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 2155.
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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 CST
  • SAT–SUN: 9AM–5PM CST

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 Great tasting water! My family has been using these water filters for a year and a half. We purchase a replacement every 3-6 months depending ion how quickly they become filled with particles. Without these filters, our small municipal water source delivers water that is not always clear. Although the tests show that it is safe, the water tastes bad without this filter. I am very pleased with this product!
Date published: 2017-12-13
Rated 5 out of 5 by from Great product and great service I've had my filtration system for years but stopped using it when I moved to a new house with a kitchen faucet that was incompatible with the system. In the meantime, I was buying spring water from the store but it was getting expensive. So I contacted Aquasana to see about adapters to use so that I could use the system again. They were kind enough to send out a set of adapters-I just paid for shipping and handling. Great service and great products!
Date published: 2017-11-29
Rated 4 out of 5 by from Undercounter install, & wonderful performing tap Using water for life is essential, especially if it is filtered because you really don't know what is in the water. I am comfortable in knowing that Aquasana AQ4035 filters my water & has the capacity to eliminate harmful chemicals in settling in my water.
Date published: 2017-11-22
Rated 5 out of 5 by from Great portable product with great pricing I've been using Aquasana counter top filters for several years now. I am very happy with them. I will be purchasing either a whole house filter or at least a shower filter in the future
Date published: 2017-11-21
Rated 5 out of 5 by from Easy to change Gets rid of many contaminants. The improved taste is a great aspect.
Date published: 2017-11-20
Rated 5 out of 5 by from Aquasana water filters I bought Water For Life Aquasana water filter system over ten years ago, and have never been disappointed with the filters.
Date published: 2017-11-19
Rated 3 out of 5 by from It alternates between working and not working Negative: Sometimes the filters do not work and will create a strong pressure inside the water filtration system where it can easily damage it. Positive: It is a decently priced water purification system when it does function as advertised. It met my requirements for a filtration system that will not completely eliminate all minerals like a RO will do.
Date published: 2017-11-16
Rated 5 out of 5 by from Aquasana AQ4035 Drinking water replacements Easy to install. Great tasting water. Great service.
Date published: 2017-11-13
Rated 5 out of 5 by from Quick and easy The filter replacements are easy to replace and only take a bit of time. The water tastes great with no carbon taste.
Date published: 2017-11-09
Rated 5 out of 5 by from Excellent Products Excellent products, which we have been using for years. More than 15 years, at least. Can't recall exactly when we got rid of our other pitcher/container filters and bottled waters. This filter removes a higher percentage of water contaminants. Best investment you can make while eliminating the need to cart heavy bottled water containers from the supermarket.
Date published: 2017-10-22
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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

Hello, Looking for replacements filters for AQ 4000W Are the AQ 4035 the same filter?

Asked by: Dennis T

The filters says to use AQ-4025 replacement filters. Is there a replacement for this filter

Asked by: Dan L
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