Aquasana Under Sink Water Filter: Best 2 & 3 Stage Max Flow?

Last Updated on December 30, 2023 by Richard

These three Aquasana under sink water filter options are just what most city water users need to save money and stay safe.

If your water tastes like chlorine, smells like rotting eggs, and looks like crap – keep reading.

The best choice is the 3-stage Max flow filter system with your choice of lead free faucet – Click Here

Why Do I Need The Aquasana Under Sink Water Filter?

Water filtration is one of the most critical maintenance systems in your home. Protecting your family from pollutants in their food, drinks, and even the dishes they eat off of is essential for their long-term health.

From water that tastes and smells better to removing harmful chemicals, you’ll notice an immediate difference in your tap water after installing the Aquasana Under Sink Water Filtration System.

The simple installation process and NSF certified filters are a proven solution to removing pollutants your local water system missed. With three different purchase options and replacement filters readily available, you won’t be without fresh, clean water again.

Manufactured by a dedicated company that strives to provide clean drinking water and maintaining environmental health, the Aquasana Under Sink Filter System is the ideal in-home water treatment option.

Waterborne illnesses and contaminants commonly found in natural bodies of water like lakes and rivers often escape local water treatment facilities. These facilities use chlorine to kill bacteria, a chemical that also causes odor and discoloration to your drinking water. The right filtration system provides healthier, delicious water for your family.

Several factors play into purchasing the right water filtration system for you and your family. Taking into account the installation, cost, your local water grade, and NSF certifications, knowing the water filter that you need are vital to healthier drinking water.

The Aquasana Under Sink Water filtration system comes in two options with available replacement filters. With simple installation, the right certifications, this water filter is perfect for most consumers.

How Does It Work?

The Aquasana Under Sink water filtration system is simple to install and doesn’t require a plumber. The filter cartridges are strategically located for simple replacement. The engineers designed the product so that anyone could install the system or replace the filter. Each filter comes with one of three faucet options.

Before the unfiltered and possibly dangerous water leaves the faucet, it is filtered through either a two or three-stage filtration setup. The most effective filter is the Max-Flow option. This setup contains Activated Carbon, Catalytic Carbon, an Ion-Exchange filter, and a sub-micron mechanical filter for better tasting and cleaner drinking water.

The Activated Carbon filter is the most popular form of water filtration on the market today. This carbon filter is the part of your filtration system that captures pharmaceuticals, herbicides, volatile organic compounds, and industrial additives.

The Catalytic Carbon filter protects your family from PFOS and PFOAs. These chemicals lead to liver disease, high cholesterol, obesity, thyroid disease, and more. This specialized filter focuses on removing the harmful by-products of gasoline commonly found in water systems.

The Ion-Exchange filter’s job is to remove any harmful heavy metals from your family’s drinking water. Although lead and mercury are two of the more common heavy metals found in drinking water, this filter is trusted to remove many more.

Finally, your water receives one more cleansing through the sub-micron mechanical filter. Capturing chlorine that alters the taste and color of your water, this filter is set to provide cleaner, better-tasting water. This process also removes asbestos and cysts (cryptosporidium and giardia that exist naturally in bodies of water like rivers and lakes; these cause intestinal issues).

With all of these filters working together, they are certified to remove 77 pollutants from your drinking water.

The additional filter on the Max-Flow option increases water flow while providing the same great, better-tasting water as the other two options.

