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 1588.
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50% OFF 3-STAGE UNDER COUNTER SYSTEMS until Mar 25
  • 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–6PM CDT
  • SAT–SUN: 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 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.

  • 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 Loving the fresh water, quite an easy install. This was on our list for years, wish i'd done it sooner. I did not use the faucet but instead ran the tank to our fridge, giving us fresh and cool water and ice. To do this I needed some extra parts from Depot, which complicated the job but it was worth it. The fact that the system uses sharkbite style connectors is great. Follow the instructions very carefully. Push HARD to get those hoses into the clamp. To get them out, if you make a mistake, watch a Youtube video on removing sharkbite connectors. it's tricky, but do it once and you get the jist.
Date published: 2019-03-10
Rated 5 out of 5 by from Great quality! Very impressive! We love our Aquasana filters! We used to own an RO but we never liked the idea of removing all minerals. The filters are just enough to remove all contaminants specially the chlorine! Great product!
Date published: 2019-02-22
Rated 5 out of 5 by from Very good system My family love the taste, safe us from using bottle water.
Date published: 2019-02-19
Rated 5 out of 5 by from Love these filters I had the 3 stage under counter filters installed on the back wall instead of on the side wall of the cabinet a week and a half ago . I think it will be easier to change filters and takes up less space. The water taste better than spring water. The faucet looks nice and I don't find the water flow slow considering it's going through 3 filters. I did put containers under the filters just in case of a leak and will buy a small water alarm at Home Depot. But am not really concerned about leaks and believe new o rings can be purchased anywhere for the filters when needed. I love these filters. Much more convenient than bottled water and take up much less space than the countertop type I used to use. Just wish floride was removed.
Date published: 2019-01-27
Rated 5 out of 5 by from Easy to install, no plumbing experience needed! I bought this as a recommendation to rid my drinking water from PFAS (currently a huge issue in Michigan). I am thrilled on how easy it was to install. As a women I would not say I am mechanically inclined, but I installed it easily in an afternoon without help and using relatively simple hand tools. Our sink had a hole already predrilled which worked perfectly for the faucet. The finish matches the sink and looks like it was there from the very start. This also produces the best tasting water that I have ever had. Plus knowing it is free of basically everything is wonderful too. I use this for cooking, making tea or coffee, and of course for drinking and even watering my plants which need rainwater. So far no complaints and no leaks! Looking forward to the next 6 months without worry. Plus having the Water For Life subscription lowers the price of the filters and I don't have to worry about not having them on hand when they need replacing. This is by far easier than remembering to fill a pitcher every time you want filtered water. :)
Date published: 2019-01-04
Rated 5 out of 5 by from Overall experience Everything is as described. Easy installation, good quality and great tasting water. Nothing more to say 5 stars Aquasana
Date published: 2019-01-03
Rated 5 out of 5 by from It’s important to drink filtered water We love our Aquasana water filter. Once it was installed, it’s so easy to pour a clean glass of water.
Date published: 2018-12-31
Rated 5 out of 5 by from Aquasana 3-stage filter under the counter system The Aquasana is so convenient. It saves me buying bottled water. It is so worth the price I paid for it and the price I paid to have it installed, and the water tastes better.
Date published: 2018-12-28
Rated 5 out of 5 by from Seems to live up to my expectations. Water tastes I enjoy drinking water now and the peace of mind that contaminants are removed.
Date published: 2018-12-23
Rated 5 out of 5 by from Safe drinking water This is my 3rd Aquasana 3 stage under the sink water filter. The first one I had was a 2 stage and as soon as you came out with the 3 stage I ordered it. When my daughter bought her home I purchased one for her and my son recently purchased his home and of course I got him one. All have the water for life so no worries about having filters on hand. Easy install and worry free from drinking or cooking with water contaminents.
Date published: 2018-12-23
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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 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

On this system, does the change filter warning sound after a certain period of time, or after a certain number of gallons of water have passed through the system?

Asked by: Mark W
There is no warning sound. I change the filters when the flow of water gets very slow which indicates to me that the filters are clogged
Answered by: AquasanaFan
Date published: 2019-02-23

I have an Aquasana that I love as drinking water (above the sink). Can I use this for an ultrasonic humidifier as well?

Asked by: wendy j.
Do you mean by filtering the water into a pitcher and pouring it in to the humidifier or by plumbing it to the humidifier? I would assume both would work fine either way. I use mine for my ice maker and my dogs get filtered water as well!
Answered by: Sphere360
Date published: 2018-12-07

Do you have a recycle program for the used water filters?

Asked by: PO Ho
No, not to my knowledge. However I live in a rural area in West central Indiana and none exists in my area.
Answered by: Old pipefitter.
Date published: 2018-11-30

What is the measurement of the system?  We have very little space to under our sink.   Thanks!  Kim

Asked by: KBM1863
You'll need 12 inches in length and it is 4 inches wide. Ours is in a small space too.
Answered by: Lily's Mom
Date published: 2019-01-28

Faucet is dripping. It is ~4 years old.  How do I fix it??? 

