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 1531.
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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–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 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 Love my new Filter system. Bought this about a month ago. Easy to install. Love being able to give my cat and dog filtered water and have good water to cook with and wash fruits and vegetables.
Date published: 2018-02-20
Rated 5 out of 5 by from Excellent! Been an aquasana customer for years and never been disappointed. Love their filters.
Date published: 2018-02-20
Rated 4 out of 5 by from good don't have to buy bottles 123654789698745632156955
Date published: 2018-02-20
Rated 5 out of 5 by from Best Tasteing Water After a friend’s recommendation and a lot of online research, I purchased and installed the under sink 3-stage filter system (about two months ago). Filtering out the most contaminates was my top priority, followed by price. This system easily met those criteria. The surprise was how good the water tastes; it’s very clean tasteing and actually tastes sweet. I drink more water now (and stopped drinking the filtered water at work and began taking two bottles of my own water to the office every day).
Date published: 2018-02-18
Rated 5 out of 5 by from Great filteration system Been using aquasana for years. Just got this new undersink, easy install.
Date published: 2018-02-16
Rated 5 out of 5 by from Love it I had an on the counter water filter that I was happy with, but when I replaced my kitchen faucet I decided to go with the under the counter filter and I love it. It looks lovely and is so much easier to use than my older counter top filter. Don't know why I didn't switch a long time ago.
Date published: 2018-02-16
Rated 4 out of 5 by from Great filter Great filter. Had to drill a half inch hole in the sink for the filter faucet to to fit. Takes some effort to tighten the filter faucet down so it won’t loosen up during usage.
Date published: 2018-02-16
Rated 5 out of 5 by from 3-STAGE I upgraded from counter top to the 3-stage under mount with facet work great much nicer really like this one.
Date published: 2018-02-16
Rated 5 out of 5 by from Better than expected I wanted a pre-filter system for my $5000 Alkaline filter machine because the filter was so expensive. I never believed this would end up actually REPLACING IT. This system is easy to install. The faucet part was the hardest because you have to actually fit under the sink but the rest was eazy. BE SURE YOU INSERT THE HOSES ALL THE WAY IN!!!! LOL or you WILL get wet but that's easy. The water taste is great. The chlorine count is virtually zero. The alkaline is around ph8. Neutral is 7.5. The only thing I don't like is that the faucet is too low for a pitcher to fit under while on the counter top and with our size family the sink is often full. Customer service is pleasant and knowledgeable as well. I'm extremely pleased.
Date published: 2018-02-16
Rated 5 out of 5 by from Great product I have been using aquasana products for 30 plus years I just periodically upgrade to the newer technology ... I just wish I had gone for the faster water flow on this purchase
Date published: 2018-02-15
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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

my faucet is leaking how I replace the stem?

Asked by: pino
I'm sorry to hear that your faucet is leaking! Please contact our support team at 866.662.6885 and we will be happy to assist in troubleshooting. If necessary, we can also discuss your warranty options. Thank you, Aquasana
Answered by: Aquasana Customer Support
Date published: 2018-01-31

I have to drill a hole in my granite counter top for the faucet. What diameter hole is required?

Asked by: Rufus
Don't know the exact size but I removed my soap dispenser and just used the hole drilled for that.  Soap dispenser was a pain to fill.  Yes you will need a hole unless you want to do what I did.  I would have a professional drill the hole.
Answered by: Katy
Date published: 2018-01-28

Order Number: 784914 for an under sink filter system. Is it possible to change the dispenser faucet to brushed nickel? As far as I know the item has not been shipped yet. Thank you

Asked by: Skillet
Yes any dispenser faucet will work regardless of the finish of the filtration unit. Hope this helps.
Answered by: Old pipefitter.
Date published: 2018-01-25

what are the dimensions of the faucet.

Asked by: RH19
I suggest you contact Aquasana Customer service. This will give you a taste of the sort of customer support you can expect from them should you decide to buy and have troubles with the installation as I did.
Answered by: JohnFromMN
Date published: 2018-01-18

How is the water flow

Asked by: tj caveman
Hi Tj, this system is rated for .5 Gallons per Minute. Thank you, Aquasana
Answered by: Aquasana Customer Support
Date published: 2018-01-17

Wondering if this version filters out fluoride also or just the reverse osmosis model?

Asked by: Ys144
The only way to remove fluoride from your drinking water is through Reverse Osmosis. Our OptimH20 removes 95% of fluoride plus 87 additional contaminants including lead, mercury, asbestos, pharmaceuticals, pesticides, herbicides, and more. To comment on the customer answer below, our RO system also includes what we call a remineralizer. It puts the good minerals like calcium, potassium, and magnesium back into your water to ensure you're drinking the healthiest water possible. Feel free to check out our RO system here: https://www.aquasana.com/drinking-water-filter-systems/reverse-osmosis-claryum
Answered by: Aquasana Customer Support
Date published: 2018-02-17

Does the spicket on the faucet rotate 360 degrees?

Asked by: Thad
Yes it can rotate 360 degrees. However, my spicket can not turn all the way because of the high countertop. 
Answered by: Cindylou
Date published: 2018-01-03

Can you use this system for hot and cold water output or a combination of both? I'm trying to find a system that will allow proper temp to wash my hair. Thank you.

Asked by: onebold1
You might be able to do this, but it wouldn't be straightforward. You would need to install a tempering valve (available from a plumbing supply company; cost about $80) and attach the Aquasana to the output of the tempering valve. You might also want to add a separate cold-water valve to the tempering valve output if you wanted to cool the water somewhat.
Answered by: pc44062
Date published: 2018-01-18
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