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 gallons of filter life capacity! 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 4.5 out of 5 by 1675.
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  • MSRP: 285.70

Save 20% + free shipping with Water for Life $228.56

Questions? We can help

  • 866-662-6885
  • SAT: 9AM–5PM CST

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

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 space saver. Great space saver and it will filter the water also....
Date published: 2020-10-24
Rated 5 out of 5 by from Can drink our water again So nice to have drinking water again. Our water was terrible had to buy bottled water. We had so much calcium in our water we couldn’t use the ice or drink the water. After installing the filters its like night and day, great drinking water and crystal clear ice. No more bottled water
Date published: 2020-10-15
Rated 5 out of 5 by from Love it Love it....love it.... Live in Florida everyone should have this on their sink. Thank you
Date published: 2020-10-15
Rated 5 out of 5 by from My overall impression of your product It was very easy to install! The water taste great! We now have the peace of mind we are drinking clean water! And we don't have to buy bottled water anymore!
Date published: 2020-10-15
Rated 5 out of 5 by from Easy to use and install. Tastes great! The installation process was simple! The water tastes great! The spout makes is convenient to use! Really glad to got it! We have not experienced the "refill process" yet. I am hoping that goes as smoothly.
Date published: 2020-10-08
Rated 5 out of 5 by from Very good quality filtered water We are enjoying our filtered water very much and use filtered water every day. My husband was able to install the system on a Sunday afternoon. We are definitely glad we got this system. So glad to not have to buy bottled water anymore.
Date published: 2020-10-04
Rated 5 out of 5 by from Great filter system. We are very pleased with our Aquasana filter system. It was easy to install and looks great in the kitchen. The water flow is great. Our water taste much better and we feel safer knowing our water is filter through the Aquasana system. We also like the fact that the filter lets us know when it needs changed.
Date published: 2020-10-04
Rated 5 out of 5 by from Great safe water system Get a couple of tools ready, open the package and in about 20 minutes, presto you're drinking clean, safe, delicious water. Over the years I've always installed filtration systems in our homes and even our 5th wheel RV. This system is hands down the easiest to install and there is no more taste in your water. Water should be crisp and refreshing not flavored. Stop your search. By this inexpensive, easy to install filtration system now. You'll be glad you did. OH! And the best part, save money by getting on "auto-ship" and go worry free from now on.
Date published: 2020-10-04
Rated 5 out of 5 by from Very Impressed I did not buy my Aquasana 3-Stage Under Counter Water Filter new. I bought it from a friend who used it in her coffee shop to filter the water for her machines. She wanted a larger one so I bought this one. Before installing it I replaced the filters. If you do not believe a water filter is worth it you will once you replace the filters and see what it removes. I was very impressed with how easy this was to install and equally as impressed with how much better the water tastes. I'm a customer for life now. I'm so impressed with this product that I plan on installing a whole house unit next year.
Date published: 2020-09-26
Rated 5 out of 5 by from Beyond thrilled Beyond thrilled with this system. The first time you clean the filters you'll see HOW MUCH DIRT they catch that's visible. Then you wonder about the invisible stuff. Every time I see a Brita in someone's fridge, I do a soliloquy about Aquasana. Get this, you will love it.
Date published: 2020-09-21
Rated 5 out of 5 by from Very Satisfied I had been paying for a popular water delivery service. I became totally frustrated with their incompetence, which included missed deliveries. I then remembered about the under the sink filter alternative. I checked for reviews. Aquasana came up with a very good rating. After receiving and installing the under sink three filter system, I have to agree. This Aquasana filter system is everything that I had hoped it would be. The product appears to be very well made. The instructions were very clear, and I was able to install it with no problems at all. The water tastes great. I only wish I had made the switch sooner.
Date published: 2020-09-10
Rated 5 out of 5 by from Such good tasting water! Aquasana provides excellent tasting water. It is so good to turn on the faucet and use clean fresh water for all our cooking and for drinking. It wins in a taste test with Britta and Bottled water. We are so happy to have it! Hurray!
Date published: 2020-09-06
Rated 5 out of 5 by from Clean Water We are enjoying clean, delicious Aquasana water. Thank you!
Date published: 2020-08-23
