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 1500.
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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–7PM 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 Overall Experience of the Aquasana System The water filter system is under the sink; easy to replace; water tastes really good; replace it every 6 months or once the system warns you to replace it; we have had the system for over 3 years and we love it!
Date published: 2019-08-24
Rated 5 out of 5 by from Good clean water I've been using this system for a few years. Really like the tasty clean water
Date published: 2019-07-07
Rated 5 out of 5 by from greatly improves taste of our water Replacement filters are easy to install and improve water taste
Date published: 2019-06-06
Rated 5 out of 5 by from Easy to install, great product! Every six months I replace the filters easily. Tuck it back in to the corner under the sink. Let the water run to use it on my plants until it’s ready to drink. Water tastes great!
Date published: 2019-03-19
Rated 5 out of 5 by from aq5300 this is a great system this system works really well have had it for aprox 10 years on second one now. mounted it in basement and ran lines up to kitchen, is a lot easier to get at filters to replace them.only problem i have is aftrer 6 to 8 filter changes o rings will not seat and they leak. and they dont have replacement orings
Date published: 2019-03-14
Rated 5 out of 5 by from Filter works great and is easy to maintain. Installation of the new filters was easy. The only problem I had was reaching the filters as the person that installed it originally made it tough to get at. Very nice system.
Date published: 2019-01-10
Rated 5 out of 5 by from Aquasana drinking water filter replaced It’s easy to install and replacement, now I worry free because I sign up for water for life it’s auto to send my house every 6 months and discount $10 off too so I think it’s good for family to have one
Date published: 2019-01-05
Rated 5 out of 5 by from Very efficient. Very efficient and healthy, practical, and nice setup.
Date published: 2018-05-10
Rated 5 out of 5 by from Great tasting Water Love this water system. It doesn't take up allot of room under the sink and the water tastes wonderful. So glad I got it
Date published: 2018-05-08
Rated 5 out of 5 by from Very Pleased We have been very pleased with the Aquasana 3-stage drinking water system and filters. Have used it for your years on a regular basis. We had a plumber install system initially, but I change the filters easily. The taste is great. We sold our house where we had the system; and now we had one installed in the house that we are renting. I do highly recommend the system. Make sure it is installed properly so water flows correctly.
Date published: 2018-05-07
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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. 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.

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User Q & A

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

Is the red light on when the battery is in place so you know the system is working? It blinks when it needs changing? I see nothing currently..is that normal?

Asked by: charlie-m
Well, that's what mine does.
Answered by: Rich594
Date published: 2019-07-15

Is AQ-5300R the same as AQ5300

Asked by: Janis
Janis, The AQ-5300 is the actual 3-Stage Filtration System. The AQ-5300R are the replacement filters for the unit. If you have any other questions or concerns, our team member are available at 866-662-6885, Monday thru Friday from 8am-6pm CST, and weekends from 9am-5pm CST. -Aquasana Customer Support
Answered by: -ACS
Date published: 2019-06-14

Just replaced the filter. I heard the water sound in the filter when I turn on the water faucet. Is it normal? I never pay attention to it before. 

Asked by: SoSo
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 customer service department at 866-662-6885, to discuss a potential solution for your home. Thank you, Aquasana Support
Answered by: Aquasana S
Date published: 2019-05-15

Just replaced our filters and the water now taste bitter...it’s not bitter out of non-filtered faucets.

Asked by: Gary Bean
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 support department at 866-662-6885. Thank you, Aquasana Support
Answered by: Aquasana S
Date published: 2019-03-14

Where is the battery located? What kind of battery and should one ship with our replacement filters?

Asked by: Scrapper
The battery is located at the top of the system. Aquasana includes replacement batteries with every replacement filter order. Or you may purchase Lithium Cell CR 2450 3.5V battery.
Answered by: Aquasana Service Team
Date published: 2018-11-29

I have changed the filters and water doesn't run. I have checked all filters and water went through the first filter (black) only. The sumps are attached and locked in properly. What is wrong?

Asked by: Aquasana Problem
Hello, Thank you for your question. We would like this inquiry to be handled by a tech specialist. Please contact our team at 866.662.6885 or email support@aquasana.com for assistance. Thank you, Aquasana
Answered by: Aquasana Service Team
Date published: 2018-11-06

We have just replaced the filters and battery for the first time. The red light is staying on and the system is beeping. Does this mean the new battery is not good?

Asked by: Lynette
Lynette, Thank you for your question. Kindly keep in mind when the battery is inserted the system will blink (5) times and flash red. If the ticking does not stop, please contact our service team at 866.662.6885 for a replacement battery. Thank you, Aquasana
Answered by: Aquasana Service Team
Date published: 2019-05-16
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