Aquasana 3-Stage Max Flow Claryum Under Sink Water Filter System - Kitchen Counter Claryum Filtration - Filters 99% Of Chlorine - Brushed Nickel Faucet - AQ-5300+.55 , White
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Aquasana 3-Stage Max Flow Claryum Under Sink Water Filter System – Kitchen Counter Claryum Filtration – Filters 99% Of Chlorine – Brushed Nickel Faucet – AQ-5300+.55 , White
  • Instantly Transform Tap Water Into Clean Extraordinary Water – Reduces up to 99% of 78 contaminants including chlorine, lead, pesticides, PFOA/PFOS, & more while leaving healthy minerals. This system will NOT reduce Total Dissolved Solids (TDS)
  • High Flow Rate – This system powers through a half-gallon of water every minute. No need to wait for clean water compared to traditional drip filters.
  • Cost Efficient & Long Lasting – The most economical filter on the market at less than 10 cents per gallon filtered. Lasts for 6 months or 800 gallons before a replacement filter is needed.
  • Easiest Filter Replacement – Replacements are engineered for ease. No need to disconnect hoses or water lines. housing easily twists off for snappy replacement!
  • Includes first set of filters and all parts required for Installation. Please review owner’s manual before setting up. Bluetooth logo may appear on the box or product if included in the hardware, but no compatible software is provided or supported.

What Comes In The Box?

Of course, you’ll receive the filters and the system. You’ll also have ½ inch fittings to connect your system to your existing plumbing infrastructure. When making your purchase, consider the color of your new faucet.

Each Aquasana Under Sink filtration system comes with a new faucet. You have the choice of purchasing the Brushed Nickel, Oiled Bronze, or Chrome finish. To ensure your kitchen décor matches the harmony of your home, you will receive this faucet with your new filtration system.

What To Look For When Buying A Filter

As stated previously, there are a few things you’ll need to look for before purchasing a water filtration system. Some systems offer reverse osmosis, which is perfect for removing many contaminants. Unfortunately, these systems also deplete healthy bacteria and nutrients. If you’re on a public water system with no Cadmium reported, the Reverse Osmosis systems are not right for your needs.

The task of installing a water filter plays a large part in picking the perfect filtration system. Some models sit on the countertop while others require plumber’s knowledge to install the unit and ensure no leaks are present.

If you live in an apartment, rental property, or use a camper often, you’ll need a filter that is compact and doesn’t alter the structure. An under the sink filtration option is perfect for most homes and residences.

Certain filters have restrictions and limitations on their filtering capabilities. Knowing your local water grades is essential before purchasing a filtration system.

As seen in some areas, more harmful chemicals, pollutants, and pesticides are present in the drinking water. If the filter you purchase isn’t certified to remove these impurities, you and your family can be at risk of illness.

Check the manufacturer’s recommendations for how often you should change your filter. Most filters need replacement after six-months. Others may last longer, and some need replacements more often.

The important thing to remember about replacing water filters is not how often, but how many gallons. Once you’ve reached the recommended number of gallons, the filter becomes ineffective. Check the details to understand how many gallons of water your filter is rated to treat.

Finding and replacing filters can be a hassle. Before making a purchase, ensure that the filtration system you’d like to install has plenty of filter options available. These filters should also match the NSF certifications of the original filter.

What Does The Aquasana Under Sink Water Filter Installation Look Like?

One of the more important aspects of your filter system is how easy it is to install and maintain.

As a system that doesn’t require any permanent alterations made to your home, the Aquasana Under Sink water filters are perfect for rentals, small apartments, and even campers.

Simply attach the tubing to the existing plumbing under your sink and replace the faucet with the Chrome, Brushed Nickel, or Oiled Bronze faucet included with your filtration system. Proper installation may require a few standard tools to attach the connectors.

Once installed, run water through the filter for 10 minutes. Running cold water through the filter helps to ensure there aren’t any leaks. With the pre-lubed O-rings, you won’t need to oil any of the parts. These parts come packaged with easy installation in mind.

Once installed, you’ll need to change the filter every six months. As stated previously, this can be done easily by unscrewing the filter housing and replacing the new one. The helpful indicator lets you know when it’s time to change this filter.

The Filtration Process

Depending on the purchase you make, you’ll have to change the filter every 500, 600, or 800 gallons. This is simple with the Aquasana Under Sink filtration system. When it’s time to change simply unscrew the filter housing, remove the old filter, and insert the new one. After screwing the housing back to the attachment, you’re all set. That’s all there is to it.

Worried you won’t remember to change the filter? The Aquasana Under Sink component will alert you when it’s time to change. Because the filter is so effective, you’ll also notice a difference in the smell and taste of your water once it stops working.