Rated 5 out of 5 by from Clear and tasty water! I had my super install and he said that it was easy work. He liked it so much that he is planning to purchase one! I think NYC water is fantastic but this filter adds an extra boost of clean. I love it!
Date published: 2020-06-08
Rated 5 out of 5 by from Our first water filter system My husband was able to install it on a weekend afternoon. It definitely does a good job. We have a water distiller so we put filtered water versus non filtered water in it and there was a big difference. The Aquasana filtered water left no residue in the distiller.
Date published: 2020-05-26
Rated 5 out of 5 by from Aquasana 3 stage undercounter filter We love the filteration system. Was easy and quick to install. The water quality is fantastic. We love the peace of mind of having this system in place to ensure safe and delicious water to drink with and cook with
Date published: 2020-05-05
Rated 5 out of 5 by from Love it! The install instructions were very detailed and I was able to do it all myself.
Date published: 2020-05-05
Rated 5 out of 5 by from Great tasting water Not as easy to install as your video, because there are plumbing pipes in the way, garbage disposer, sink, etc. However, the parts went together fairly well. One of the filter modules leaked at first and I had to call customer service to resolve the leak, but works fine now. I do wish the on/off handle on your faucet was a bit higher up though. All things considered I'm glad to have bought it.
Date published: 2020-04-22
Rated 5 out of 5 by from excellent product The product was easy to install and the brushed nickel faucet looks elegant. I'm glad for the peace of mind knowing my water for drinking and cooking is being filtered. It was an added bonus for me that the shape of the faucet makes it easy to fill a pot.
Date published: 2020-04-09
Rated 5 out of 5 by from It is verything it is advertised to be! I have had nothing but great experience with your company!
Date published: 2020-04-04
Rated 5 out of 5 by from very satisfied the product & service. Happy with product, free from contaminants, easy to install, economical and good customer service.
Date published: 2020-03-23
Rated 5 out of 5 by from Very Good Product We had a leak with the first filter unit and had to order another one. They sent the whole unit plus an extra top. These pieces were delivered more quickly than the original order. Once the replacement was in place we were good to go. Water tastes great, and, also very impressed with the water flow as we thought the water would just dribble out. Great system.
Date published: 2020-03-18
Rated 5 out of 5 by from Overall impression of aqua sans product Cool, glad i got it. Yet to see how the “Aquasana For Life” program works, but I’m sure it will be ok.
Date published: 2020-02-21
Rated 5 out of 5 by from Second impressions are better So far it is performing a whole lot better than the reverse osmosis system used previously. No wasting wasting water. The water flavor is really good- very simple to use, although there was a small leak on the first filer. After getting help from customer service the leak continued, but it was solved by exchanging last canister with first one. Works GREAT!!!! So far.... LOVE IT. Just fix the leak problem.
Date published: 2020-02-09
Rated 5 out of 5 by from Easy to install. Purist water as expected It tastes like water. It gives me ease of worry in eliminating chemicals or harmful contents in the quality of my water.
Date published: 2020-01-18
Rated 5 out of 5 by from Love our new water filter My husband installed this easily. There is a big difference in the water taste. We bought this to filter PFAS which is a very dangerous contaminant.
Date published: 2020-01-11
Rated 5 out of 5 by from Great Product - Great Price I was always complaining that "I hate water!" until this filter was installed. It has completely changed my mind about drinking water. I love drinking water now and my body is responding positively to the increased fluids. The product was relatively easy to install, is environmentally conscious and looks great!
Date published: 2019-12-30
Rated 5 out of 5 by from Awesome product! Love our new water filtration system! Great taste! We are actually drinking more water now! Super easy to install!
Date published: 2019-12-15
Rated 5 out of 5 by from Excellent When we had our kitchen of forty years remodeled, our contractor suggested that we add a bar sink. It was on this sink that we added the Aquasana three stage under counter water filter. Since we have had it installed we not only use it for drinking water but for our coffee maker and when preparing tea. As time goes on I know we will use it even more.
Date published: 2019-11-10
Rated 5 out of 5 by from Easy install great tasting water Easy install great tasting water, gives us peace of mind, and reduces out foot print!
Date published: 2019-10-18
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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

Can the faucet head turn from side to side or complete 360 to move it out of the way when doing dishes and things?

