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 756.
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50% OFF 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
  • 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

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.

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 68 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 certified to NSF/ANSI Standards 42, 53, 401 + P473.

  • 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 Very sturdy, works well. This is the second one I purchased. I moved so needed a new one. This one's design was updated but is fine.
Date published: 2017-10-03
Rated 5 out of 5 by from Great Taste! Easy installation for an over 60 yr old woman and the taste of this water is better than that from the iSpring RO system it replaced.
Date published: 2017-09-29
Rated 5 out of 5 by from Fantastic! This 2-stage replaced the Aquasana countertop version we had been using successfully for over 10 years. This is a HUGE improvement, and we liked the old one. Water is delicious, and the water pressure is fantastic. We were not getting enough water pressure using the countertop version. It's great to have a dedicated faucet.
Date published: 2017-09-29
Rated 5 out of 5 by from Love it! We have been enjoying our filter and faucet. It's doing great and looks really good too.
Date published: 2017-09-25
Rated 5 out of 5 by from Looks wonderful! I had a new sink installed so went from counter top model to undersink model. Love the new look and I can use the faucet and filtered water spigot at same time AND it seems to have quicker output than old model I had. Great all the way around!
Date published: 2017-09-21
Rated 5 out of 5 by from Great taste Had dual filters for approximately three months. Makes water taste good again.
Date published: 2017-09-21
Rated 5 out of 5 by from Loving my water filter Purchased it 3 months ago. I have a copper sink and oil rubbed bronze matches great. It was easy to install and I love having my filtered water at my sink as opposed to the fridge. Water tastes great! Very happy!
Date published: 2017-09-21
Rated 5 out of 5 by from very good filter Purchased as replacement for previous model. Works very well, water flow is excellent. saves us from buying bottled water.
Date published: 2017-09-21
Rated 5 out of 5 by from Replace your refrigerator water filter! Easily installs inline on your fridge water line!!!
Date published: 2017-09-18
Rated 5 out of 5 by from Great upgrade. My second 2 stage unit. Left 1st one in old home. This one with new filters and simple install. Very happy.
Date published: 2017-09-17
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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 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

Hi, I'm going back out to Saigon (HCMC), Vietnam for the year. Is this filter system sufficient for tap water overseas in countries in Southeast Asia, Mexico etc?

Asked by: Spencer
Hi Spencer, Please take a look at the performance data sheet for the system, and compare it to the quality of water that you will be utilizing. - http://cdn.aquasana.com/assets/AQ-5200_Performance_Data.pdf The system is not designed to be used with water that is microbiologically unsafe, as it does not have a UV to sterilize Bacteria and viruses. Thank you, Aquasana Customer Support
Answered by: Aquasana Customer Support
Date published: 2017-09-30

I find it impossible to unscrew the lid from the sump to change the filter every 6 months. I have had this design since it came out. I hand tighten as lightly as possible each time, but then 6 months later dread the impossible task. Help??!!?

Asked by: Erin
Hi Erin, thank you for your question. We do offer a wrench to help remove and open the sumps. Just give us a call at 866.662.6885 and a member of our service team can get one shipped out for you. We look forward to hearing form you! Thank you, Aquasana Customer Support
Answered by: Aquasana Customer Support
Date published: 2017-10-05

How effective is the AQ-5200 or 5300 at removing hexavalent chromium? I see that RO systems are rated for chromium, but not these models. I want to avoid RO if possible, but my city has 0.2 ppb chromium that I want to reduce as much as I can

Asked by: Dominic
Dominic, thank you for your interest in Aquasana! These systems are not certified for the reduction of chromium 6, you will need to utilize RO filtration to take care of this contaminant. Our RO system does have a remineralizer to add the healthy minerals back in before you drink the water. It also has one of the best waste ratios on the market. our system only creates 3 gallons of waste water per 1 gallon of drinking water. Most other ROs will waste at least 5 gallons per 1 gallon of drinking water. Thank you, Aquasana Customer Support
Answered by: Aquasana Customer Support
Date published: 2017-09-29

Does this system reduce fluoride?

Asked by: Jules
Jules, thank you for your question! The 5200 system is not NSF certified to reduce or remove fluoride. For 95.7% fluoride reduction, check out our under counter Reverse Osmosis system- http://www.aquasana.com/drinking-water-filter-systems/reverse-osmosis-claryum. Please let me know if I can be of further assistance. Thank you, Aquasana Customer Support
Answered by: Aquasana Customer Support
Date published: 2017-09-29

5200 unit keeps beeping not just the 5 times noted at installation  Just installed unit 

Asked by: Johnny
Hi Johnny, When a battery is beeping non stop, it usually means that it is either inserted incorrectly, or you got a defective battery. This is nothing to worry about, you can just give us a call at 866.662.6885 and we will get a new one sent out ASAP. In the meantime, you can continue using the system and drinking your filtered water. The battery serves as a way to measure flow and keep track of time, but doesn't actually serve any function in the filtration process. Thank you, Aquasana Customer Support
Answered by: Aquasana Customer Support
Date published: 2017-09-29

Hello...I live in the city of Milwaukee (WI) and it was told to me that we can purchase filters at a possibly discounted rate, as our city has decided to use Aquasana as their main water purifier. Being a 10 yr user, am I entitled?

Asked by: piper0859
Piper, thank you for reaching out! We would be happy to get you set up with a filtration system. This offer is not going to be valid through our website, but if you reach out to us directly at 866.662.6885 a member of our sales team will get you taken care of! We look forward to hearing from you. Thank you, Aquasana Customer Support
Answered by: Aquasana Customer Support
Date published: 2017-09-29

I don't need the faucet. Just bought one that matches my sink faucet. Can I just buy everything but the faucet?

Asked by: Torpeto
Thank you for your question! We package the entire system together, so we do not have a way to sell you just the system without the faucet. If you already have a beverage faucet that is compatible with our system, then you can certainly use it instead of the one that comes with the unit though! Thank you, Aquasna Customer Support
Answered by: Aquasana Customer Support
Date published: 2017-09-29

I have the two stage system and am about to order new filters.  I was wondering if you would make a filter that also makes the water slightly alkaline?   I would really like this

Asked by: Edward
Hi Edward, Thank you for your interest in Aquasana! None of our filtration systems are specifically designed to alter the pH of your water. Our filtration systems can certainly help to enhance your waters pH, however the pH level of your water after filtration will depend largely on the quality of your water. Thank you, Aquasana Customer Support
Answered by: Aquasana Customer Support
Date published: 2017-09-29
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