Due to its oversized filter options, the Max-Flow filtration system has a longer lifespan than the other two options. Although all three are rated for six months of use, family size may affect how often you need to change your filter.

It’s important to retain healthy minerals in your water, such as Magnesium, Calcium, and Potassium. The Aquasana Under Sink filters remove 77 contaminants while leaving healthier additives. Unlike reverse osmosis filters that remove everything, these filters provide the perfect balance.

Chemicals In Water

Heavy metals, such as lead, can cause severe illnesses and developmental issues to those who drink unfiltered water. Chlorine, Mercury, and asbestos can also escape through standard water treatment flowing from your tap into your family’s food and water.

These chemicals can be naturally occurring or added during the water treatment process. They can also contain contaminants from old water pipes and a poorly managed infrastructure.

These pollutants are harmful to your health. In the case of heavy metals such as lead, young children are especially vulnerable to development delays and health issues.

Some particles, like total dissolved solids, are even more difficult to capture in mass treatment facilities. These pollutants are by-products of waste, heavy metals, and sediment.

Aquasana Under Sink Water Filter Replacement – Claryum Direct Connect Under Counter Filtration System – AQ-MF-1-R
  • Easy DIY Under Sink Filter Replacement – Simple 3-step replace with no need for extra tools or parts. For best performance, replace filters every 784 gallons or 6 months.
  • Genuine Aquasana Water Replacement – Removes up to 99% of 77 contaminants including lead, mercury, asbestos, herbicides, pesticides, pharmaceuticals, and more!
  • Retains What Makes Your Water Healthy – Filters out harsh contaminants while retaining naturally-occurring minerals like calcium, magnesium, and potassium. Does not reduce TDS.
  • Designed With The Environment In Mind – One filter replaces more than 6,250 plastic water bottles.

Your Health

From cysts, to cancer, and other ailments, the impurities in your tap water can add to your health issues or even cause severe illness. According to the Environmental Protection Agency, drinking unfiltered water can lead to Cholera, Typhoid, and Dysentery. Although these ailments are rare in the U.S., there are still health concerns with contaminants in tap water.

According to the EPA, the average American drinks one to two liters of water per day. That is a lot of potential for harmful by-products if the water is left untreated. Common medical issues that result from improperly treated water (or treated water when considering additives such as chlorine) are prevalent in many citizens.

These medical conditions consist of mild issues such as skin disorders or more severe long-term conditions that affect the organs and the nervous system. Commonly found in tap water, bacteria and viruses can lead to stomach issues, problems with the digestive tract, and even kidney failure.

Those who suffer from issues with immunity are at an even higher risk for ailments. Cancer patients and those with AIDS are more susceptible to the bacteria carried in unfiltered tap water.

Your Local Water Grades

Each public water system partakes in a grading system. Even in the U.S. under the watchful eye of the Environmental Protection Agency, many of these local water systems fail to protect communities.

There are several contributing factors to the health of your tap water. Whether it’s poor management of the water treatment system in your area or an aging water infrastructure, you’ll likely have some contaminants in your tap water.

Understanding your local water grades will help you to choose the perfect filtration system. The Aquasana Under Sink filtration options remove 77% of the most commonly found pollutants in tap water. Others with more severe water system issues may need to look at reverse osmosis systems.

Although the list is quite long, contaminants in tap water generally contain pollutants from various sources. Massive industries and farming, human and animal waste, and even additives are all factors to consider when purchasing your filtration system.


From farming to manufacturing facilities, petroleum and heavy metals seep into groundwater, lakes, and rivers contaminating your drinking water. These solvents can cause health issues to anyone exposed to them.

Trash floating in a polluted river with a power plant in the background.
Many cities take their drinking water from polluted rivers and lakes. Not all of the chemicals are removed by the water treatment plant. That is why you need an Aquasana under sink water filter.

Organic Waste

Both animal and human waste are often found in water systems across the country. Microbes carried from waste facilities, sewers, and septic tanks can leak into drinking water or travel through treatment facilities undetected.

