If you’ve been paying attention to the news, you know that in the last few years, water safety scandals have gone way up, with communities reporting lead, arsenic, or hormones in the water. Because of this, many people have made it a priority to find the best under sink water filter to protect themselves and their families from potential contamination.

No matter where you live, when harmful contaminants are found in drinking water, it’s time to get proactive about water purity. Your city’s water treatment plan may not be enough, and a water filter could be the last line of defense between your family and harmful contaminants.

Below we have reviewed 10 of the highest quality and easy to install under the sink water filters available on the market today (we update our list at least twice a year).

Recommended Product

recommended under sink filter

This is the Woder 10K-Gen3 direct connect water filtration system, and it is our top recommendation. It filters water like a champ, and here is why:

  • Flow rate 2GPM @65 psig
  • No plumbing required
  • Lasts up to 10,000 gallons (or up to 3 years)
  • Guaranteed to eliminate 99.9% of contaminants, while leaving all essential minerals.
  • Priced to sell!
Stop compromising on drinking water taste and quality today!

Check Price & Reviews

In addition to Woder, we have reviewed and rated 9 more water filtration systems below. Our aim is to inform you as best as we can by eliminating products that we know are a waste of money. This list is regularly updated, so you can safely bookmark this page for the future.

Under Sink Water Filters Comparison
  • 2 GPM
  • Lasts up to 10,000 gallons
  • 1-year limited warranty
  • 6 GPM
  • Lasts up to 625 gallons
  • 1-year limited warranty
  • 2 GPM
  • 1-year limited warranty
  • 100% Lead-Free chrome faucet
  • 0.25 GPM
  • 1-year limited warranty
  • 3 stage carbon filter
  • Up to 1 GPM
  • Lasts up to 2,000 gallons
  • 3-stage filtration
  • Up to 2 GPM
  • Lasts up to 50,000 gallons
  • 1-year limited warranty
  • Up to 0.5 GPM
  • Lasts up to 800 gallons
  • 3-stage filtration
  • Up to 1 GPM
  • 1-stage filtration
  • 1-year limited warranty
  • up to 1.5 GPM
  • Lasts up to 1,600 gallons
  • 1-stage filtration
  • up to 2.25 GPM
  • Lasts up to 2,000 gallons
  • 1-stage filtration

Best Under Sink Water Filter Reviews

1. Woder 10K-Gen3 Ultra High Capacity Water Filter

best under sink water filter

  • Weight: 2.5 pounds
  • Dimensions: 3 x 3 x 15 inches
  • Material: Non-BPA or Vynal Chloride Plastic
  • Flow Rate: 2 GPM
  • Capacity: 10,000 Gallons

With the Woder 10k-Gen3 Ultra High Capacity Water Filter, you can enjoy tap water that is just as pure and healthy as spring water! This under-sink water filter eliminates 99.9% of lead and chlorine found in tap water, as well as a variety of other harmful contaminants and chemicals while leaving in all healthy minerals.

In addition, it has been tested by the American National Standards Institute to give you complete confidence in its ability to filter tap water.

The Woder 10K filter is perfect for newbies to water filtration, as it does not require any plumbing or plumbing experience. Woder provides “direct connect” hoses with their product which are measured to fit the specifications of standard water valves and kitchen sinks throughout the USA.

The only thing you have to do is install the filter directly into the existing cold water valve and faucet stem under your sink, and in five to ten minutes you can get started using your new under-sink water filter! It’s perfect for those who want to spend less time working and more time hydrating some delicious filtered water!

While many other similar products filter out healthy minerals, this filter will remove contaminants while still allowing essential minerals to make their way into the water. Ultimately, the water coming through your faucet will be free of sediment and bad tastes and odors.

Replacement filters are high in demand and supply and are easy to find online. To replace them, you just need to look at the little instructions book that is included with the Woder system.


  • Set up within minutes with “direct connect” hoses.
  • Long-lasting, minimum of 3 years or 8,000 gallons of water.


  • Cannot be used with well water, salt water, or softened water.