Asked by: GatorLuis
Hello! I'm sorry to hear that you are having trouble with your filtration system! We certainly want to help you resolve this as soon as possible. Please contact our customer service representatives at 866-662-6885 and, we will be happy to assist. Thank you, Aquasana
Answered by: Aquasana Service Team
Date published: 2019-01-20

Does this remove fluoride?

Asked by: Danielleb
Danielle, Thank you for your question. Unfortunately, the AQ-5300 will not help to reduce nor remove fluoride from the drinking water. The Aquasana OptimH2O is NSF Certified to remove over 95% of fluoride from your drinking water. Thank you, Aquasana
Answered by: Aquasana Service Team
Date published: 2019-01-17

Can I use my own fawcett (the one that I already have installed in my kitchen) or do I need to buy the whole kit with the fawcett?

Asked by: Luciana
Luciana, 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
Answered by: Aquasana Service Team
Date published: 2018-11-06

After replace the filter (model AQ-5300R), water does not come out. What I did wrong?

Asked by: Dao Nguyen
Dao, Thank you for your question. We certainly want to help resolve this soon! Kindly contact our service team at 866.662.6885 and a team member will be glad to provide the trouble shoot steps needed and send replacement parts. Thank you, Aquasana
Answered by: Aquasana Service Team
Date published: 2018-11-06

I have a 3 stage under counter filter. What would be the grains of hardness in this filtered water?

Asked by: Berly
Total Dissolved Solids (TDS) are the total amount of mobile charged ions, including minerals, salts or metals dissolved in a given volume of water, expressed in units of mg per unit volume of water (mg/L), also referred to as parts per million (ppm). Aquasana water filters are not designed to reduce the TDS in your water. TDS meters tell you the concentration of dissolved minerals and metals in your water but are not an accurate measurement for contamination. Aquasana systems remove harmful TDS, like dissolved lead, but because our selective filtration leaves in calcium, magnesium, and potassium, and minerals are dissolved solids, there will still be a measurable amount of TDS in your filtered water. TDS can also increase during the Potassium Ion Exchange Process. In order to remove lead and mercury, the Aquasana Filtration system has to exchange it for potassium. For every lead Ion removed, two potassium ions are added to the water. So a TDS reading has nothing to do with the chemicals that are being removed. which you can see here: http://cdn.aquasana.com/assets/AQ-5300_Performance_Data.pdf This is another link that may be helpful in answering your question: http://www.aquasana.com/education/tds-meter-what-is-it-and-do-you-need-it
Answered by: Aquasana Service Team
Date published: 2018-10-31

Is your undercounter 3-stage filter compatible with other water dispenser faucets? My client is looking at other options that will better match their kitchen faucet. Thank you.

Asked by: Benj
The system was designed and certified with the faucet included with our system. Because it has not been tested with other faucets, we are unable to determine if the system will operate as designed.
Answered by: Aquasana Service Team
Date published: 2018-10-15

Hi, I'm using AQ-5300R 3-stage under sink water filter. According to the manual, This filer life is 600 gallon. Now I used 270 gallon during 7 months. Despite I used over 6 month, Can I use this filter until 600 gallon?

Asked by: Taejong
I have allowed my system to run beyond 6mo with out any problems. If filters were clogged water would have a bad taste on pressure would be refused dramatically. Hope this helps.
Answered by: Old pipefitter.
Date published: 2018-10-07

Is this item whole house?

Asked by: DER2018
No. Wholehouse Aquasana systems/options are available for your review as to which system might best fit your source of water supply to the house (public versus well) and the depth of filtration and volume of water use you anticipate supplying your whole house
Answered by: NDY0
Date published: 2018-10-04

Can the unit be installed to the water feed for a refrigerator in lieu of faucet on the sink?

Asked by: Mark C
We have heard of customers doing this in the past with our under counter units and it working for them. However, because the system has not been tested and certified for this type of installation, Aquasana cannot recommend it, nor can we assist in the installation, if that makes sense.
Answered by: Aquasana Service Team
Date published: 2018-10-03

I live in St. George Utah, and Arsenic in our drinking water is a problem. with the Aquasana aq 5300 what level of reduction can I expect?

Asked by: Anonymous
Arsenic removal requires special filtration through a membrane. Our Reverse Osmosis system is NSF certified to remove over 97% of arsenic in your drinking water, as well as 87 other contaminants. For more information, please visit:  https://www.aquasana.com/drinking-water-filter-systems/reverse-osmosis-claryum 
Answered by: Aquasana Service Team
Date published: 2018-10-03

How often do the filters need to be replaced?

Asked by: Walk
3-Stage filters should be replaced every 6 months or 600 gallons.
Answered by: Aquasana Service Team
Date published: 2018-10-03

Every time we turn on the faucet, is the water OK for consumption immediately or we have to let it run for a few seconds? Thanks.

Asked by: NewUser
When you initially install your filters, we recommend a 10-minute purge to flush any excess carbon and potassium. Other than that, it is not necessary. Mostly, it is just preference.
Answered by: Aquasana Service Team
Date published: 2018-10-02

I am interested in buying the under-sink filtration system but do not have a hole in the sink for a faucet. If I drill a hole for your faucet, what size and shape (circular, elliptical?) should it be? Thanks, JJ California.

