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Aquasana AQ-4000 Countertop Water Filter Review

If you want to get clean water free of any type of contaminants, then Aquasana 4000 is the best filter system.

It can effectively convert the plain tap water into clean water, which is also great in taste.


Aquasana AQ-4000

  • No waste of water
  • Remove 76 contaminants
  • Easly Install
  • No Plumber Required
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Fortunately, you do not require any permanent installation to your kitchen sink or your system.

The reason is that Aquasana AQ-4000 is a fantastic water filter system that can attach to the faucets in seconds. Moreover, it also does not require any tools for installation.

Fit in a variety of kitchens:

This water filter system has a color-coded hose and has brass adaptors that can easily fit in various kitchen faucets.

However, if you want any extraordinary faucets, then you may require additional adaptors.

You can also go under the counter water filter for all in one pull out sprayer.

The contaminants which can remove with Aquasana AQ-4000

This filtration system can easily remove different types of contaminants.

However, the system uses submicron filtration and carbon and Ion exchange media to remove impurities.

It can easily remove:

  • Chlorine resistant cysts as cryptosporidium and giardia up to 99.99%
  • Chlorine and chloramines up to 97%
  • Mercury 95%
  • Lead 99.3%
  • Chemicals such as pesticides, herbicides, and VOCs 99%
  • Ibuprofen 95.4 %
  • Estron 96.5%
  • PFOA and PFOS 96%
  • So the Aquasana countertop water filter can remove 77 contaminants.
  • The flow rate of an Aquasana water filter is around 0.5 gallons per minute.
  • We can say that it is a bit slow process, but you should keep in mind that a good filter always requires more time and higher pressure to thoroughly remove the water’s contaminants.

Features of Aquasana AQ-4000

It is a thorough Aquasanaaq 4000 review in which you will get all the features of this filter system.

Activated carbon filter:

In this filtration system, an activated carbon filter is present, specially designed to reduce the total of 77 contaminants.

Not only are the pollutants reduced, but they also can be easily removed with the help of this carbon filter. 

Moreover, it is NSF certified, so you can purchase this system without any worry.

Flexible hose and diverter valve:

Aquasana installation is straightforward because it comes with a flexible hose as well as a diverter valve.

All you have to do is to just attach the Aquasana AQ-4000 to your kitchen sink faucet. You will require the hose diverter valve for it.

Ensure that you must have a standard faucet, and if you don’t have one, you must use the provider adaptor. The provider adapter helps fit the diverter valve to your faucet.

The filter unit of AQ-4000:

Aquasana countertop water filter is necessary for the completion of the filtration process.

Inside a rectangular white filter unit, a filter is specially designed to sit on a kitchen countertop.

Although it is the best system, the cylindrical unit is slightly different from the traditional units.

It takes a little bit more surface area but still a nice and compact one. So it is the ideal unit for those who do not have much counter space between the kitchen sink and wall.

Benefits of Aquasana AQ-4000

  • The main benefit of the Aquasana AQ-4000 countertop water filter is that it is NSF certified. Keep in mind that NSF is an international organization.
  • It can eliminate heavy metals such as lead and mercury.
  • Different organic Chemicals are also reduced and removed, such as herbicides and pesticides.
  • Fortunately, it can also remove chlorine up to 97%.
  • It also removes chlorine-resistant cysts such as cryptosporidium and giardia.
  • Moreover, it also removes different pharmaceuticals, such as Ibuprofen and estrone.

How does Aquasana AQ-4000 work?

Now the question arises in our mind how the Aquasana AQ-4000 countertop water filter works. It uses ClaryumTechnology and comprises a combination of 4 filtration methods.

  • Activated carbon 
  • catalytic carbon 
  • Ion exchange 
  • absolute submicron mechanical filtration

 Activated carbon:

The activated carbon filtration process in this system works in collaboration with Claryum Technology.

In this method, different herbicides, pharmaceuticals, volatile organic compounds, and pesticides are removed.

Activated carbon filtration also eliminates any kind of physical contaminants that may be present in the water supply.

Catalytic carbon:

In catalytic carbon, chlorine and chloramine are specifically removed.

