Aquasana 3-stage Under Counter

Aquasana 3-stage Ratings

Design - 88%
Features - 89%
Performance - 83%
Capacity - 92%
Ease of Use - 89%



This Aquasana drinking water filter has great large capacity, an easy to replace three-stage filter, three sleek designer faucets, and an audible indicator to alert you when it's time to replace the filters.

User Rating: 3.74 ( 8 votes)

An investment in your health and well-being is never too costly; but how can you find the right filtration system? There are many ways, and one of them is reading the water filter system reviews on our website; they only present some of the best products on the market and detail the pros and cons that define them, thus allowing readers and prospective buyers to find a product that matches their needs.

Aquasana 3-stage Under Counter Drinking Water Filter Aquasana 3-stage Under Counter Drinking Water Filter picture

The model we will review today is the Aquasana 3-stage under counter; Aquasana is a renowned manufacturer, and they produce a wide range of filtration systems to cater to a variety of needs. Today’s product is a drinking water filter, so it will only provide water fit for drinking and cooking, but it doesn’t have the capacity or technology to purify water for bathing purposes as well; those are whole house systems, and if that’s what you’re interested in, check out our other reviews.


Because it is an under the counter system, it must have a rather appealing design; the three-step filter container is made from white plastic casing and is mounted under the counter or the sink; the three filters are twist-off, so you can easily replace them when the time comes. The overall system also comes with fitting brackets, screws and fittings, and a slim faucet that will protrude from the sink’s surface; this delicate but efficient faucet is tall and bent, allowing you to fill any kinds of containers, from a simple glass to a wide and deep pot. You can choose from three color and metal types of faucets to match the rest of your sink or fixtures: Brushed Nickel, Chrome, and Oil Rubbed Bronze. Thus, you can even match the Aquasana to a design-conscious kitchen without worrying it might ruin the overall decorum.

Aquasana 3-stage Under Counter Drinking Water Filter Aquasana 3-stage Under Counter Drinking Water Filter picture


It is one of the most efficient water filtration systems on the market; it removes and reduces over 60 types of contaminants from the water, including herbicides, pesticides, VOCs, MTBE, chlorine and chloramine, lead, mercury and other metals, asbestos, giardia, cryptosporidium, and others. All the healthy minerals like calcium, potassium, and magnesium are kept, leaving you with clear, great-tasting water that will even improve the taste of your coffee or tea, and even the foods you’re cooking. The average life of the Lithium battery lasts about 1590 hours, and that’s what you have to worry about remembering to replace from time to time, otherwise, you won’t know when the cartridges are expired.

More importantly, this Aquasana product is also NSF/ANSI certified, receiving approvals for Standard 42 which ensures removal of aesthetic and non-health threatening contaminants like chlorine and chloramine, and Standard 53, which ensures the elimination of health-threatening contaminants, such as the ones presented above. Furthermore, it is eco-friendly as well, because its smart design reduces the quantity of plastic used and other disposable parts.

Specifications Sheet

Type Under counter
Filtration stages 3
Filter media 20-micron pre-filter, activated carbon filter, catalytic carbon filter, ion-exchange filter, absolute sub-micron mechanical filter
Filter lifespan 6 months
Filter life indicator Yes
Chlorine removal rate 97%
Flow rate 0.5 gallons per minute
Certifications NSF/ANSI certified, Standard 42 and 53
DIY installation Yes
Warranty 1 year


Getting on to more practical aspects, it has a flow rate of 0.5 GPM (gallons per minute) – this is slightly less than other products in its category, but it’s still efficient and fast enough for its purposes. The spout height of the faucet reaches 7 inches and features one handle. There seems to be no information about the temperatures it can stand, but it is more likely intended for use of cool water. The cartridges have the capacity of purifying about 600 gallons of water; this is approximately the equivalent of 6-months’ validity, depending on how you use it. It also utilizes one Lithium Metal battery that serves the performance indicator located under the counter; the performance indicator shows you when it’s time to replace the cartridges, so you won’t have to worry too much about forgetting this part.

