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
  • 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 Does what is claims to do! I've used AQUASANA filters for my drinking water and also for my two showers for a number of years. Fairly priced and shipping was timely. I like these filters because they not only filter out the normal things, but also filters out fluoride Can't be beat for the price.
Date published: 2017-11-10
Rated 5 out of 5 by from Very Easy I was very glad at how easy it was to swap out the filters and the kit included a new button battery. Nice touch, thanks.
Date published: 2017-11-06
Rated 5 out of 5 by from Peace of mind! Knowing that our drinking water is safe and delicious is more than worth the price of the Aqua Sana water filtration system!
Date published: 2017-10-26
Rated 5 out of 5 by from The cleanest water in town! Our Aquasana system and filters have been a life saver. The filtered water tastes amazing and the services provided for refills are affordable and extremely efficient. Love this company! Thank you!
Date published: 2017-10-26
Rated 5 out of 5 by from Great tasting water I have been using my Aquasana 3 stage filter system for about a year and a half now, and I have been extremely happy with it. We have tried 2 other systems, and are the most satisfied with this one. The water is clean and fresh tastiing, no chlorine and no other chemicals.
Date published: 2017-10-02
Rated 5 out of 5 by from Great Tasting Water! I have been using the 3 stage system for a few years now with water for life. The water is delicious. You can absolutely tell the difference. I am so happy I chose this filter, which keeps the healthy minerals in your water. The filters last well past their 6 month period. In fact, the change filter beep has only gone off once. That was my first 6 months right after installation in my newly built home.
Date published: 2017-10-01
Rated 5 out of 5 by from Fabulous Systrm I have used this system before and installed it in my son's home. He loves it!
Date published: 2017-10-01
Rated 5 out of 5 by from Very easy to install and get great tasting water! I've been using these for many years. They come every 6 months and I can tell my water tastes so much better. Super easy to install as well.
Date published: 2017-09-29
Rated 5 out of 5 by from Love it i love to know that my kids are drinking good water!
Date published: 2017-09-29
Rated 5 out of 5 by from Very Good water filters Have had this system for over 2 years. Easy to change filters. Great Customer Service. Use auto-ship filter service from Aquasana. Great service.
Date published: 2017-09-29
Rated 5 out of 5 by from 3-stage drinking water filter replacemen I love it. it is easy to install and the quality of water is good so far.
Date published: 2017-09-29
Rated 5 out of 5 by from Great support! One filter housing was broken for unknown reason. I tried to find the replacement on internet without success. Contacted aquasana tech support and got a prompt response and received the new part quickly. Thanks.
Date published: 2017-09-29
Rated 5 out of 5 by from Great Tasting Water We have had this water filtration system for two years. Small faucet next to the kitchen faucet very handy. Consistent delicious tasting water always.
Date published: 2017-09-28
Rated 5 out of 5 by from Flavor upgrade! I wasn't able to install the filter until five months after I received it but once it was in it was quite the drastic change and now water from the tap is actually good.
Date published: 2017-09-28
Rated 5 out of 5 by from 3 stage drinking water filter replacement I bought it a yr ago and still love the system would recommend to my friends.
Date published: 2017-09-28
Rated 5 out of 5 by from Easy to install and use daily! I bought this product after reading an advertisement in a magazine. This is an excellent product, and my family loves it. I would highly recommend it.
Date published: 2017-09-28
Rated 5 out of 5 by from Great product good customer service Bought it several years ago for my wife she loves it. And that’s the bonus
Date published: 2017-09-28
Rated 5 out of 5 by from Great solution It's been a year and the system works really well. The replacements come on time and are reasonably priced and easy to install. The water tastes like water should. Clear and clean.
Date published: 2017-09-28
Rated 5 out of 5 by from Pleased in every way! I have the water for life contract and have recently replaced my filters. They provide healthy, delicious, abundant fresh water with no chemical taste.
Date published: 2017-09-28
Rated 5 out of 5 by from Stands behind product. Love the ease of changing filters plus less waste.
Date published: 2017-09-28
Rated 5 out of 5 by from great tasting water Very happy with the quality of the water we have been drinking. No foul taste or odor.
Date published: 2017-09-28
Rated 5 out of 5 by from love this!! wow....great tasting water! my husband and i are in a rental and thankfully this sink filter fits! thank you Aquasana!
Date published: 2017-09-28
Rated 5 out of 5 by from best value for money Really nice product. Our water become overgrown constantly and this filter removes the odor and unpleasant taste. I still think it better solution rather than the osmosis. Unfortunately filter hardly last till next replacement, but it is water quality rather than the product itself.
Date published: 2017-09-25
Rated 5 out of 5 by from Excellent tasting water When I remodeled my kitchen three years ago, I installed an Aquasana filter system. I have been very happy with it, the water tastes great and getting a fresh supply automatically every six months means it always will.
Date published: 2017-09-23
Rated 5 out of 5 by from Great! Great product, good taste, very easy to install and durable
Date published: 2017-09-22
Rated 5 out of 5 by from great system I bought this system long time ago and we are all happy at home
Date published: 2017-09-22
Rated 5 out of 5 by from Upgrade I purchased the three stage years ago with automatic filter replacement. This equipment has served my family well. I would like Aqusana to upgrade my equipment to the new 3-stage max flow with the understanding that I will continue my filter replacement for life with the larger filters.
Date published: 2017-09-22
Rated 5 out of 5 by from Just got it installed but already quite pleased It was easy to install. We chose to have a qualified plumber to do it as we did not have te tools to pierce the sink to install the small faucet.
Date published: 2017-09-22
Rated 5 out of 5 by from Makes one have a sense of well being. Each time we used our system, during the last several years, we have been gratified to feel protected from harmful substances in our drinking water.
Date published: 2017-09-22
Rated 5 out of 5 by from Clean Water The difference in the quality and taste of our water is amazing. We have a lot of iron in our water, and the filters make an incredible difference in our water's quality. We would not want to be without these filters.
Date published: 2017-09-22
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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
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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