Keep this thing in mind that catalytic carbon is a type of activated carbon with the help of which bacteria’s growth in the water supply is prevented.

Also, with the use of catalytic carbon, there is a difference in taste and odor.

It also promotes beneficial chemical reactions, which further increases the purification process.

Ion exchange:

The Ion exchange method usually filters out heavy metals present in the water. The heavy metals may be lead and mercury.

However, keep this thing in mind that ion exchange is the additional step in the filtration process in Aquasana, which also helps in making the water soft.

It also removes the different harsh chemicals and elements, such as calcium and magnesium.

Absolute submicron mechanical filtration:

In all other conventional methods of water filtration, the absolute submicron mechanical filtration process is not present.

So the Aquasana countertop water filter is one step further from other filtration systems and pictures.

It is also called absolute filtration in which it targets contaminants called asbestos and other chlorine resistant contaminants. So submicron mechanical filtration is the amazing process in which microns are removed.

Keep this thing in mind that microns are very small in size, and it is very difficult to target the tiniest elements present in the water.

So this system removes the microns such as enzymes and bacteria. 

Filtration Performance of Aquasana AQ-4000

Although Aquasana installation is very easy, it is also the best infiltration performance.

It is considered to be in the top position in the case of countertop water filters.

Moreover, it is NSF-certified and can reduce as well as remove a total of 77 contaminants. The contaminants include herbicides and pesticides, pharmaceuticals, mercury, lead, and PFOS. 

Along with all these things, the filter is more efficient than the other filters present in the market.

So Aquasana is the leading gravity-based system and will last for an average of 6 months. So we can say that it is much better than the other filters we have ever seen. 

Portability & Installation of AQ-4000:

The Aquasana AQ-4000 countertop water filter comes with a screw on the faucet adapter, so we can say that it is extremely portable.

Moreover, it is easy to remove and take it to the new location if you are living on rent.

Aquasana installation is very easy and handy with a conventional instructions booklet.

You can get enough information from the instructions manual with the help you can also do the proper maintenance, including filter changes.

The instruction manual is also good for people who want to learn through images.

However, the manufacturers also produce a useful video, especially for changing the unit’s filter. 

Pros and Cons Aquasana AQ-4000

  • Aquasana aq-4000 has easy maintenance and easy installation.
  • It effectively reduces the heavy metals in the water.
  • Moreover, it comes with two filtration stages.
  • Aquasana is NSF certified.
  • It is eco friendly and effectively removes pesticides.
  • Moreover, it comes with 90 days money-back guarantee.
  • The filtration comes with claryum technology.
  • Aquasana is only suitable for Municipal water.
  • It is not offering quality control options.
  • You have to change the filter for six months or less.


Aquasana AQ-4000 vs. Berkey vs. ZeroWater

If you want to get the highly pure water then an Aquasana countertop water filter is the best choice.

Fortunately, it comes with an NSF certification and largely relies on the tap water pressure rather than gravity.

It is because Berkey water filtration relies on gravity. The zero water filtration process also depends on gravity rather than the tap water.

Keep this in mind that Aquasana AQ-4000 is not so portable like Berkey and zero water because you cannot take it out for picnics and parties.

But still, Aquasana is the best option if you prefer robust filtration. 

The Bottom Line

Although the Aquasana comes with a great taste of water and is also prioritized by the people who want a countertop system, it still has a bottom line to change the filter after every six months or less.

But the Aquasana is affordable as well as of high quality. 

Aquasana AQ-4000W Countertop Drinking Water Filter System

Aquasana AQ-4000W is the best countertop drinking water filtration system that can reduce ten times more contaminants than the traditional gravity systems present in the market.

The good thing about this system is that it is NSF-certified and undergo claryum filtration technology.

Aquasana AQ-4000

Aquasana aq-4000 is independently tested as well as can remove 97% of chlorine and chloramines.

The system also reduces heavy metals, especially mercury, lead, and much more. Along with these contaminants, it also reduces organic chemicals and pharmaceuticals such as pesticides, herbicides, etc. 

