Aquasana AQ-4000W Countertop Water Filter Review 2022

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This is our review of the Aquasana AQ-4000W Countertop Water Filter System.

We have vast experience in water filtration systems so we researched the best countertop water filter systems so you don’t have to waste your limited time. In this article, we will give an in-depth look at the Aquasana AQ-4000W Countertop Water Filter to help you decide if this water filter suits your needs.

We believe that the Aquasana AQ-4000W Countertop Water Filter is a good choice as this system is NSF-certified to remove several different types of contaminants without removing important minerals from the water, is portable, easy to install and maintain, and presents a competitive price.

In this comprehensive Aquasana AQ-4000W Countertop Water Filter review, we will analyze the filtration capabilities, the system capacity & longevity, its flow rate, the installation & maintenance process, and discuss customer reviews and potential alternatives for this countertop water filter system.

Let’s get started!

Aquasana AQ-4000W Countertop Water Filter Overview

The Aquasana AQ-4000W Countertop water filter POU (point-of-use) system is quite easy to install in which you connect the device to your faucet, and then it’s ready to deliver clean water.

Because of the simple installation and its compact size and lightweight, it becomes easy to move it to different locations if you need to take it to other places like an office, RV, apartment, or another household.

The Aquasana AQ-4000W Countertop Water Filter is a powerful filtration system from one of the top water filtration brands – Aquasana – that uses its NSF Certified Claryum filtration technology to remove 77 types of different contaminants, turning the water fresh and clean to drink and cook.

This water filtration system should last 6 months or 450 gallons of water until it needs to replace its filters. While in line with most competition, there are a few other top countertop competitors with more capacity and long-lasting filters.

Aquasana AQ-4000W Countertop Water Filter Filtration Capabilities

The Aquasana AQ-4000W Countertop uses patented Claryum filters capable of removing up to 99% of more than 77 contaminants usually found in the water, such as chlorine, chloramines, VOCs, PFOA & PFOS, pathogens, heavy metals (lead, mercury, etc.), cysts, sediments, rust, herbicides, pesticides, pharmaceuticals, and more.

And this filtration capacity is ensured as the Aquasana AQ-4000W is NSF certified, which certifications 42, 53, 401, and P473:

  • NSF 42: guarantees that the system can remove chlorine, bad taste & odors
  • NSF 53: validates that the system can remove cysts, lead, asbestos, and VOCs
  • NSF 401: certifies that the system can remove pesticides, herbicides, pharmaceuticals, and detergents
  • P473: which ensures this system can remove PFOA and PFOS

Being NSF certified differentiates the Aquasana AQ-4000W Countertop Water Filter from other top competitors as it ensures that this system was independently tested to remove contaminants as claimed.

The Aquasana AQ-4000W Countertop Water Filter uses 4 filtration steps to be able to remove so many different types of contaminants, namely:

  • Activated Carbon: In this step reduces VOCs, pharmaceuticals, herbicides, and pesticides
  • Catalytic Carbon: In this step chlorine and chloramines are reduced by up to 97%
  • Ion-Exchange: In this step heavy metals are filtered out from the water
  • Sub-Micron Mechanical Filtration: In this step cysts, asbestos, and other contaminants are removed

It is important to notice that no relevant minerals like calcium, magnesium, and potassium are removed from the water, ensuring that these healthy minerals are kept in the final filtered water.

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Aquasana AQ-4000W Countertop Water Filter Capacity & Longevity

The Aquasana AQ-4000W Countertop Water Filter has the capacity to filter up to 450 gallons of water, which usually lasts around 6-months for an average-sized family.

While not bad and on the average of other countertop water filters, the longevity of the Aquasana AQ-4000W filters is not as good as some other top competitors that can last much longer.

When considering the cost at the time of buying a countertop water filter, it is important to factor in the recurring cost of having to replace filters twice a year.

Aquasana AQ-4000W Countertop Water Filter Flow Rate

When choosing a countertop water filter an important factor to take into account is its flow rate, as it will let you know how much time it will take to filter the amount of water that you and your family will need.