These unhealthy contributions add to your tap water’s taste, discoloration, and adverse health effects.

Water Treatment Chemicals

It’s no secret that water treatment facilities use disinfectants to kill bacteria and viruses in drinking water. Unfortunately, these chemicals remain in the water and flow into your home. Chlorine and other chemicals are easily removed with a simple under sink filter.

Other Pollutants

As mentioned above, Cholera and Typhoid aren’t exactly worrisome for those who use city treated water in the modern era. There are still bacteria and viruses such as arsenic and radionuclides in drinking water today.

Choosing The Right Aquasana Under Sink Filter For You:

The Aquasana Under Sink filtration system comes in two separate options with three popular filter replacement options.

With the option to install a Chrome, brushed nickel, or oiled bronze faucet, these filters can match any kitchen décor. For any plumbing that matches the standard ½ inch couplings, this filter option will work in most homes with no need for a plumber.

Things To Beware Of

Depending on your household size, the three filter options will provide fresh and clean drinking water. As the filters are rated to last for six months, it’s important to remember that the 2 Stage Claryum® filter provides 500 gallons of fresh drinking water. Those with larger households may use more water, meaning the filter needs to be changed more often.

Although this is an excellent way to filter water in your kitchen, pollutants can be present in your shower, bathroom sinks, and laundry room as well. This simple system is designed only for kitchen sink use. Those with especially chlorinated water may consider a shower unit to add to the under-sink filter system.

Each water filtration option comes with a new kitchen faucet. It is recommended to use the faucet that comes with the system rather than another brand or model. These faucets are designed to control leaks and maximize filtration. Using another faucet may reduce flow, filtering capabilities, or lead to water damage.

If replacement filters are not properly maintained and changed properly, the filtering capabilities will be diminished. This means harmful pollutants and chemicals will pass through the filter, or water pressure will decrease.

NSF Certifications

The National Sanitation Foundation is a third-party watchdog service that tests and certifies filters for consumers. Through rigorous testing and yearly check-ups, the NSF certification and stamp are what you’ll need to look for when choosing a filtration system.

You may have seen the NSF certification on water filters. The watchdog group uses a number system to define what each filter is capable of removing. For the Aquasana under sink filters, they’ve received a rating of 42, 53, 401, and P473.

Let’s review what these standards filter:

42 – The NSF 42 rating focuses on a filter’s ability to remove chlorine, odor, and discoloration from water.

53 – NSF 53 is the rating for a filter’s cleaning abilities that focus on harmful bacteria, chemicals, and metals. These contaminants consist of lead, cysts, volatile organic compounds, and more. For these products that are often found in tap water; the NSF 53 is incredibly important to your family’s health and safety.

401 – Emerging contaminants are those that are not yet proven to present adverse health effects in public drinking water. The NSF 401 category includes pharmaceuticals such as Ibuprofen, DEET, Atenolol, and more. With these medicines commonly found in public water systems, the 401 rating is an essential rating for water filtration systems.

P473 – This rating removes the PFOS and PFOAs commonly found in tap water. Used in both industrial and consumer products, these contaminants remain present in groundwater despite an early 1990’s ban. Due to the health risks associated with these pollutants, the Aquasana Under Sink water filtration system is effective at reducing the harmful contaminants.

It’s important to know that the NSF also tests filters yearly. In order to maintain these certifications, the Aquasana Under Sink filter must continue to pass these rigorous certifications.

The tests are designed to ensure that the filter is effective, but that it also lasts. A filter will not receive the approval stamp if it does not stand up to the recommended amount of water that keeps your water safe and clean.

Pollutants removed:

The Aquasana Under Sink water filtration system is NSF certified as stated above. This particular water system is capable of removing the following contaminants:

  • Heavy Metals (including Lead and Mercury)
  • TDS (Total Dissolved Solids)
  • Herbicides
  • Pesticides
  • VOCs (Volatile Organic Compounds)
  • Pharmaceuticals
  • PFOAs
  • PFOS

Removing toxic pharmaceuticals and pollutants from the water flowing from your faucet is another way to protect yourself and your family from harm.

