Drinking Water Filter
2-stage Under Counter

Designed to be the best performing drinking water filter on the market.

5300 water filter

Get 100 gallons more plus a pre-filter with our 3-stage filter Shop Now

Select a faucet finish: Chrome
  • all-metal brushed nickel faucet
  • all-metal chrome faucet
  • oil rubbed bronze faucet
2-Stage Under Counter Water Filter - Chrome is rated 4.5 out of 5 by 890.
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$9499 2-STAGE UNDER COUNTER SYSTEMS - limited time!
  • MSRP: 199.99
  • Sale: 99.99

Save 50% + free shipping with Water for Life $99.99

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

Easiest filter Replacement

Replacements engineered for ease. No need to disconnect hoses or water lines. Eco-friendly filter housing easily twists off so replacing your filters is a snap!

Pure Performance

Convenience & Value

Fewer filter replacements. More clean, great-tasting water.

One Aquasana Claryum® filter gives you 12x the capacity of the leading gravity-based pitcher at only 10¢ per gallon with Water for Life.

Pure Performance

A Smarter System

The Aquasana AQ-5200 alerts you when it's time to change your filters. No more guessing if and when you need to replace your old filters.

Pure Performance

Designer Faucet

Match your kitchen décor with a designer faucet featuring all metal construction.

How It Works

Superior Filtration

Selective Claryum® Filtration

Reduces 77 contaminants while retaining beneficial minerals for optimal hydration.

Easy to install, replace & maintain

Filter lasts up to 6 months and features easy twist-off design.

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.

  • 500 gallons
  • 6 month filter life
  • 1 year warranty
  • 90 day guarantee

Help & Support

Video Help

  • How to install the 2-stage under counter system
  • How to replace the 3 AQ-5200 under counter filters