Asked by: Meredith
We move ours gently side to side. We are unable to turn it 360 so I don’t know if you can. My mother had one and when she moves it quickly back and forth it tends to loosen.
Answered by: Helpful Hanna
Date published: 2021-01-11

What micron are the filters

Asked by: Donna D
Hello, Thank you for reaching out to us. 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 the flow rate in high sediment areas. If you have any further questions feel free to contact us at 866-662-6885. Thank you, Aquasana Customer Support
Answered by: Aquasana S
Date published: 2021-01-08

We needed a plumber to install the 3 stage under the sink model due to connecting to the fridge . Also it did not fit well under our sink do to pipes  and disposal. Difficult to reach now. Any solutions? Future smaller filters?

Asked by: Lauralee
MrEPH , thank you. We did try to install it on the opposite side of the disposal but there was not enough room due to the size of the filters . It had to be placed on the back panel underneath the sink which makes it extremely difficult to reach and change.  I was hoping since I’m not the only one with a complaint about the inability to fit , that they would come up with a more sleek fitting unit that is more universal for most “all” sinks. Ours isn’t extremely small underneath, and our home is only about 14 yrs old.. the filter cylinders with 3 in a row are just too deep and wide. It’s doable, but especially after needing a plumber to properly cut the lines to attach to the fridge, ( the warranty originally stated that if modified for this purpose a plumber should be used to keep the warranty intact) after that cost, the last thing we want is a lesser functioning counter unit, like the company answered on my question 
Answered by: Laural
Date published: 2020-12-11

I have a buzzing noise coming from the system under the sink. It has three filters red, black and yellow. How do I make noise stop?

Asked by: Ms Mee
I know it has an alarm for filter replacement. I have never had mine go into alarm but you might pull the battery out of the upper filter housing and see if it stops. If so then it wants you to change the filters.
Answered by: Steve R
Date published: 2020-12-05

Dear Aquasana support, Is it necessary  to shut off water supply for filter replacement? This is for 5300 system.  Thank you in advance. 

Asked by: Artak
Hello, Thank you for your question. Yes. It is absolutely necessary to shut off the cold water valve under the kitchen sink before replacing the filters. This will release the pressure from the system by turning on the filtration system faucet. Once there is no longer any water coming from the filtration system faucet, you will be ready to change the filters If you have any other questions or concerns, you may also contact us directly at 866-662-6885, Monday thru Friday from 8 am-6 pm CST, and weekends from 9 am-5 pm CST. -Aquasana
Answered by: -ACS
Date published: 2020-12-03

If I am on a well, and I use a water softener that I put salt in, will this thing still help my water if I am on a well

Asked by: Colls
Yes, the water will taste better.
Answered by: Old pipefitter.
Date published: 2020-11-27

Is it possible to buy just the cartridge sump, mine is cracked in the bottom. I do not see anywhere on the page where can I get the sump only.

Asked by: Anibal
Hello, Yes, We can help further assist on replacing the replacement part needed. Kindly email us directly at support@aquasana.com or contact us directly at 866-662-6885, Monday thru Friday from 8 am-5 pm CST. Thank you, Aquasana Customer Support
Answered by: Aquasana S
Date published: 2020-11-24

I just installed the three stage unit using the included faucet. The flow rate is too slow. Is there anyway to increase the flow rate?

Asked by: Sightseerrv
Hello, Thank you for contacting us. The issue could be the sump is not fully turned into the correct position. Step 1 Turn off the main water supply underneath the sink Step 2 remove sump from the manifold and reconnect Step 3 Ensure that the connection points align correctly and turn the sump from left to right until it stops Step 4 If the sump is not locked in the correct position, it can slow the flow of your system. Step 5 once re-threaded and re-attached, test by turning the water supply on If this does not help please contact us at 866-662-6885 and we will be happy to help further assist. Thank you, Aquasana Customer Support
Answered by: Aquasana S
Date published: 2020-11-19
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