Countertop/Under Counter Filter Replacement
AQ-4035 Water Filter Replacement

Replacement filters for the Aquasana Drinking Water Filter Systems

AQ-4000, AQ-4500, AQ-4501, AQ-4600 and AQ-4601 water filters

This replaces filters in the Countertop Filter (AQ-4000), and older Under Counter Systems (AQ-4500, AQ-4501, AQ-4600 and AQ-4601).

AQ-4035 Drinking Water Replacements is rated 4.5 out of 5 by 2143.
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  • MSRP: 59.99

Save 15% + free shipping with Water for Life $50.99

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

Also Replaces

AQ-4500, AQ-4501

AQ-4600, AQ-4601

Pure Performance

Convenience & Value

Fewer filter replacements. More clean, great-tasting water.

One Aquasana Claryum® filter gives you 11x the capacity of the leading gravity-based pitcher at only 11¢ per gallon.

How It Works

Superior Systems

Selective Claryum® Filtration

Reduces 68 contaminants while retaining beneficial minerals for optimal hydration.

Easy to install, replace & maintain

No permanent fixtures or installation required.

NSF Certified

Full system certified to NSF/ANSI Standards 42, 53 & 401.

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

  • 450 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 One of the best decisions I've made! I purchased the Aquasana counter top water filtration system a few years ago and the unit came with four glass bottles at the time. We have been extremely happy with the unit and are currently in the Water for Life program which automatically ships the replacement filters every six months and this company really stands behind their products. The taste and quality of the water is exceptional and my family is very happy. We rarely purchase bottled water now but only because we don't like to take the glass bottles outside. This unit is a good choice for your home water!
Date published: 2017-10-08
Rated 4 out of 5 by from reliable and excellent customer service We have had aquasana counter top model for somewhere between 8 and 11 years. The automatic refills come on schedule and we have learned how to change them easily. A fine product. The only improvement I wish for is an increase in the time it takes to fill a glass.
Date published: 2017-10-06
Rated 5 out of 5 by from Superconvenient We love the convenience of pure drinking water at our kitchen sink. What is even more convenient is not having to remember every six months to order a filter, they just send it! Thanks, Aquasana. (Not to mention the reduced price.:))
Date published: 2017-10-03
Rated 5 out of 5 by from Excellent product The water tastes great - better than bottled water. When I told you that the outgoing hose was brown, you sent me a pre-filter, and now the water tastes better than ever. Thank you.
Date published: 2017-10-03
Rated 5 out of 5 by from Easy to use I've used Aquasana for years and have no complaints! One housing did crack after the water still in the filter froze... but Aquasana sent me a replacement. Thanks!
Date published: 2017-10-02
Rated 5 out of 5 by from best water purchase ever !! I bought my countertop system about 10 years ago...got autoship for filters, never a problem. Got a cracked in casing, free replacement. .no hassles whatsoever.. Whenever I call to update card, info..etc..I am quickly routed to a REAL person. ..! AAAA + customer service...Great tasting water. Never want to be without it.
Date published: 2017-09-30
Rated 5 out of 5 by from Good! I've been using aquasuana for years. Always been satisfied with their products and how it handles my water. I will say I had a hard time taking the covers off of my counter housing unit by hand. But with a ratchet wrench they come off in a breeze now. Getting the tube in and out can be a little tricky but I don't mind.
Date published: 2017-09-30
Rated 4 out of 5 by from Nice Product I have been using these filters for many years and I’m very satisfied with the results. The cost is about the same as buying bottled water throughout the filter life, but is a lot more convenient. My one complaint is that the water flow on the system I have is annoyingly slow.
Date published: 2017-09-29
Rated 5 out of 5 by from Great service Been using it for a few years now and very happy with it, but the customer service is awesome
Date published: 2017-09-29
Rated 5 out of 5 by from Cost Filters are OK, but TOO EXPENSIVE. Make less expensive and I have 4 neighbors in our Condo who will buy it.
Date published: 2017-09-29
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Aquasana FAQs

  1. Do I have to pay for a plumber to install the system?

    Our countertop drinking water filter system is 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 450 gallons, whichever comes first. Replacement filters cost $59.99, 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.

  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?

    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 AQ-4035 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. Which filter system should I get?

    The countertop system is perfect for renters because it does not require a new hole in the counter. To install an under counter system, you can remove the existing sprayer or soap dispenser in your rental 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.

  6. What size adapters do you send with the countertop system (for the diverter hose)?

    13/16 and 15/16 male.

  7. What size is the chrome collar on the countertop system (on the diverter hose)?

    55/64-27 female.

  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. How do I know if an Aquasana system will be compatible with my faucet?

    The only faucets the AQ-4000 water filtration system will not be compatible with are the 2-in-1 faucets that have a detachable sprayer at the faucet opening. The AQ-4000 will fit most standard faucets and also comes with two adapters. If your faucet happens to be a non-standard size than the hose connection or adapters that come with unit, you can take your aerator to the plumbing section at your local hardware store and have it measured. After you know the size of your aerator, contact technical support with the size and we will see if we carry the right size adapter, and we will send it to you.

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User Q & A

Are the replacement filters (AQ-4035) available in Canada?

Asked by: Jenn
Hello! We are happy to ship all of our products to Canada. If you enroll in our Water For Life program, we will even cover all taxes and duties on automatic orders for replacement filters! - https://www.aquasana.com/water-for-life Thank you, Aquasana Customer Support
Answered by: Aquasana Customer Support
Date published: 2017-10-12

I've been using AQ4035 filters. I'm looking for a list of contaminants it filters, and what percentage; specifically--Bromodichloromethane, Chloroform, Chromium, Dichloroacetic acid, Trichloroacetic acid, Totaltrihalomethanes, Nitrate, Nitrite, Chlorate

Asked by: James115
Hi James, I hope you have been enjoying your system! A full list of contaminants as well as the percentage which is removed can be found here- http://cdn.aquasana.com/assets/AQ-4000-4600-4601_Performance_Data.pdf Let us know if we can be of further assistance. Thank you, Aquasana Customer Support
Answered by: Aquasana Customer Support
Date published: 2017-08-18

My AQ 4600 system leaks where the filter caps screw on. Is there parts available or an update? The rest of the system works perfectly!

Asked by: Peterf2
Hello, I'm sorry to hear that your system has sprung a leak! Please contact us at 866.662.6885 and a member of our service team will be happy to discuss your warranty and upgrade options. We look forward to hearing from you! Thank you, Aquasana Customer Support
Answered by: Aquasana Customer Support
Date published: 2017-07-30

Are the filters recyclable?

Asked by: Aubrie
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