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: 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 1571.
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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–6PM 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 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
Rated 5 out of 5 by from Owner/Individual Absolutely enjoy our new Aquasana filtration system. Water tastes very good so we have the confidence that water is free of most contaminates. Was easy to install (did not install brushed nickel tap). Staff at Aquasana very friendly and caring. Even called and offered a free gift !! Would recommend anyone to try Aquasana for clean refreshing water.
Date published: 2018-05-14
Rated 5 out of 5 by from great product Really like my new filter, water taste great and is very clear
Date published: 2018-05-09
Rated 5 out of 5 by from Impression of aquasana water filter We're definitely enjoying the quality of the water we're getting from our filter system, and it was a breeze to install. I'm a little disappointed with the dispenser, it leaks (bought 2 units and both have a drip) an upgrade would be nice. Overall very pleased with the taste and quality of the water.
Date published: 2018-05-09
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Learn More

Aquasana FAQs

  1. Do I have to pay for a plumber to install the system?

    Our under counter drinking water filter systems are very easy to install, and it only takes a few minutes to do; no plumber is necessary. If you have any questions or need assistance, our technical support representatives at 866-662-6885 can walk you through the installation process.

  2. How often do I have to replace the cartridges and how much do they cost?

    We recommend replacing the cartridges after six months or the specified gallon capacity to prevent the growth of bacteria in the system. The AQ-5100 Single Stage has a capacity of 200 gallons, the AQ-5200 Two-Stage has a capacity of 500 gallons, the AQ-5300 Three-Stage has a capacity of 600 gallons and the AQ-5300+ Three-Stage has a capacity of 800 gallons. Replacement filters cost $29.99 for the AQ-5100, $59.99 for the AQ-5200, $64.99 for the AQ-5300 or $79.99 for the AQ-5300+, but you can save 15%, get free shipping, and extend your product warranty by signing up for our no-contract auto-ship filter replacement program, Water for Life. The performance indicating device on the AQ-5200, AQ-5300 and AQ-5300+ systems will sound a beeping alarm and flash red when it is time to change your cartridges. The AQ-5300+ also contains Bluetooth connectivity so you can download our iPhone App and get alerts for when it is time to change your cartridges and even order new replacements straight from the App!

  3. Is this purified water?

    No, and actually, purified water is not as healthy as filtered water. Purified water undergoes reverse osmosis or distillation, which strip everything out of your water - not only the contaminants, but also the healthy, natural minerals. Our system uses selective filtration designed to reduce contaminants from the water and leave in the natural healthy minerals like calcium, potassium, and magnesium.

  4. How do I recycle the replacement filters?

    We have designed this system to minimize the environmental impact of our replacement elements, which are over 95% biodegradable carbon. Our company will recycle the filters for you, but we do not cover the shipping cost to return the filters back to us. In reality, the environmental impact of shipping the filters back to us outweighs the good of recycling. To recycle the drinking filters yourself, remove the ends of the filters, recycle the plastic parts (which are appropriately numbered) and put the carbon either in your compost pile or garden (carbon is good for plant life), or just throw it out (since the carbon degrades quickly, and is a positive component in a landfill).

  5. I'm a renter, so I can't drill or modify the plumbing. What should I do?

    To install an under counter system, you can remove the existing sprayer or soap dispenser on your sink and install our faucet in its place. This option will not damage or permanently modify your plumbing. When you move out, you can easily remove the system and reconnect your plumbing back to normal. If you do not have an existing hole in your sink from a sprayer or soap dispenser, we also have a countertop drinking water filter that conveniently screws on to most kitchen faucets.

  6. What is the size of the brass T-fitting for under counter and premium under counter unit?

    The most common size is 3/8" which originally comes with the system purchase. In rare cases some customers may need a 1/2" T-fitting which is sold separately and is available for purchase through technical support.

  7. What size hole do I need in my sink for the under counter and premium under counter systems?

    The faucet that is included with our systems requires a 1/2" hole.

  8. What does TDS mean?

    TDS is the acronym for Total Dissolved Solids, the amount of dissolved minerals and metals present in water. TDS meters tell you the concentration of dissolved minerals and metals, but are not an accurate measurement for contamination. Aquasana products reduce and remove harmful TDS like lead, but selectively retain or replace healthy dissolved solids like calcium, magnesium, and potassium.

  9. What is BPA? And why are people concerned about it?

    BPA stands for Bisphenol-A, a contaminant found in most plastics. BPA can adversely affect your health if consumed at high levels. Aquasana drinking systems do not contain BPA, and our filtration process reduces existing BPA.

  10. Does having hard water mean it is contaminated?

    Hard water is more of a nuisance than a health risk, and is not necessarily contaminated. Most water sources in the USA are considered hard. Hard water is generally safe to drink, after it has been properly treated.

  11. What is soft water, and is it safe to drink?

    Having soft water just means you have a lower concentration of dissolved minerals in the water (primarily calcium and magnesium). Soft water does not mean clean water. Your water can be soft and still contain contaminants.

  12. What is selective filtration, and how do Aquasana systems filter drinking water?

    Selective filtration is the process of sub-micron filtration, micron filtration, adsorption and ion exchange, all of which selectively reduces chemicals, heavy particulates and most dangerous heavy metals from the water while maintaining healthy minerals like calcium, magnesium and potassium.

  13. What is the difference between the single-stage, 2-stage and 3-stage under counter systems?

    All of our drinking water systems use the same Aquasana Claryum® filtration technology. The single-stage system lasts 6 months or 200 gallons before the cartridges need to be replaced. Our 2- Stage system has a higher capacity than the single-stage, giving you 6 months or 500 gallons of clean, filtered water. The 3-Stage system includes a 20 micron pre-filter before the two Aquasana Claryum® filters. This pre-filter increases the capacity of the system from 500 gallons to 600 gallons. In addition, it improves flow rate in high sediment areas. The 3-Stage Max Flow system adds even more capacity to 800 gallons, a 44% increase in flow rate at .72 gallons per minute and Bluetooth connectivity for filter tracking.

  14. I have an existing side faucet from a previous system. Can I use that with my new Aquasana water filter?

    We recommend that you use the faucet provided. We have extensively tested the system with the faucets included. The faucets are NSF Certified to have no lead content. In addition, they will not impart any unwanted chemicals into your water. If you choose to use another faucet, we recommend that you have a plumber install the system to ensure no leakage occurs. We also recommend that you install an NSF Certified faucet to ensure the health benefits of your new Aquasana water filter.

Learn More

User Q & A

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: 2018-11-09

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: 2018-11-06

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: 2018-11-06

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
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