Features of Aquasana AQ-4000

  • Aquasana AQ-4000W can reduce 76 other contaminants as well as 97% of chlorine.
  • The system assures that no waste or harmful contaminants are added in the drinking water during the filtration process.
  • The good thing about this filtration process is that along with contaminant removal; it also retains the healthy minerals such as potassium, calcium, and magnesium.
  • Lastly, the Aquasana installation is very easy and does not require any plumber.


It gives you only 11 cents per gallon, so it has 11 times more capacity than the leading gravity-based filtration systems.

Flow rate:

The flow rate of the Aquasana Countertop water filter is very good, and it is also considered to be the more robust filtration system.

Aquasana relies more on the tap water pressure rather than the gravity, which is mostly present in Berkey and zero water filtration system.

Filter life:

The filter life of Aquasana AQ-4000W is almost 6 to 12 months. It has one post filter cartridge for all whole-house systems, and sometimes the filter should be changed till six months or less.

Main Advantage of AQ-4000:

The Aquasana water filter system’s main advantage is that it can easily change tap water into healthy and good taste water. Moreover, it does not require any proper installation or permanent fixtures.


Aquasana countertop is NSF certified, so this filter system maintains the quality and performance of giving you pure water without any contaminants or pesticides. 

FAQs for Aquasana water filter

Does this Filter Purify Water?

As we all know that filtration is the best way with the help of which we can purify the water. If we talk about Aquasana AQ-4000, it is the best system that effectively filters the water. Moreover, it also gives you the crisp taste of water devoid of any chemical or contaminants. 

Do you need a plumber to install it?

No, Aquasana countertop water filters do not require any plumber to install the system. You can do the installation of this system by yourself. 

Is It Compatible with My Faucet?

Aquasana water is easily fit in most standard faucets, which usually comes with two adaptors. However, keep this in mind that this is not compatible with 2 in 1 faucet, which comes with a detachable sprayer at the faucet opening.

Is this Filter Renter-Friendly?

Yes, Aquasana AQ-4000 is renter-friendly because it does not require any installation of holes on additional water lines to your home. It can easily sit on your counter and ready for daily use.

Does this filter soften water?

Yes, Aquasana is famous for softness in the water. It provides the UV filter, which improves the quality of the water more efficiently.

The good thing about the filter is that it can remove the chlorine taste and other types of contaminants such as bacteria, viruses, and other impurities. So it is considered to be the best hard water softener, even for well water. 

How Do I Replace and Dispose of the Filters?

First of all, remove the ends of the filters where you have to recycle the plastic parts. You can also put the carbon in your garden because it is good for plant life, or you can just throw it out. 

Is Aquasana a good water filter?

Yes, Aquasana is the best and incredible water filter that gives you the greatest water from every tap water in your home. Moreover, it also removes 97% of chlorine in tap water and other harmful water contaminants for ten years or 1 million gallons. 

How long do Aquasana filters last?

Aquasana filters usually last for 6 to 12 months, but sometimes, it lasts for less than six months. It depends on the use of the filter system and how much water you are filtering out. 

What is the best water purifier on the market?

There are many kinds of efficient water purifiers present in the market from which you can use according to your choice and the efficiency of the water filtration system. However, the best water purifier is the one that is affordable and also good in quality and efficiency. 

What contaminants does Aquasana remove?

Aquasana AQ-4000W is NSF certified and can remove 99% of lead and 67 kinds of contaminants, including chloramines, pharmaceuticals, asbestos, industrial solvents, mercury, volatile organic compounds, pesticides, herbicides, PFOA, and PFOS. 

Does ZeroWater remove lead?

Zero water is also NSF certified just like the Aquasana AQ-4000 and is certified to remove lead and chromium 6. Moreover, it is also famous for reducing the pharmaceutical from your tap water. 


Aquasana AQ-4000W countertop water filter is famous for giving you ultrapure water without any contaminants or pesticides.

So it is famous for performing a good job in filtering the contaminants. However, it is an affordable water filtration system but a bit expensive to maintain, especially if you have more family members.

But we all know that drinking pure water is much more good than the money, although it requires constant filter replacement.

But from my perspective, you should go with this filtration system because of the quality performance it shows. 

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