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 1490.
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$11499 3-STAGE UNDER COUNTER SYSTEMS - limited time!
  • MSRP: 285.70
  • Sale: 114.99

Save 60% + free shipping with Water for Life $114.99

Questions? We can help

  • 866-662-6885
  • MON–FRI: 8AM–6PM CST
  • SAT–SUN: 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.

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 68 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 certified to NSF/ANSI Standards 42, 53, 401 + P473.

  • 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 Water never tasted so good. Working under a kitchen sink has never been easy but everything went very smoothly. Thanks for a great product.
Date published: 2017-11-20
Rated 1 out of 5 by from Great tasting water, flooded apartment I recently purchased filter system and installed as directed in user manual and user videos. I was satisfied with the taste of water. That is until filter water outlet tubing burst from the faucet nut causing flooding in my apartment, the apartment below me, and in my building lobby. Unlike the connection on the cold water line which uses brass fittings, the internal plastic fittings were completely insufficient. I am absolutely dissatisfied and requesting a refund. DO NOT BUY UNLESS YOU WANT SURPRISE WATER LEAKS!
Date published: 2017-11-18
Rated 5 out of 5 by from Our Family ❤️ the taste! We have used aquasna for a couple of weeks. We love it! We live In a city that has drinkable water most of the time( summer we have issues) but decided we were spending to much money on bottle water and the inconvenience of recycling all the bottles. This has been a great discussion. What we decided to do is buy a glass jar for cold water we keep in the fridge and we also keep 1 gallon jug for our pets filled and ready to go!
Date published: 2017-11-16
Rated 5 out of 5 by from Easy install We were looking hard for an affordable under counter filter system that complied with the NSF 42, 53 & 401 standards. This was the most reasonable and replaces our large Brita filter in the fridge. Never have to lug that over to the sink anymore! The water tastes great and we recommend the membership for new filters every 6 months!
Date published: 2017-11-15
Rated 5 out of 5 by from So glad I made the decision on this purchase! We are extremely pleased with this water system. Perfect addition to our kitchen makeover. Water quality is excellent! I would highly recommend this water filter!
Date published: 2017-11-11
Rated 5 out of 5 by from Excellent system Easy to install and great water quality. Very good value.
Date published: 2017-11-10
Rated 5 out of 5 by from Easy to install I had to replace my old system so I thought I would give this one a try. It was easy to install and water taste great! So far so good. I will be joining the auto ship for my filter replacement so I don’t have to think about it.
Date published: 2017-11-04
Rated 5 out of 5 by from Easy Installation I've had it two weeks. The installation was easy. The water is very soft which I like. High quality product.
Date published: 2017-11-01
Rated 5 out of 5 by from Outstanding water Have been using it for 1+ month. Great tasting water superior to any bottled water I have bought in the past. Easy installation.
Date published: 2017-10-31
Rated 5 out of 5 by from Great Selection I am last 2 weeks , very satisfy ,taste is great .
Date published: 2017-10-30
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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

How big is the hole on the counter to be drilled?  Is it difficult with quartz?

Asked by: Cory
I am disappointed that the company did not answer such an easy question. They state in their brochure the hole SB at least 1/2 inch, can be 1 inch. I would use 1 inch. You can buy a diamond drill bit kit re drilling thru quartz at Home Depot or Lowes. A good standard drill could be used. I suggest you go to google search re "drilling hole thru quartz" where you can find You Tube videos re drilling the hole. The decide if you want to do this or have a professional do it.
Answered by: Douglas1
Date published: 2017-11-16

Does it filter out iron?

Asked by: ktegner
I do not know for sure. Check with the Aquasana website and brochure of what the different systems can filter out of the incoming water.
Answered by: NDY0
Date published: 2017-11-06

When do I replace filters? I've had the system since March.

Asked by: Annamarti15
depending on how much water you use ,6 months to a year. when the flow slows a little bit, lower pressure
Answered by: biker bob
Date published: 2017-10-23

How much water needs to be flushed through new filters before drinking 

Asked by: Convol
Great question! We suggest letting the system run for at least 10 minutes, however some customers find that they need to let the water run a bit longer. Just taste the water after 10 minutes and if it has a bitter taste then let it continue to run. Thank you, Aquasana Customer Support
Answered by: Aquasana Customer Support
Date published: 2017-10-23

Hi, which is the shipping weight with the box?????

Asked by: Delta
Hello! This system weights about 7 pounds. Thank you, Aquasana Customer Support
Answered by: Aquasana Customer Support
Date published: 2017-10-12

Will this work for Well water. Does it filter out fluoride?

Asked by: Skdugg
Thank you for your interest in Aquasana. The AQ-5300 system is not NSF certified to reduce or remove fluoride. For 95.7% fluoride reduction, check out our under counter Reverse Osmosis system- http://www.aquasana.com/drinking-water-filter-systems/reverse-osmosis-claryum. Thank you, Aquasana Customer Support
Answered by: Aquasana Customer Support
Date published: 2017-10-11

I am doing new construction and will have a bar sink with an adjacent under counter ice maker.  Can your system filter water for both the sink and ice maker? Does it matter if the sink has both hot and cold water?

Asked by: Suze
Yes. Connect the input tube as illustrated to the cold water line to the sink and install the filtering system. Coonect the output tube to the filtering system out port. Then connect the output tube to a three way: 1) to the output tube, 2) to the dispenser faucet and 3) to the icemaker. The AQ-5300 flows at about 1/2 gal/min while the AQ-5300+ flows at about 3/4 gal/min. My AQ-5300 feeds 3 refrigerator freezer (water and icemakers). Great Water!
Answered by: NDY0
Date published: 2017-10-09

does the 3 stage filter reduce Hexavalent chromium

Asked by: kbobola6
Thank you for your interest in Aquasana! The AQ-5300 system is not certified for the reduction of chromium 6, you will need to utilize RO filtration to take care of this contaminant. For 97% chromium 6 reduction, check out our under counter Reverse Osmosis system- http://www.aquasana.com/drinking-water-filter-systems/reverse-osmosis-claryum. Please let me know if I can be of further assistance. Thank you, Aquasana Customer Support
Answered by: Aquasana Customer Support
Date published: 2017-09-29
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