Filter Replacement
3-Stage Under Counter Water Filter

Replacement filters for the Aquasana 3-Stage Drinking Water System, Model Number AQ-5300.

5300 water filter

This filter set replaces the filters in the AQ-5300 3-Stage drinking water filtration system.

3-Stage Drinking Water Filter Replacement is rated 4.6 out of 5 by 1510.
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  • MSRP: 64.99

Save 15% + free shipping with Water for Life $55.24

Questions? We can help

  • 866-662-6885
  • MON–FRI: 8AM–8PM CDT
  • SAT: 9AM–5PM CDT

Pure Performance

Claryum® Technology

Activated Carbon Reduces organic chemicals like 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 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!

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 a complete list of contaminants reduced see our Performance Data Sheet.

  • 600 gallons
  • 6 month filter life
  • 1 year warranty
  • 90 day guarantee

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Read the Reviews

Rated 5 out of 5 by from 3 stage under counter filter We like the fact that this filter system eliminates so much more contaminates then the filters available in the store, we are on well water and we like to know that our family is protected.
Date published: 2020-09-21
Rated 5 out of 5 by from Good find I love the new filters. Didn't realize we had to use all 3 for our system, but it was easy to install. Our water tastes and looks better. Will definitely buy again.
Date published: 2020-09-05
Rated 5 out of 5 by from Good filters easy to replace. Has made a big difference in the condition of our coffee maker and keurig.
Date published: 2020-08-28
Rated 5 out of 5 by from WORKS GOOD WORKS BETTER THAN PAST FILTER SYSTEMS WE HAVE USED
Date published: 2020-05-02
Rated 5 out of 5 by from Great tasting and very clear water You can definitely taste the difference when using these filters. I’ve been using this system since 2016 without any issues. Water is crystal clear and very tasty. Recommend it to anyone looking for a good reliable filter.
Date published: 2020-04-21
Rated 5 out of 5 by from Easy We have been using the Aquasana system and filters for about 2 years now and very pleased. Filters are easy to install and like that there's a low alarm to signal when it's time to replace with fresh filters.
Date published: 2020-03-27
Rated 5 out of 5 by from High quality household filter system. The filters are high quality and long lasting. Very easy to install and remove when replacement is necessary. My water is crystal clear and tastes great.
Date published: 2020-03-09
Rated 5 out of 5 by from Filters install easily in unit. The filters go in easily. Just remember to turn water feed off before installing your new filters. Tighten filters only hand tight and remembering put in new battery.
Date published: 2019-12-20
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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

I replaced the filters and seem to have trapped air in the system, even after letting the water run for 20 minutes. I had this happen once before as well and the water flow is very slow out of faucet. Any ideas how to fix this?

Asked by: Slow Flow
Shut down the filter at the faucet let it sit for a while, then turn it on fully. Let it run for a while then repeat until air is out of the line.
Answered by: Louie
Date published: 2020-05-21

Does the $65.00 include all three filters and is that for 6 months usage, based on normal household use??

Asked by: Sheshe
yes
Answered by: arfrogs22
Date published: 2020-04-28

Is this replacement filter system compatible with Aqualiv 3-stage FS300 filtration system?

Asked by: Rose Marie
Hello Rose, Thank you for contacting us. I am unable to give the answer as we are not familiar with the Aqualiv 3-stage Fs300 filtration system. Feel free to contact us at 866-662-6885 to help further assist. Thank you, Aquasana Support
Answered by: Aquasana S
Date published: 2020-04-22

When should filters be replaced? Does water stop running when the filters are full?

Asked by: Bobster
we are on the every 6 months plan, depending on your usage and water quality that seems to work. if the filter is on to long it does slow down the water but not stop. if you see a change in flow change it.
Answered by: ALFski61
Date published: 2020-04-19

I don't see a 60% off on these filters that you are advertising

Asked by: DKDaniels
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: 2019-12-04

in need of a filter cover for the AQ5300. the second filters cover seem to have cracked. any help with actual description or part number so I can order. thanks

Asked by: quat
I would just take a picture and email it to Aquasana, I have the whole house system, it works as it should but it does slow the flow. 
Answered by: Scott in Denver
Date published: 2020-05-11

How the heck do I order replacement filters on your site without being signed up for auto replacement. This is so frustrating!

Asked by: Amber1
Hello Amber, Thank you for your question. On our website their are two options, add to cart in the color orange and the second option is add to cart with water for life in red. Please select the orange option to not be added to water for life. Thank you, -Aquasana Support
Answered by: Aquasana S
Date published: 2019-11-07

How to change this filter. I’m not able to do it 

Asked by: Upma
Generally, I turn off the cold water supply under the sink, unscrew the tops of the various filter casings, remove the used filter cartridge from each, and replace with the new, according to the color coding, replace the tops, screw to tighten, and turn the water back on. I used to have some issues loosening the tops but this has got much better since they changed the tops, making them easy to loosen by hand. There are directions which come in the package with the replacement filters. If these are difficult to follow, you can also call customer service- I have had someone walk me through it the first time. It is easier than it might seem once you have tried it.
Answered by: clean source seeker
Date published: 2019-09-29
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