Aquasana 3-stage Under Counter Drinking Water Filter Aquasana 3-stage Under Counter Drinking Water Filter picture

As for what it is composed of, it features a 20-micron pre-filter that eliminates sediment, rust, and silt, thus prolonging the filter’s capacity and preventing it from clogging. The other media are represented by an Activated Carbon filter that reduces organic chemicals, a Catalytic Carbon filter that eliminates chlorine and chloramines, an Ion-Exchange media that traps heavy metals, and the Absolute Sub-Micron Mechanical Filtration that we mentioned earlier. The lifetime indicator is both visible and audible, so you are alerted when it’s time to replace cartridges, something that is done in a few easy steps – you unscrew the container, remove the old cartridge, put the new one in, and screw back in; you do this three times, and it is back at full capacity.
Aquasana 3-stage Under Counter Drinking Water Filter Aquasana 3-stage Under Counter Drinking Water Filter picture

Ease of Use

The installation can be done by any homeowner by following the instructions in the manual; it should be easy to do so with regular tools, but the more difficult part has to be drilling a hole through the sink to install the faucet; some sinks feature a dish detergent dispenser, so if you’re not using it, you can just remove it and install the faucet in place. Otherwise, the system of replacing the actual cartridges is very, very easy and only takes a few minutes. The battery lasts long enough, but it too is easy to replace – both replacement cartridges and the battery can be bought from your retailer, or ordered directly from the manufacturer.

Aquasana 3-stage Under Counter Drinking Water Filter Aquasana 3-stage Under Counter Drinking Water Filter picture

Other Considerations

This product reduces chlorine from your water by 97%, so it is very efficient against this common contaminant. The manufacturer offers a 90-day guarantee, after which you can get your money back or a replacement filter if you are not satisfied with the product. The whole system costs about $175, which is quite cheap for its category; however, it only receives a 1-year limited warranty for parts and labor, so it’s all in the balance there. Although it has a lower flow rate than other brand products, this Aquasana filter has a larger capacity than those same products, offering 600 gallons of pure water with every set of filters.

Customer Feedback

Positive reviews: Negative reviews:
”Thumbs up for customer support, they always answered nicely to my requests.”

”Love the fact that it installs under the sink, it went perfectly in my tiny kitchen.”

”As opposed to my previous system, cartridge replacement is quite cheap.”

”Finally, my water doesn’t taste like chlorine thanks to it.”

”Had it for 2 years now, best purchase I ever made, didn’t have one problem with it.”
”Had a little trouble installing it, but I’m usually clumsy with these sorts of tasks.”

Frequently Asked Questions

1. What type of filtration media does it utilize?

The system passes the water through 3 different filtration stages, using a 20-micron pre-filter, an activated carbon filter, a catalytic carbon filter, and an ion-exchange filter to purify the water and eliminate dangerous chemicals, bacteria, heavy metals, and numerous other types of contaminants.

2. What is its efficiency rate in terms of chlorine removal?

Chlorine is an omnipresent contaminant as it is used by the municipal system in the treatment and cleansing process of potable water. This means that tap water is inevitably contaminated by high amounts of chlorine. Fortunately, this Aquasana filtration system helps reduce chlorine content with up to 97%, making the water you use and drink free of the unpleasant taste and smell normally left by this agent.

3. How often should the cartridges be changed?

The filters utilized by the system to purify your drinking water should be replaced after filtering approximately 600 gallons of water. Depending on how often you use the product, the filters should last for about 6 months until they need to be replaced, which is a more than reasonable lifespan.


  • Abraham

    I bought this product a couple of months ago. In addition to being great when it comes to cleaning the water, it’s very easy to install as well. My sink has a dish detergent dispenser, so I didn’t have to drill another hole for the filter. I wasn’t using that dispenser anyway, so this wasn’t a problem at all. All in all, I am happy with the choice I made and I strongly recommend it to others as well!

  • Lynette

    I tested the tap water last week. Apparently, the water has large amounts of fluoride and chlorine in it. If I install this under counter filter, will it remove these contaminants?

    • Unfortunately, the Aquasana 3-stage model won’t be able to remove the fluoride that lurks in your tap water. On the other hand, it will effectively remove the chlorine and a lot of other potentially harmful chemicals and bacteria that may be found in it.

  • Alden

    I see that it comes with its own faucet. Does this mean I will have to remove my sink faucet?

    • Keeping the actual faucet that you have won’t affect the functioning of the filter. However, you will no longer be using it because you will get water from the filter’s faucet but there is no need to remove it either.

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