Aquasana AQ 4000 Countertop Water Filter | Is it Worth It?

Product : Aquasana Water Filter AQ 4000
Type : Counter Top Drinking Water Filter
Filtration Stage : 2 Stage Filtration System
Product Warranty :  1 year
Suitable For : Rented Apartment, City Water, Small Household

Aquasana Is Known for Whole House Water Filter…Aquasana AQ 4000 on Sink

Aquasana is well know for it’s whole house water filter, has also compete in the drinking water filter segment. They have both under sink and counter top water filter. In this post, we will review the Aquasana AQ 4000 countertop water filter.

A NSF Certified Water Filter…
Aquausana has all their water filters certified by NSF, an international organization which certified and audit food, water and consumer products.

It is testified by NSF that the AQ 4000 is capable of:

  1. Remove up to 97% of chlorine
  2. Reduce heavy metals such as lead and mercury
  3. Reduce organic chemicals such as pesticide and herbicides.
  4. Chlorine resistant cysts such as giardia and cryptosporidium
  5. Pharmaceuticals such as estrone and ibuprofen

A detailed list of certification item is listed on this page.


Check The Price In Amazon


2 Stage Claryum® Filtration Technology…
Aquasana water filter uses their unique filtration technology called Claryum®. Aquasana claimed that it is capable of remove more than 10x more contaminants compare to the leading pitcher in the market.

Aquasana Claryum TechnologyThere are 4 different segments contained in the 2 stage filters.

  • Activated Carbon – reduces herbicides, pesticides and VOCs .
  • Catalytic Carbon – removes up to 97% chlorine and chloramines.
  • Ion-Exchange – removes lead and mercury.
  • Sub-Micron Mechanical Filtration – Captures asbestos and chlorine resistant cysts.

Meanwhile, it still retained the healthy minerals leaving delicious filtered water to consume.

Unlike Under Sink Water Filter, It is portable…
The Aquasana AQ 4000 water filter is extremely portable with just a screw on faucet adaptor on most of the usual faucet. It is easy to remove and move to a new location if you are renting an apartment.

No Professional Plumber Required for Installation… 
As there is no permanent fixture is needed, it isn’t required any professional plumber to install this system in your kitchen. You can do it yourselves under 2 minutes. Watch the video below on how easy the installation process is.

Alternatively, you can refer to the installation manual from Aquasana.

Unfortunately, not all faucet is able to fit the faucet adaptor for all countertop water filter. You can check out our under sink water filter guide as an alternative for countertop water filter.

$120 Annual Replacement Cost..Aquasana AQ 4000 Filter replacement
Maintenance is always not cheap for all Aquasana water filters. For the AQ 4000, the annual replacement is the highest among all counter top water filters due to it has 2 separate filtration stage.

It is recommended to change the filter cartridge every 450 gallons of water being consumed.

1 Year Warranty and 90 Days Money Back Guarantee..
Aquasana offers 90 days money back guarantee on their water filters. It is a great opportunity to take advantage of this offer to try out the Aquasana AQ 4000 today!  

Drawbacks for this system…
The main drawback is the expensive annual replacement cost. It cost more than the filter with one year of replacement.

Some of the customer complaints about the system being leaky. It seems like Aquasana doesn’t have a good quality control testing on their product before shipping out to their customers.

Technical Specification :
Product Weight: 3 lbs
Dimension: 7″L x 4″W x 12″H
Flow Rate: 0.4 GPM

  • Reviews by Existing Customers
  • Filtration Effectiveness
  • Quality of the Product
  • Maintenance and Replacement
  • Installation Easiness
  • Cost Effective (Price/Value)


In general, the Aquasana AQ 4000 water filter does perform a good job in filtering contaminants. However, it is kind of expensive to maintain it if you have a big family as it required constant filter replacement. Furthermore, the quality of the product is inconsistent. The overall score is SATISFACTORY.

Take full advantage on the 90 days money back guarantee and click on the link below to purchase you Aquasana AQ 4000 Water Filter now! Click Here for Latest Discount

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