Installing the 2-stage water filter

Replacing the AQ-5200's filters

Learn More

Read the Reviews

Rated 5 out of 5 by from cleans the water well...filters are too expensive enjoy the fresh taste of this filtered water..you can tell when to change filter, water taste sour usually 6-8 months
Date published: 2020-04-29
Rated 5 out of 5 by from Love it Used my faucet sprayer hole for new aquasana faucet and then replaced the old kitchen faucet. Which lead to replacing old plumbing drains. Very pleased.
Date published: 2020-04-25
Rated 5 out of 5 by from So far so good. We replaced our older Aquasana under sink system because it was leaking badly. I hope this one hold up better. I love this filtered water.
Date published: 2020-04-21
Rated 5 out of 5 by from Great product love this set up. Installed it myself. Easy to do.
Date published: 2020-04-10
Rated 5 out of 5 by from Easy to install and great tasting water I am finding myself literally drinking twice as much water as before. It has no after taste and tastes so clean. My family is enjoying the convenience of having the water available at any time also without having to wait for the pitcher to fill up.
Date published: 2020-03-11
Rated 5 out of 5 by from Good impression We are enjoying our filter and it was fairly easy for my hsuband to install. Water tastes great and we rest easy knowing it is eliminating many of the impurities and chlorine that we wanted to avoid.
Date published: 2020-02-25
Rated 5 out of 5 by from AQUASANA A GREAT FILTER SYSTEM The AQUASANA filter is great. It was easy to install with great instructions and you can which a video on line too. The water tastes so much better than the other filter systems we have used in the past.
Date published: 2020-02-16
Rated 5 out of 5 by from Great product Water tastes clean, absolutely no aftertaste. Installation was easy, but you must be careful to leave room to insert the waterlines into the filter assembly. They have to go in far enough to insure no leaks so be sure to allow room to push them in all the way.
Date published: 2020-02-02
Rated 5 out of 5 by from Comments on Aquasana filter ssystem I am pleased to have the filter in place and to know that the water I'm ingesting is clean and free from almost all toxins.
Date published: 2020-02-01
Rated 5 out of 5 by from Tried, Tested and True Easy to install -- and the NSF certifications give me confidence in the product.
Date published: 2020-01-22
Rated 5 out of 5 by from Does the job! Product is easy to install and tastes great. Perfect solution for the kitchen.
Date published: 2020-01-17
Rated 5 out of 5 by from Works great! We love our new water filter. Easy to install and great taste
Date published: 2020-01-13
Rated 5 out of 5 by from much cheaper than buying bottled water I've been using a customer for at least ten years and am still using the same under sink unit and faucet. The water tastes great and installation is easy. Not only cheaper than buying bottled water, its environmentally friendly. I use the water when cooking too. I have also purchased Aquasana reusable glass water bottles. So much better than drinking out of plastic. No waste to recycle or dump in landfills. To those report the system leaks or impacts water pressure or makes water taste salty, all I can say is the system was installed improperly and/or the user did not allow enough time to flush the system before tasting the water.
Date published: 2020-01-01
Rated 5 out of 5 by from Great Product Product was delivered quickly and was very easy to install. It is a medium size unit and really doesn’t take up much space under the cabinet. I had read that the flow was somewhat slow and I agree it is not fast, but in order to effectively filter water, the flow can’t be too fast. An effective filter will restrict the flow. So I accept the marginally slow flow rate knowing the water quality is high. Good water is my primary goal.
Date published: 2019-12-26
Rated 5 out of 5 by from Love my Aquasana! I love my Aquasana water filter! It has made my drinking water delicious! I noticed immediately that my coffee tasted so much better. Installation was very easy, and the brushed nickel faucet is very attractive.
Date published: 2019-10-13
Rated 5 out of 5 by from Excellent Peace of mind of water quality and removes odors and water tasts great.
Date published: 2019-10-08
Rated 5 out of 5 by from Easy to install, wonderful to drink! I'm so pleased I made this purchase, I couldn't have asked for a better experience. Love my water!
Date published: 2019-09-11
Rated 5 out of 5 by from Great tasting safe drinking water Installation was easy. I used the existing hole in my granite where my soap dispenser was. It's a cute little spout that does the trick of giving us better water. I don't miss buying gallons of spring water! Tastes as good! Perfect for what we needed.
Date published: 2019-09-09
Rated 5 out of 5 by from Overall impression of my new filter All is good...take my time with the install. No leaks on initial turn on. So, this initial review is all good.
Date published: 2019-08-31
Rated 5 out of 5 by from Great water flow easy to install This was a replacement unit for one that I had installed 10 years ago and was dissatisfied with water flow. The new one was easy to install, water tastes fine and water flow rate is greay
Date published: 2019-08-31
Rated 5 out of 5 by from Easy to install, water tastes great Installation is quite easy, but that totally depends on your sink configuration. Resulting water tastes great, and we were pleased to get the extra counter space by eliminating our counter-top machine. Water throughput is somewhat less than a refrigerator dispenser, but not a deal breaker for us.
Date published: 2019-08-28
Rated 5 out of 5 by from 2-Stage Under Counter Water Filter We love the new unit. We were happy with the 15 yo Aquasana 2-stage filter we had and thus replaces it with the new model, Love the new model, works as well and easier to change the filters.
Date published: 2019-08-22
Rated 5 out of 5 by from Easier Install Than Anticipated! I am not the handiest person (I am a computer programmer by trade) so my father was going to install the system for me, but in the interim, I decided to give it a shot and was surprised how easy it was. It took me about 2 hours, but given my general lack of expertise with tools and plumbing, I was very happy and impressed I was able to pull it off. The instructions were very straightforward and the logic of the system is not complex. The system runs beautifully and I'm really happy with it. The waterflow is faster than the counter-top units and the water tastes just as good or better. If you haven't tried Aquasana water, it is far better than Brita or Pur-- it turns municipal water into better-tasting water than most wells (in my experience). Awesome product that nearly anyone can install themselves!
Date published: 2019-06-01
Rated 5 out of 5 by from So far works great I ordered the 2 stage under counter filter after talking to a salesperson who was helpful. Package arrived about a week later and had all the necessary components. Installation was straightforward following the video instructions. Hardest part was drilling a .50” dia hole in our quartz countertop but youtube videos helped with that part. Connecting to the water supply went smoothly with no leaks. Water flow rate isn’t great but more than adequate for our needs. The 3 stage would have a higher flow rate but more difficult to fit under our sink. We have using the filter for about a month and it has been great.
Date published: 2019-04-24
Rated 5 out of 5 by from Perfect for my needs! Straightforward, easy install for a separate drinking water faucet at the kitchen sink. Filter assembly fit perfectly in the space available, and provided tubing was enough to get the filter out close enough for easy filter changes. Very happy with the filter and service. Excellent product info and support available on website.
Date published: 2019-04-02
Rated 5 out of 5 by from Easy to install We have enjoyed our new Aquasana water filter system. Our local water often had high chlorination levels which really affected the taste of our water. Our filtered water tastes fantastic.
Date published: 2019-02-26
Rated 5 out of 5 by from Clean water at my sink. I am enjoying the clean water in my kitchen. We now do all our coffee, tea, soup, and pasta boiling with clean water from our Aquasana filter. It was so easy to install. Just followed the directions. My wife really likes it.
Date published: 2019-02-25
Rated 5 out of 5 by from Love this filter and company We used a filter that cost 6x this price prior to buying this one and it was really not that much better so when it broke down we looked for a better solution at a better price. We've been using Aquasna for many years now. The Company has always stood behind their products. We upgraded to this new system when it came out about 3 years ago and it's super easy to change the filters. Love the water for life program as it takes the thinking out of it and the added discount makes it a no brainer. The water tastes great and we wouldn't be without it. We've referred several friends who have bought one since we got ours. :)
Date published: 2019-02-11
Rated 5 out of 5 by from So far, so good Haven't had it installed a long time but like the small faucet that allows use of the regular faucet while getting water. Have used a filter for a long time, so can't speak to a difference in taste, but definitely like the convenience of this vs a faucet mount filter that needs more frequent replacement
Date published: 2018-12-31
Rated 5 out of 5 by from Easy We replaced our previous aquasana counter water filter with this newer model. The handle works much better and the filter system is much more user friendly. We love it and it’s used A LOT between drinking water, humidifier water and now the dog has been prescribed to be on filtered water due to a kidney condition
Date published: 2018-12-30
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Aquasana FAQs

