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: Oil Rubbed Bronze
  • all-metal brushed nickel faucet
  • all-metal chrome faucet
  • oil rubbed bronze faucet
3-Stage Under Counter Water Filter - Oil Rubbed Bronze is rated 4.6 out of 5 by 1618.
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50% OFF 3-STAGE UNDER COUNTER SYSTEMS - limited time!
  • 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 CST
  • 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

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 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
Rated 5 out of 5 by from quality water on tap Aquasana is able to give quality product at value price. they offer the block carb. filter which really is need to stop chemicals. we are drinking a lot more water, since the system has been installed.
Date published: 2019-04-02
Rated 5 out of 5 by from It's perfect My plumber installed the filter, as I was also getting a new faucet. So I can't speak to the installation process, except that he didn't have any difficulty. It's in a nice, out of the way spot under the sink. The water flows beautifully, the water spout is beautiful, and most importantly, the water tastes fantastic.
Date published: 2019-03-19
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
Rated 5 out of 5 by from Excellent under sink water filter device. Installation was easy, and instructions were easy to follow. The best part was all needed installation adapters, screws, hoses included didn't need a trip to hardware store, that's the best. Works excellent and very convenient, allowed us to get rid of counter top filter appliance.
Date published: 2018-12-23
Rated 5 out of 5 by from Happy with our Aquasana We are really happy with our new Filter system. It was fairly easy to install as long as you don't forget to pull the little tabs when your done. We thought the filter was faulty for several days, until my husband figured it out, he had pulled one of them out and forgotten the other one. Once that was done, we saw noticeable results right away. Living in an area where water quality isn't great, I feel so much better knowing we are protected with clean safe water.
Date published: 2018-12-21
Rated 5 out of 5 by from Great water filter Installation was a breaze. Water tasting so much better. I've enjoyed our product very much.
Date published: 2018-12-17
Rated 5 out of 5 by from Great tasting water I’ve had 2 stage under counter system for 15 years and love it. The water tastes as good as Fiji bottled water and no plastic bottles sitting in landfills! Will upgrade to 3 stage soon since it wasn’t an option back in the day. You will not regret this purchase. My 15 year old dog drinks it too. Filters auto shipped every 6 months is convenient too.
Date published: 2018-12-07
Rated 5 out of 5 by from Aquasana Review Great product easy to intall..........,,,,,,,,,,,,,
Date published: 2018-11-12
Rated 5 out of 5 by from Great Little System We have treated city water and replaced our old R.O with a 3 stage filter almost 4 years ago. No complaints, no problems, no issues with leaks. We subscribe to the filter replacement program so we don't have to worry when the system beeps to be changed.
Date published: 2018-10-22
Rated 5 out of 5 by from Two months installed and my impression The water taste much better than straight out of the tap or buying it from a convenience store. It does not have the plastic taste that is common with some bottle water. This was easy to determine. I am assuming the water quality is better. I have not tested the water. The appearance of the water is same as buying water from a convenience store.
Date published: 2018-10-17
Rated 5 out of 5 by from Easy and delicious I am renting an apartment and was concerned with mounting the filter underneath my sink (ie: having to drill holes into the cabinet). I called customer service and they said it was fine to just set it down as it is; that it didn't have to be mounted. It has worked out great! I was also concerned with reviews stating it leaked. Mine does not, altho I found out that when installing the lines into the filtering unit you have to really push the lines in! I thought I had it in all the way into the filtering unit because it didn't seem to be able to go in any further but when I turned the water on it leaked. I looked at the directions again and saw that the line had to be pushed in nearly an inch (mine was less than half an inch). I marked the inch line on the tube and it took a bit of finessing and muscling but I was finally able to push it in the full inch. Overall (even with the tube issue) I would classify the installation as easy (especially since I did not have to drill holes in the cabinet and mount it). I have had the unit for almost three months now and I have been happy with it. The only thing I would like to see differently is an increase in the flow rate of the water; it is not bad but I would like to see it faster.
Date published: 2018-10-10
Rated 5 out of 5 by from Very good product for the price Installed in Sept. 2018. Installation was simple, in my opinion. Tap is a little short compared to our last one but the flow is very good compared to our last filter system. Water has no taste and looks crisp and clean. At this point we are very happy with the product.
Date published: 2018-10-10
Rated 5 out of 5 by from Aquasana Installed at our overseas apartment (Jordan ) to stop buying bottled water. Installation was very easy and water quality was excellent. Everyone liked the taste and it was as good as the bottled water. Used it for one month.
Date published: 2018-06-03
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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.

Learn More

User Q & A

Does the Claryum 3 stage under counter system remove fluoride?

Asked by: Kathy B
Hello Kathy, 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: 2020-01-06

How does the alarm work? Is it merely a 6 month timer or does it actually measure water throughput and alerts when 600 gallons of water have passed through filters?

Asked by: Randy1961
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: 2020-01-06

We have a granite countertop. What’s the best way I can install the faucet for the filter on it ? 

Asked by: Shubha
  Hello,   It appears you have several questions that would best be answered by a consultation with one of our experts over the phone.  Please call our sales department at 866-662-6885, options 1 and 1 to discuss a potential solution for your home.    Thank you,   Aquasana Support   
Answered by: Aquasana S
Date published: 2020-01-06

Does it remove nitrites ? And what about fluoride ?

Asked by: Roeyoga
Hello, Thank you for your question. 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 need further assistance contact us at 866-662-6885. Thank you, Aquasana Support
Answered by: Aquasana S
Date published: 2019-12-16

What other plumbing parts may be needed to install the under the counter filter system? And, do I hook it to the cold or hot water side?

Asked by: Doug4628
All parts needed were in the kit. Always use the cold water connection, never hot.
Answered by: Waterholic
Date published: 2020-01-18

does this come with the filters ? thanks

Asked by: cidny
Hello Cidny, Yes the system comes with a set of filters. If you need further assistance contact us at 866-662-6885. Thank you, Aquasana Support
Answered by: Aquasana S
Date published: 2019-12-04

Does the unit come with one set of filters?

Asked by: Dn water
Hello, Thank you for your question. Yes the system comes with a set of filters. If you have any further questions please contact us at 866-662-6885. Thank you, Aquasana Support
Answered by: Aquasana S
Date published: 2019-12-04

I would like to know the amount of under-counter space that is needed to install. We have a waste disposal that takes up some space there. So we want to see if it would fit.

Asked by: Marcia
Hello Marcia, Thank you for contacting us. I have provided the dimensions down below. Aq-5300 Specs: height 9" width 12" depth 4-1/4" If you need further assistance please contact us at 866-662-6885. Thank you, Aquasana Support
Answered by: Aquasana S
Date published: 2019-12-04
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