Asked by: JJ California
The faucet may be mounted on the sink using an existing circular hole for a sprayer nozzle or soap dispenser, or by drilling a hole at least 1/2” in diameter. Be sure the location of the faucet allows the spout to extend slightly past the edge of the sink. Note: we recommend enlisting the services of an approved or certified professional if drilling is required.
Answered by: Aquasana Service Team
Date published: 2018-10-02

What are the dimensions of the unit Under sink MSRP

Asked by: Marg
The 3-stage Under Counter system measurements are as follows: Height: 9" Width: 12" Depth: 4.25"
Answered by: Aquasana Service Team
Date published: 2019-03-19

Does this filter remove PFAS?

Asked by: Kimberleelee
Yes. All of our drinking systems are NSF certified P475 for the reduction of PFA, PFOA, and PFOS (PFC).
Answered by: Aquasana Service Team
Date published: 2018-09-27

Does the water temperature come out room temperature or chilled?

Asked by: LeeAnn
Thank you for your inquiry. Aquasana systems have no effect on the temperature of your water.
Answered by: Aquasana Service Team
Date published: 2018-09-27

How much space is needed under the sink to install this?

Asked by: ting_squared
Thank you for your inquiry. The 3-stage system measures 9"H x 12"W x 4.25" D
Answered by: Aquasana Service Team
Date published: 2018-09-25

When it starts beeping, what does this mean?

Asked by: Chad1971
The beeping you are hearing is the indicator that it is time to change your filters. You should also replace the battery that is included with your replacemnt filters. Please refer to your Owner's manual for proper installation.
Answered by: Aquasana Service Team
Date published: 2018-09-25

Is there a way to test the alarm?  I don't think mine is working.  When I install the battery I don't hear the five beeps that should be expected.  I checked the voltage of the battery and it is reading 3.4 volts, so the battery isn't dead. 

Asked by: Lou D.
Thank you for your inquiry. The battery is a standard Lithium CR2450 3V battery available at your local store. You may also want to ensure the battery is inserted correctly. Try flipping it over. The writing on the battery should be facing the wall. Refer to the photo below. If you need further assistance, please call 866.662.6885 or e-mail support@aquasana.com
Answered by: Aquasana Service Team
Date published: 2018-10-14

I have a granite countertop without an extra hole. Is there any way to attach this to an existing faucet? Or, do you you have another suggestion? Does this filter out fluoride?

Asked by: Mezzo
Thank you for your inquory. The system coes with a small cold water faucet to be installed with the syste. You may use the existing extra hole you have. It is not deisgned to be used with the main faucet, as hot water should not be filtered through the system. It degrades the carbon at an accelerated rate. Tihe 3-stage system does not remove fluoride. However our Reverse Osmosis system does, and has a similar setup. You can review the RO system at: https://www.aquasana.com/drinking-water-filter-systems/reverse-osmosis-claryum I have also attached a photo of the setup so you can get an idea, just click on the photo below. If you have any questions, please e-mail sales@aquasana.com
Answered by: Aquasana Service Team
Date published: 2018-09-21

Hello, Is it safe for the water line to run behind the range so it can reach the ice maker within the refrigerator?

Asked by: mlouie
Thank you for your inquiry. While we believe it should be okay, We highly recommend you inquire with a licensed plumber. Let us know if you have any questions!
Answered by: Aquasana Service Team
Date published: 2018-09-18

How much of chlorine and fluorine does this remove?

Asked by: RJ....
Thank you for your interest in Aquasana. The 3-stage system is certified to remove more than 97% of chlorine in your drinking water. Flourine salt, or flouride, is only removed through our Reverse Osmosis system at: https://www.aquasana.com/drinking-water-filter-systems/reverse-osmosis-claryum
Answered by: Aquasana Service Team
Date published: 2018-09-18

Is this water Ionized as well??

Asked by: Zelly
Thank you for your interest in Aquasana. Our products do not ionize the water.
Answered by: Aquasana Service Team
Date published: 2018-09-18

Does this faucet allow for hot and cold water? Also, can I replace existing kitchen faucet?

Asked by: apand3
The faucet is designed for cold water only and hot water can degrade the carbon. Our faucets are specifically tested and approved by the NSF for use with our filtration systems. Because your faucet has not been tested and certified with our system, we cannot recommend it, nor can we assist in the installation. You may find the installation manual at http://cdn.aquasana.com/assets/AQ-5100-5200-5300_Install.pdf
Answered by: Aquasana Service Team
Date published: 2018-08-29

How will I know when to change the filters? Will the unit continue to function when new filters are needed?

Asked by: JimB
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.
Answered by: Aquasana Service Team
Date published: 2018-08-29

What size hole is required in countertop for AQ-5300 model spout? Thank you for your reply. Lynn

Asked by: Curious Lynn
We recommend a minmum of 0.5" and not to exceed 1"
Answered by: Aquasana Service Team
Date published: 2018-08-28
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