  1. Do I have to pay for a plumber to install the system?

    Our under counter drinking water filter systems are 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 (three months for the single-stage system) or the specified gallon capacity to prevent the growth of bacteria in the system. The AQ-5100 Single Stage has a capacity of 200 gallons, the AQ-5200 Two-Stage has a capacity of 500 gallons, the AQ-5300 Three-Stage has a capacity of 600 gallons and the AQ-5300+ Three-Stage has a capacity of 800 gallons. Replacement filters cost $29.99 for the AQ-5100, $59.99 for the AQ-5200, $64.99 for the AQ-5300 or $79.99 for the AQ-5300+, 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. The performance indicating device on the AQ-5200, AQ-5300 and AQ-5300+ systems will sound a beeping alarm and flash red when it is time to change your cartridges.

  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?

    We have designed this system to minimize the environmental impact of our replacement elements, which are over 95% biodegradable carbon. 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 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. What should I do?

    To install an under counter system, you can remove the existing sprayer or soap dispenser on your sink 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. If you do not have an existing hole in your sink from a sprayer or soap dispenser, we also have a countertop drinking water filter that conveniently screws on to most kitchen faucets.

  6. What is the size of the brass T-fitting for under counter and premium under counter unit?

    The most common size is 3/8" which originally comes with the system purchase. In rare cases some customers may need a 1/2" T-fitting which is sold separately and is available for purchase through technical support.

  7. What size hole do I need in my sink for the under counter and premium under counter systems?

    The faucet that is included with our systems requires a 1/2" hole.

  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. What is the difference between the single-stage, 2-stage and 3-stage under counter systems?

