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 1488.
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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 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 , 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
Rated 5 out of 5 by from Excellent product After purchasing aquasana had a plumber come, none of the parts fit our system, but the plumber went on how these system don't work that well. Well the results were just as good as the expenesive units. Very pleased with the water filter.
Date published: 2018-02-14
Rated 5 out of 5 by from clean and clear The best water filtering system available. I did the research on several. Regular sink water had a strong lead, clorine , iodine taste. The Aquasana triple filter took away all the bad flavors. Especially noticed how much better the tea and coffee tasted. Great product, Highly recommend it.
Date published: 2018-02-09
Rated 5 out of 5 by from Works well Works well for tea water, kids won't drink any tap water at all anymore.
Date published: 2018-02-09
Rated 5 out of 5 by from easy to install & water tastes great system is easy, very easy to install. water smells good ( no bad odors) and tastes just as good as spring water.
Date published: 2018-02-09
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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 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

After installing the my latest set of replacement filters, the flow is slow & creates a high pitched whining noise when turned off. I've never had this happen before. Is it possible that one of the filters has a problem?

Asked by: Beast
I do not know, but wonder if the shut off valve in one of the filters may be partially closed or almost closed. The noise you hear might happen if filter is not clicked all the way on, therefore not opening the valve very much causing a vibration from water trying to get through the valve. This is only my logic and some guessing. good luck.
Answered by: Bobby3
Date published: 2018-03-21

I replaced my filters in June of 2017 and it hasn't beeped yet to let me know to replace them again. Do I wait for the beep? I thought it was every 6 months? I checked the battery and when I take it out and put it back it in beeps 5 times like it should.

Asked by: scpugh
The beeper is set to go off when the filters are full. Depending on how much water you put through your filter, and how clean the water going into the filter is, you may not need to change every 6 months. My filters lasted longer than six months until I started using filtered water for my coffee. The added throughput had the beeper going off right at six months. Im signed up for the water for life membership and my new filters came right after the filter started beeping.
Answered by: paddy1420
Date published: 2018-03-05

What is the height & width of the AQ-5300+ Aquasana unit?

Asked by: hobnob
with the filters put in height is 8 3/4 and width is 12 inches
Answered by: josh1211
Date published: 2018-02-25

My system has never beeped.  I have replaced them a few times.... Why hasn't the system beeped?  Is the incoming water good enough to not signal a replacement is needed?  I do not want to spend money to replace the filters if it is not needed. 

Asked by: Dubious
Has the battery been replaced? Do you replace it with each filter change? It could be a dead battery as the cause that your system has not beeped.
Answered by: Addicted to Golf
Date published: 2018-02-13

Are the filters for the Model Number AQ-5300; and Model Number AQ-5300+ interchangeable?

Asked by: RobN
No, the 5300 and the 5300+ have two different filter sizes. You will want to make sure you purchase replacements accordingly. Please let us know if you have any other questions!
Answered by: Aquasana Customer Support
Date published: 2018-02-28
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