Drinking Water Filter
3-stage Under Counter

The best performing water filter plus an increased capacity pre-filter.

5300 Plus under counter faucet

Get 44% faster water flow plus 200 more gallon capacity
& Bluetooth filter tracking! Shop Now

Select a faucet finish: Brushed Nickel
  • all-metal brushed nickel faucet
  • all-metal chrome faucet
  • oil rubbed bronze faucet
3-Stage Under Counter Water Filter - Brushed Nickel is rated 4.6 out of 5 by 1602.
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50% OFF 3-STAGE UNDER COUNTER SYSTEMS until Sep 23
  • MSRP: 285.70
  • Sale: 142.85

Save 50% + free shipping with Water for Life $142.85

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 15x the capacity of the leading gravity-based pitcher at only 9¢ per gallon with Water for Life.

Pure Performance

Increase Performance

Extend the life of your system. Improve effectiveness.

Three Stage System features a 20 micron pre-filter to capture rust, sediment and silt that can clog your system. Extends filter life capacity to 600 gallons!

Pure Performance

A Smarter System

The Aquasana AQ-5300 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.

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

Help & Support

Video Help

  • How to install the Claryum 3-stage water filter
  • How to replace the AQ-5300-R under counter filters

Installing the 3-stage under counter system

Replacing the 3 filters in the AQ-5300

Learn More

Read the Reviews

Rated 5 out of 5 by from Great tasting water We really enjoy our new water filter. The water tastes great and it's wonderful to have the dedicated faucet for our filtered water. It looks so nice. We had a one filter on the counter filter previously. It was unsightly and awkward to use. Knowing now that our drinking water is removing so many more contaminants gives us peace of mind. We are no longer buying bottled water. YAY!
Date published: 2019-09-08
Rated 5 out of 5 by from Overall satisfaction with system So, the system is going ok. My husband installed it in one afternoon. The water tastes good and has no smell.
Date published: 2019-08-22
Rated 5 out of 5 by from Easy install Easy install, removed bad taste and odor from our sub-division well(s).
Date published: 2019-08-21
Rated 5 out of 5 by from Positive Impression so far The installation was straight forward. I needed to make a small mounting plate for the sink since the hole was larger than 1 inch to fit the faucet but that was really no big deal. Everything else went as described in the instructions. So far the system seems to be working fine. The flow is a little slow, but that's to be expected since the water has to work itself through the filtering system.
Date published: 2019-08-08
Rated 5 out of 5 by from So far it is great! Water is very clean tasting, no odor. It gives me peace of mind. We had a plumber install it for us.
Date published: 2019-08-07
Rated 5 out of 5 by from Filter was as advertized My three stage filter was as advertised, unit installed easily and has provided good tasting water. No more bottled water and bagged ice.
Date published: 2019-07-28
Rated 5 out of 5 by from Under-sink water filter I am so happy to have the under-sink water filter in our master bathroom. It is great to be able to drink water, brush teeth, use the water pik all with clean filtered water. I am very happy with this filter.
Date published: 2019-07-20
Rated 5 out of 5 by from Like the looks ...works well Like new filter looks along with knowledge contaminates are being removed
Date published: 2019-07-17
Rated 5 out of 5 by from Excellent product We love the 3 stage under counter water system. It was easy to install. The water tastes clean and delicious now. We left the filtered water in a pot on the countertop for 3 days to see if it changes the taste - nothing happen, still tasted clean and delicious. We recommended this system already to family and friends.
Date published: 2019-04-13
Rated 5 out of 5 by from Love this filter We are drinking more water since we put this filter in last month. Make sure you make all the connections properly and it was a breeze to install. The water looks cloudy as you flush the water through the new filters but be patient. The water is great.
Date published: 2019-04-10
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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

How the tank filled?

Asked by: Lin Chai
Hi, there is no tank to fill. It is constant flow on demand, like faucet.
Answered by: Rose444
Date published: 2019-09-08

I've installed the system and when I turn the water on, water gushes out from the filters. I've tighten them and every connection but water still gushes. What could be the issue?

Asked by: KennyS
Hello Kenny, Please contact us at 866-662-6885 to help provide the solution for your system. Thank you, -Aquasana Support
Answered by: Aquasana S
Date published: 2019-09-03

does it give signal ,it is time to change the filter?

Asked by: FARRA
Hello Farra, Thank you for your question. The Aquasana AQ-5300 alerts you when it's time to change your filters. No more guessing if and when you need to replace your old filters. If you need further assistance contact us at Support@aquasana.com Thank you, -Aquasana Support
Answered by: Aquasana S
Date published: 2019-09-03

What is the dimensions of the filter unit? Considering installation in my motor home.

Asked by: John RV
Hello John, The 3-stage Under Counter system measurements are as follows: Height: 9" Width: 12" Depth: 4.25" 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

Does the smaller 3 stage under sink water filter remove fluoride from the water?

Asked by: Nikki Schubert
Hello Nikki, 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 If you have any further questions please contact us at 866-662-6885. Thank you, -Aquasana Support
Answered by: Aquasana S
Date published: 2019-08-19

what are the dimensions of the under counter components?

Asked by: Margrit
Hello Margrit, The 3-stage Under Counter system measurements are as follows: Height: 9" Width: 12" Depth: 4.25" If you have any further questions please contact us at 866-662-6885. Thank you, -Aquasana Support
Answered by: Aquasana S
Date published: 2019-08-19

How many months till i replace the filters?

Asked by: Tel a.
Hello, The recommended time for a filter change for the Claryum 3-Stage under the counter is 6 months or 600 gallons. Whichever comes first. - Aquasana Support
Answered by: Aquasana S
Date published: 2019-07-11

I have a three filter aqua sauna under kitchen sink. Is it possible to hear a clicking sound if filter needs to be replaced?

Asked by: Waterman
Hello, Thank you for your question. Your system includes an alarm that will beep when it is time to change your filters. We also include a new alarm battery with every replacement filter shipment. If you have any further questions please contact us at 866-662-6885. Thank you, Aquasana Support
Answered by: Aquasana S
Date published: 2019-07-03
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