The Aquasana AQ-4000W Countertop water filter has a flow rate of 0.5 gallons per minute (GPM), which is still good enough to fill a cup of water in a few seconds, but you will notice a slower flow of water.

Some other top countertop options have 2 or 3 times the flow rate, but 0.5 GPM is enough for typical daily use, and you won’t have to wait to get filtered water.

Aquasana AQ-4000W Countertop Water Filter Remineralization

While the Aquasana AQ-4000W Countertop Water Filter doesn’t include a remineralization step like other countertop filters in which beneficial minerals are added back to the water to increase its alkalinity and improve its taste, in reality, it’s not needed.

The Aquasana AQ-4000W does not remove calcium, potassium, or magnesium during its filtration process, so these healthy minerals are kept in the filtered water. Other filters feel the need of remineralizing the water because during the filtration stages they remove these healthy minerals from it, which is not the case with this water filter device.

Aquasana AQ-4000W Countertop Water Filter Installation & Maintenance

The Aquasana AQ-4000W Countertop Water Filter, like most countertop water filters, is simple and easy to install as you don’t have to cut pipes or follow complicated instructions that sometimes need professional help to complete. You just need to assemble the system and connect the tube to your kitchen faucet, and that’s it.

You should be able to set up the Aquasana AQ-4000W Countertop by yourself in a few minutes. Watch below a short video that explains how to install the Aquasana AQ-4000W Countertop Water Filter:

If you prefer to read an instruction manual, you can find the installation manual here: Aquasana AQ-4000W Countertop Water Filter Installation Manual 

Maintaining this water filter device is quite simple, as you only need to change the filters according to the manufacturer’s indications, around every 6 months.

Aquasana AQ-4000W Countertop Water Filter Reviews

On the Amazon website, the Aquasana AQ-4000W Countertop Water Filter has an average rating of 4.2 with hundreds of reviews.

On Aquasana’s website, the rating is also quite good, with a 4.5-star rating with more than 1.000 reviews.

This shows how happy customers are with Aquasana AQ-4000W Countertop Water Filter, which they will recommend to others.

Aquasana AQ-4000W Countertop Water Filter Alternatives

If the Aquasana AQ-4000W Countertop water filter system isn’t the ideal solution for your household, there are other alternatives that you can consider.

APEX MR-1050 Countertop Water Filter

One of our favorite countertop water filtration systems is the APEX MR-1050.

The APEX MR-1050 Countertop Water Filter is a great combination of an affordable system that delivers lots of top features, like a powerful filtration capacity to filter up to 99% of water contaminants, a remineralization stage to add back beneficial minerals to the filtered water, looks nice in any kitchen, and it’s easy to transport, install and maintain.

AquaTru Countertop Reverse Osmosis System

If you prefer a countertop Reverse Osmosis system this is the right choice.

The AquaTru Countertop Reverse Osmosis System is a well-designed modern RO system that fits well in every kitchen, does not require installation, has a really low waste-water ratio, and removes several contaminants through a 6-stage filtration process.

Waterdrop WD-CTF-01 Countertop Water Filter

Another great alternative is the Waterdrop WD-CTF-01 Countertop Water Filter.

This affordable countertop filters up to 99% of water contaminants through a 5-stage filtration process, has a durable filter that filters up to 8.000 gallons of water, delivers a great water flow of 1.6 GPM, and it’s made of high-quality food-grade stainless steel that looks really good and provides extra security.

Apart from this, it also includes a remineralization stage to make the water more alkaline, tastier, and healthier and it ensures that you have access to healthy minerals.

Note: You can use our code WFP10 for a 10% discount

Our Verdict

We highly recommend the Aquasana AQ-4000W Countertop Water Filter system, and we included this product in our selection of the best countertop water filters.

This countertop water filter is NSF certified to remove up to 77 different harmful contaminants from the water, it is compact, portable, and easy to install and use, making it a great choice if you are looking for a countertop water filtration system.