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 1492.
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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–6PM 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 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
Rated 5 out of 5 by from Good quality The filters are on the expensive side but they do the job the water taste grate
Date published: 2018-05-03
Rated 5 out of 5 by from Great taste, Have been using for several years, love it!! Will continue to do so. Would love to have whole house filter, but can't afford it now.
Date published: 2018-04-11
Rated 5 out of 5 by from Best Tasting Water Ever We moved into a brand new house from a condo where we had the on the counter machine. We had the triple filter installed under the sink in the new house. We just changed filters for the first time. Because of the design it turned out to be very easy and user friendly.
Date published: 2018-03-19
Rated 5 out of 5 by from Great customer service Quick delivery,clean water, taste great, easy to install
Date published: 2018-03-14
Rated 5 out of 5 by from Good Filtering We're pleased with this under the sink system. Although it takes several hours for the water get thru the new filters once changed, it works well afterward. Wish the counter top spicket had a larger hole where the water comes out. Its not much more than a heavy trickle, so filling pots or pet bowls takes some time. The smelly well water has no odor with this system and seems clean. Only takes minutes to change under the sink.
Date published: 2018-03-07
Rated 5 out of 5 by from We love our Aquasana water! Must say this water reminds me of the water I drank as a child living in the mountains of the western part of Canada. Fresh , clean......it is the best water I have drank in 45 years!
Date published: 2018-02-26
Rated 5 out of 5 by from Easy Installation This set was my second and we have gotten used to the fresh coffee on the morning.
Date published: 2018-02-19
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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 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

Changed filters in my 5300R today and the flow rate has decreased significantly. When I first turn it on, the flow is normal, but after a second, the rate decreases to a little more than a trickle. It sputters like there might be be air in the lines

Asked by: Joan
Make sure the valve is all the way on...all the way. Run it for 10 minutes straight to make sure there is no trapped air bubbles. Make sure replacement orfices are clear and free of packing. Every orfice should be clear in every line. Kinked line somewhere?
Answered by: Carl...lifelong plumber.
Date published: 2018-06-19

I replaced the filters on my AQ-5300R 12/2017. Customer service rep said I should be good for 1 year, as it is only me. The beep started 6/11/18, no way I went thru 600 gals in 6 months! Rep I spoke to said take out battery, & replace 12/2018. Yes or no?

Asked by: JanetM
Sure. Think it’s programmed for 6 months. I thought the filters and battery are to be replaced every 6 months. That’s what’s recommended. But if it’s only you, you’re probably good for 1 year.
Answered by: Bluest
Date published: 2018-06-19

The light on top of my 3-stage filter is blinking red. It's a new battery. What should I do?

Asked by: Nonnie
Hello! If you received a defective battery, you can just give us a call at 866.662.6885 and we will get a new one shipped out for you. Thank you, Aquasana
Answered by: Aquasana Customer Support
Date published: 2018-06-15

Does the AQ-5200R block flouride ?

Asked by: fooldawg
Thank you for your interest in Aquasana. The AQ-5300 and AQ-5200 systems are 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: 2018-06-02

Where do I find the battery of the AQ 5300?

Asked by: Kitkat
Each set of filters will come with a new battery. If you are trying to find the battery compartment of the system, run your hand along the top of the manifold (the part that the filter canisters screw into), and you will feel a tab. That little tab pops out and you can insert the new battery in the white piece. Thank you, Aquasana Customer Support
Answered by: Aquasana Customer Support
Date published: 2018-04-28

Changed filters 12/12/2017. Today we found the cartridge sump for the sediment pre-filter had failed and flooded the under-sink cabinet. Bottom of the sump had bulged out and had a X-shaped crack. What might have caused this? Can the sump be replaced?

Asked by: Walter
I'm sorry to hear that your system has sprung a leak! This can occur when your filters become clogged and pressure builds up within the system. We can certainly replace the damaged part for you. Just give us a call at 866.662.6885 and a member of our service team can discuss your warranty options. Thank you, Aquasana Customer Support
Answered by: Aquasana Customer Support
Date published: 2018-04-06

What is the difference between the AQ-5300 and AQ-5300R water filters?

Asked by: Kazuo
Aquasana's AQ-5300 and the AQ-5300+ contain the same benefits. However, the AQ-5300+ is designed with a 44% faster water flow, and an additional 200 gallons with each set of filters. Thank you, Aquasana Customer Support
Answered by: Aquasana Customer Support
Date published: 2018-04-05

I received my new filters in the mail so I know it has been 6 months, but it hasn't started beeping like the first 6 months did. Should I change the filters because it has been 6 months or should I wait for the beep?

Asked by: Loraine35
No don't wait for the system to alert you. Keep on the 6 month schedule. Do yourself a favor and after you install the new filters, on the canister closest to you write the date on a piece of masking tape and stick it on the canister.
Answered by: Bowie
Date published: 2018-03-26
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