Environmentally Friendly

It’s tempting to purchase bottles of filtered water. They’re low-cost and convenient. Unfortunately, so many bottles of water are consumed every year that the environment is overwhelmed with plastics and waste that isn’t biodegradable.

Aside from the environmental impact, you’re neglecting to address the pollutants in water that you cook and clean with. Washing dishes and produce with contaminated tap water passes those pollutants to you and your family.

The EPA doesn’t have jurisdiction in water that comes from other countries. Bottled overseas, heated and cooled during transport in plastic bottles made of various chemicals, is another reason to eliminate plastic pre-bottled water from your lifestyle.

As the environment is a concern with bottled water, it is also a concern for water filters. The Aquasana Under Sink filters are made of 95% biodegradable carbon. This means that they can be easily disposed of with other household garbage without doing unnecessary harm to the environment, plant, and animal life.

The Aquasana Products:

The Aquasana Under Sink system has three distinct options. All contain the Claryum® water filters. With three filters, the 3-Stage Max Flow, and the 3-Stage standard components offer an additional filter. This third filter removes large sediment extending the life of your filters.

All three filter options are NSF certified to remove harmful and unsanitary contaminants, including 99% of lead. Choosing the filter option that is right for you is easy.

Claryum® 3-Stage Max Flow

At only $0.08 per gallon, the 3-Stage Max Flow filtration system provides a longer lifespan, at a lower cost per gallon than the other options. Maximizing the amount of fresh, clean, delicious-tasting water means fewer filter changes.

At 0.72 gallons per minute, this max flow filter is forty-four percent faster than the other models and cleans 800 gallons of water.

Faucet finish designations can be chosen at check out:

  • AQ-5300+.62 Oil rubbed bronze
  • AQ-5300+.55 Brushed nickel
  • AQ-5300+.56 Chrome

Aquasana Claryum® 3-Stage Max Flow under sink water fliter

Get The Best Aquasana Under Sink Water Filter System – Click Here Now

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Claryum® 3-Stage

Using the same activated carbon and catalytic carbon filters as the Max Flow option, this filter setup removes pharmaceuticals, pesticides, chlorine, VOCs, and MTBE.

The third filter acts as a prefilter, consuming any materials that may clog the line, expanding the life of the filters.

This $0.09 per gallon solution to healthier, better-tasting water will last for six months or six hundred gallons.

With proper installation and upkeep, you will receive one-half gallon of fresh filtered water every minute.

Faucet finish designations:

  • AQ-5300.55 Brushed nickel
  • AQ-5300.56 Chrome
  • AQ-5300.62 Oil rubbed bronze
Aquasana Claryum® 3-Stage under sink water filter

Get The Brushed Nickel Faucet (AQ-5300.55) or Choose A Different Faucet – Click Here To Choose

Also available at Amazon - Click Here 

Claryum® 2-Stage

Removing 77 of the most commonly found chemicals and pollutants from your tap water, the 2-Stage filtration system is a compact and simple to use under sink filter.

This option is only missing the prefilter, which does affect the life of each filter within the component.

The 2-Stage filters will need replacing every six months or five hundred gallons.

At $0.10 per gallon of clean water, the 2-Stage filter has the same half-gallon per minute capacity as the standard 3-Stage system.

Faucet finish designations:

  • AQ-5200.55 Brushed nickel
  • AQ-5200.56 Chrome
  • AQ-5200.62 Oil Rubbed bronze
Aquasana Claryum® 2-Stage under sink water filter

Check The Price On This Oil Rubbed Bronze Faucet and Filter System – Click Here

Also available at Amazon - Click Here 

Aquasana Under Sink Water Filter Replacements

Each Aquasana Under Sink replacement filter is engineered for easy removal and installation. Not only will you be pleased with the simple installation process, but these filters are also readily available and in stock. When your filter system alerts you, it’s time for a change; there won’t be an extended waiting period for a new replacement.

