units over the last ten years. We change the cartridges every 6 months but according to the stats on how much we use, we probably only need once a year. I'd rather do 6 monthly though to be safe. The water always tastes great. After a while the tubes get pretty dirty from the water but they can be changed out easily enough. The water is always clear and great tasting. The water flow is excellent. This is a very convenient, excellent set. Perfect for us as renters also. Easy to take with you if you need to. I highly recommend and will continue to use this brand. The fact it was first endorsed by Mercola means a lot to me also.
Date published: 2020-05-21
Rated 5 out of 5 by from Easy clean water and fresh taste. So far, having the countertop unit has far exceeded the quality and performance of the PUR unit we had mounted on our faucet before. The flow is faster and the taste is clean. We’re happy and are really looking forward to the auto shipment of the replacement filters as needed. This was a valuable purchase.
Date published: 2020-05-19
Rated 5 out of 5 by from Love, love, love. Added one to bathroom sink this Installation is quite simple. I have been usung these for many pears and have bought many for family as well. Save a small fortune in individual bottled water and help cut down on plastic pollution. Love this filter system.
Date published: 2020-05-11
Rated 5 out of 5 by from Love it No longer have to go shopping to carry heavy water jugs and bottles. So easy to install and use. We’re saving money too!
Date published: 2020-04-22
Rated 5 out of 5 by from Easy and quick to setup It's been great to have filtered water without having to install a large unit under my sink.
Date published: 2020-03-29
Rated 5 out of 5 by from Exactly what I wanted! I wanted to upgrade from the standard Brita. This system is what I need. Went with countertop model because of the size of my kitchen and storage space. Easy install. Tasted a difference immediately which was nice but my greatest delight came when I noticed that the electric kettle I use to heat water for tea and to use in my French press for coffee no longer builds up the residue inside from the hard water. Absolutely reccomend this product!
Date published: 2020-02-25
Rated 5 out of 5 by from Great filter if you don't have much space Finally have a piece of mind that contaminants have been reduced and that 'drink more water' is actually going to be better for my health!
Date published: 2020-01-15
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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

Can you get adapters for different tap attachments? Our tap doesn’t screw from the inside, but the outside. And do you ship to NZ?  Thanks 

Asked by: Sarah Jane
To my knowledge, the unit comes with an adaptor for both inside and outside threads on your faucet.
Answered by: Walt
Date published: 2020-08-06

Can you directly drink the water that's filtered from AQ-4000 or do we still need to boil the filtered water?

Asked by: Jack208
Good Morning, After filtering the water with our system it is safe to drink, no need to boil water. If you need further assistance feel free to contact us at 866-662-6885. Thank you, Aquasana Customer Support
Answered by: Aquasana S
Date published: 2020-07-09

Does it include a filter?

Asked by: Texbbq
Yes it does.
Answered by: Herb Be
Date published: 2020-07-08

I had one of these countertop funits before. After several years the outside of the unit became so brittle it began to break off and eventurally I couldn't get the bottom to open to change the filters. Is the current units made of the same material?

Asked by: Nadine the Goddess
I believe so. The filters can be hard to change. 
Answered by: Porter
Date published: 2020-06-07

Does this come with replacement filter cartridges? Or just the water filter machine?

Asked by: Garcia
The filter unit contains two filters that are used to filter water. It does not come with any extras. It filters approx. 600 gallons.
Answered by: Jakpro
Date published: 2020-06-04

My friend needs a water filter for her kitchen water. She had to return a portable unit that connects to the faucet but her faucet can’t connect to the unit.

Asked by: HalI
Just contact aquasana. She could choose to upgrade to the clean water machine pitcher as an alternate because of the faucet. I have to say that I like the countertop attached to the faucet better than this one. The filter on the machine pitcher does not last as long as the counter attached to faucet. I bought some extra filters for that one. However, the cool part about the counter top machine pitcher is that it will remind you when to change the filter. There are pluses and minuses. Hope you give it a try. I had mine for about 2 years now and it still works well.
Answered by: Derrick K.
Date published: 2020-06-03

How much is the countertop model without water for life?

Asked by: Dodie's Mom
Good Morning, The counter top model without water for life is $57.13 as of today I have provided a link down below for further details. https://www.aquasana.com/drinking-water-filter-systems/countertop-attached If you have any further questions contact us at 866-662-6885. Thank you, Aquasana Customer Support
Answered by: Aquasana S
Date published: 2020-05-28

Does it remove flouride 

Asked by: Sweet pea
Let me begin this answer with a statement for the life of me I cannot figure out why this company is asking its customers to answer important questions like this 1 posted! I do know the countertop conversion of air purification system remove chloramine and chloride and a whole list of other toxins. I am however I'm sure that this system will remove fluoride I have scoured the information they have put on the website and there is nothing and any of the literature for this system about removal of fluoride their whole house Reverse Osmosis System does remove fluoride however I hope that is enough information to satisfy your question I would also recommend you calling them and asking them the question as well
Answered by: Surferdf
Date published: 2020-05-17
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