    All of our drinking water systems use the same Aquasana Claryum® filtration technology. The single-stage system lasts 6 months or 200 gallons before the cartridges need to be replaced. Our 2- Stage system has a higher capacity than the single-stage, giving you 6 months or 500 gallons of clean, filtered water. The 3-Stage system includes a 20 micron pre-filter before the two Aquasana Claryum® filters. This pre-filter increases the capacity of the system from 500 gallons to 600 gallons. In addition, it improves flow rate in high sediment areas. The 3-Stage Max Flow system adds even more capacity for 800 gallons of filter life and a 44% increase in flow rate at .72 gallons per minute.

  14. I have an existing side faucet from a previous system. Can I use that with my new Aquasana water filter?

    We recommend that you use the faucet provided. We have extensively tested the system with the faucets included. The faucets are NSF Certified to have no lead content. In addition, they will not impart any unwanted chemicals into your water. If you choose to use another faucet, we recommend that you have a plumber install the system to ensure no leakage occurs. We also recommend that you install an NSF Certified faucet to ensure the health benefits of your new Aquasana water filter.

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User Q & A

I been using aquasana AQ-4000 undersink for many years now and I love it, but now I have to move and I can't take it with me. I still have a lot extra filters AQ4035 left , what type of faucet I can use?

Asked by: joss
Hello, 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 at 866-662-6885. Thank you, Customer Support
Answered by: Aquasana S
Date published: 2020-09-22

I currently have this filter/faucet system, however the faucet has started dripping and needs to be replaced. Can the faucet be purchased separately from the filter system?

Asked by: Dorothy
Hello, Thank you for reaching out to us. Yes, we can replace the faucet. Please contact us at 866-662-6885 to place the order and help further assist. We look forward to hearing from you. Thank you, Customer Support
Answered by: Aquasana S
Date published: 2020-07-21

What is the height of the faucet on the 2 stage system?

Asked by: Anonymous
Hello, Thank you for contacting us. The height of the faucet is 10.5". If you have any further questions please contact us at 866-662-6885. Thank you, Aquasana Customer Support
Answered by: Aquasana S
Date published: 2020-08-07

If I order the clarion will you take back 4 unused filters for the clear countertop unit as a credit?

Asked by: Bj Ross
Hello, Thank you for reaching out to us. Unfortunately we can not take back filters for a credit however, please contact us at 866-662-6885 to help further assist. Thank you, Aquasana Customer Support
Answered by: Aquasana S
Date published: 2020-07-10

does the two stage filter remove fluoride?

Asked by: grammie
Hello,  Reverse osmosis is the only way to remove fluoride from your water. Our OptimH20 Reverse Osmosis system removes over 95% of fluoride from your water. Take a look, let us know if you have any questions. https://www.aquasana.com/drinking-water-filter-systems/reverse-osmosis-claryum Thank you, Aquasana Customer Support
Answered by: Aquasana S
Date published: 2020-07-09

Are these faucets set up to work alongside an air gap? 

Asked by: Tch2o
I installed the Aquasana faucet where the air gap could go in the third hole in my sink, so don't use the air gap. Hasn't caused any problems in ten years. I am on my second filter system now, they have been great for our area (chlorine especially.) Good luck!
Answered by: SierraFred
Date published: 2020-06-06

Is it easy to install self? Speaking of the under sink system with the 2 filters. Thank you

Asked by: Marcodi2001
It depends.  Do you have a hole in the sink to mount the faucet?  If not you need to drill one.  Also, do you have a water line connection Tee already?  If not you need to cut the pipe and use a compression style tee for the cold water supply.  Besides that it’s just a couple of screws to mount it.
Answered by: Knewthoughts
Date published: 2020-05-30

My husband and I drink one gallon of water combined a day which means 30-gallons a month. If the 3-stage filter lasts 600 gallons wouldn’t that mean that we need to replace the filter every 20-months. Why do you recommend changing every 6-months then?

Asked by: SwannFit
Good Morning, We would love to transfer this to a team specialist who is best-suited to answer any questions or concerns you may have. Kindly email us directly at support@aquasana.com or contact us directly at 866-662-6885, Monday thru Friday from 8am-6pm CST, and weekends from 9am-5pm CST. Thank you, Aquasana Support
Answered by: Aquasana S
Date published: 2020-06-14
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