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: Brushed Nickel
  • all-metal brushed nickel faucet
  • all-metal chrome faucet
  • oil rubbed bronze faucet
2-Stage Under Counter Water Filter - Brushed Nickel is rated 4.5 out of 5 by 859.
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50% OFF 2-STAGE UNDER COUNTER SYSTEMS - ends today!
  • MSRP: 199.99
  • Sale: 99.99

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

Questions? We can help

  • 866-662-6885
  • MON–FRI: 8AM–7PM 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

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

Stylish
Designer Faucet

Match your kitchen d├ęcor 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 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 Reused old Aquasana faucet New filter, old faucet installed .................
Date published: 2019-07-17
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
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Learn More

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. The AQ-5300+ also contains Bluetooth connectivity so you can download our iPhone App and get alerts for when it is time to change your cartridges and even order new replacements straight from the App!

  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 to 800 gallons, a 44% increase in flow rate at .72 gallons per minute and Bluetooth connectivity for filter tracking.

  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.

Learn More

User Q & A

Can I use my own original kitchen faucet?

Asked by: Librarian 1502
Hello, 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. Thank you, -Aquasana Support
Answered by: Aquasana S
Date published: 2019-10-03

We love the filtration system except the faucet drips for a minute when you shut off. Is there a washer that can be replaced on these somewhere. My husband wants to take apart, but I need to know if it can be taken apart to replace a washer somewhere 1st,

Asked by: Notathome
Hello, Please call our department at 866-662-6885, to discuss a potential solution for your home. Thank you, Aquasana Support
Answered by: Aquasana S
Date published: 2019-09-23

What is the difference between the stage 2 under the counter system, and the stage 3? Than you.

Asked by: AlishaL
Hello, 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 to 800 gallons, a 44% increase in flow rate at .72 gallons per minute and Bluetooth connectivity for filter tracking. Thank you, Aquasana Support
Answered by: Aquasana S
Date published: 2019-09-21

Will it remove calcium?

Asked by: Jim the homeowner
Hello Jim, Thank you for your question the 2-stage will not remove calcium. If you have any further questions please contact us at 866-662-6885. Thank you, -Aquasana Support
Answered by: Aquasana S
Date published: 2019-09-03

What diameter hole will the faucet cover? The existing hole in my sink is fairly large.

Asked by: Colonel 26
The round circular piece that covers the hole is just a little shy of 1 3/4” so I would think you’d be okay of the hole is 1 1/2”. 
Answered by: rdhc
Date published: 2019-08-24

I have a question: filters it to 0.5 microns or how much? And does it filter out also fluoride or I have to put some filter in addition for fluoride?

Asked by: Anu Põllusaar
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 Support
Answered by: Aquasana S
Date published: 2019-08-19

Can I buy just the faucet without the system? I just want to change the faucet finish. The filtration system is great

Asked by: Laurap
Hello, 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. Thank you, -Aquasana Support
Answered by: Aquasana S
Date published: 2019-08-19

What is height of faucet on Aquasana 5200?

Asked by: Alana
Hello Alana, 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 Support
Answered by: Aquasana S
Date published: 2019-08-06
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