Each filter is rigorously tested and certified by the NSF to remove pollutants and chemicals. The replacement filters have the same ratings as the filtration systems listed above. The required household water pressure (PSI pressure per inch) to use these filters is a minimum of 20 PSI and a maximum of 80 PSI.

The following replacement filters are compatible with the filtration systems listed above.

Max Flow AQ–5300+R Replacement Filters

The AQ 5300+R Max Flow replacement filter  set includes the 20-micron mechanical filter as the first filter. Cleansing the water of larger debris, this component in the filtration system is what gives a longer lifespan.

Removing any harsh sediment, the additional filter and larger tanks allow the water to flow at a faster rate.

This replacement filter is ideal for the Max Flow filter system. Replaceable every six months or 800 gallons, this is the longest lasting filter available.

AQ-5300R Replacement Filter

Compatible with the standard 3-Stage filter system, the AQ-5300 replacement filters will need to be replaced every six months or six hundred gallons.

Note: Not to be confused with the larger Max Flow Filters shown above.

AQ-5200R Replacement Filter

The AQ-5200R replacement filter is the replacement option for the 2-Stage Aquasana Under Sink Filtration system (AQ-5200).

With the same excellent filtering capabilities as the other models, this package includes only two filters.

Aquasana Claryum® 2-Stage Filter Replacements

Get These Replaement Filters For The AQ-5200 Aquasana Under Sink Water Filter System – Click Here Now

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Comparison Chart

Although fairly similar, each filtration system and replacement option offer unique features and flow rates.

Filter2 Stage3 Stage3 stage – Max Flow
Gallons before Filter Change500 Gallons600 Gallons800 Gallons
Required Water Pressure20-80 PSI20-80 PSI20-80 PSI
Gallons Per Minute.5 Gallons per minute.5 Gallons per minute.72 Gallons per minute
Chrome, Brushed Nickel, or Oiled Bronze3 faucet options3 faucet options3 faucet options
Contaminants Reduced777777
Pre-Filter to Reduce CloggingNoYesYes

Pros & Cons

Every Claryum® filter comes with a warranty to ensure customer satisfaction. Ensuring that the filters do not leak, proper installation is necessary. There are detailed instructions and even a video included in every filter purchase.

Having fresh, clean, and healthy water is vital to your family’s health. Unfiltered water poses a serious health risk, especially for those with diminished immune systems.


The Aquasana Under Sink Filtration system offers additional protection for those who are concerned about the status of their current tap water.

  • Easy Installation
  • Effective at removing 77% of the common contaminants found in tap water
  • Simple filter replacement
  • Indicator when the filter needs changed
  • Optional 2 or 3 stage filtration system
  • Long-lasting filter life


  • May not protect against other harmful pollutants such as fluoride and high levels of arsenic.
  • May affect your kitchen sink water pressure (although slight in most cases)
  • This is not a whole-home system, so other filtration options may be necessary for the shower.
  • You will need to use the included water faucet; other models might not work properly with the Aquasana Under Sink system.

Should You Buy An Aquasana Under Sink Water Filter?

As the saying goes “Better safe than sorry”.

Sure you can ignore the quality of your drinking and bathing water, but the price of trying to fix a health issue caused by bad water could be enormous.

Did you notice that buying the 3-stage Max flow filter system was cheaper per gallon of water used than the other options?

That means that getting the best Aquasana under sink water filter is actually cheaper, over time, than the lower priced systems.

Also, the lead free faucets are a necessity to protect your health, that other brands don’t offer.

Aquasana Claryum® 3-Stage under sink water filter

Choose The Faucet Color You Like Most – Click Here Now For The Best One

Also available at Amazon 

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Aquasana Under Sink Water Filter: Best 2 & 3 Stage Max Flow?
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Aquasana Under Sink Water Filter: Best 2 & 3 Stage Max Flow?
If your water tastes like chlorine, smells like rotting eggs, and looks like crap - any of the 3 Aquasana under sink water filter systems are best buys.
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Full Stride Health
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