2. 3M Aqua-Pure Under Sink Water Filtration System

3M Aqua-Pure Under Sink Water Filtration System

  • Weight: 5 pounds
  • Dimensions: 15.8 x 10.9 x 3.2 inches
  • Material: Plastic
  • Flow Rate: .6 GPM
  • 6,000 gallons of water lifespan

3M has been a leader in filtration technology and innovation, recognized internationally for over 50 years. Their experience speaks volumes, and none speak quite as clearly as the 3M Aqua Pure filter for water system.

3M knows that nothing comes closer to home than the water you drink, and having clean drinking water is not only pleasurable but reassuring, because it allows you the peace of mind that you’re giving your family what they deserve: the best.

This under-sink water filter comes with its own dedicated drinking water faucet, saving you a trip to the department store during the installation. It is also designed to reduce particulate and rust, which helps preserve your pre-existing plumbing and fixtures. The 3M shuts off automatically when the cartridge has been used, making it easy for you to know when to switch them out, and the sanitary twist-off cartridge design means that you can make that change quickly and easily!

It is NSF certified and proven to reduce chlorine tastes and odors, lead, turbidity, and many other contaminants, so you can have more appealing drinking water! The 3M Aqua-Pure Filtration System is effective for use on both chlorinated and non-chlorinated water systems, meaning that no matter where your water is sourced from, this filtration system has you covered!

3M also earns a high rating, because of their advanced carbon block filtration process that aids in the additional reduction of sediment. 


  • NSF Certified to reduce contaminants.
  • Designed with ease of installation in mind.


  • Materials are all plastic.
  • Low flow rate.

3. APEC WFS-1000 3 Stage Under-Sink Water Filter System


  • Weight: 14 pounds
  • Dimensions: 18 x 12 x 10 inches
  • Water pressure: 20-85 psi
  • Feed water temperature: 40-100 degrees Fahrenheit

The APEC WFS-1000 3 Stage Water Filtration System is a must-have for anyone looking for sediment free filtered water supply at an affordable price. The three premium quality filters which make up this system last over 12 months, and it is guaranteed to remove chemicals, tastes and odors that might contaminate your water, making this essential for busy families and on-the-go professionals.

It looks like a reverse osmosis system, but it is not!

APEC prides themselves on providing long-lasting and dependable water filtration, and when it comes to value, you’d be hard-pressed to find anything that offers you more. Their water filters have super-high longevity and capacity that can treat both tap and well water, so no matter where your water is sourced from, the APEC won’t be slowed down.

The first stage is made of a high-grade polypropylene sediment filter and is meant to remove dust, particles, and rust. The second and third stages consist of a premium extruded carbon block that improves water tastes and odors while removing chlorine. So, you get one carbon filter with each stage.

The APEC WFS-1000 is made from the highest quality materials, comes with its own lead-free chrome faucet and FDA certified JG food tubing, so your water stays clean through the whole process. Because this system has a fast water flow, it does not require a tank. It also doesn’t waste any water in the rinsing process that some filters offer, which means that this product is environmentally friendly.

APEC WFS-1000 filters are easy to replace, and you need not look further than the instructions booklet included in the package.


  • Environmentally friendly in its reduction of water waste.
  • High-quality materials make this last longer and optimize water purity.


  • This system does not remove fluoride and lead.
  • Not the most compact under the counter system.

4. Ecosoft 3 Stage Under Sink Water Filter System

4. Ecosoft 3 Stage Under Sink Water Filter System

  • Weight: 8.4 pounds    
  • Dimensions: 16.5 x 6 x 14.6 inches
  • Materials: 100% BPA Free & European Food Grade Plastic
  • Flow Rate: 0.25 GPM

Ecosoft prides itself on its ability to offer fresh water everywhere! Whether you’re at home, the office, the kitchen, or even in an RV, Ecosoft knows that the need for clean water doesn’t vanish just because you leave your home, so they made sure you can use the Ecosoft filter wherever you need it.

They give you the freshest water you can get by removing bad smells, tastes, lead, chlorine and chloramines, lead, copper aluminum, barium, iron, and other heavy metals.

The Ecosoft 3 Stage Under Sink Water Filter is made from 100% BPA Free & European Food Grade Plastic and equipped with a carbon filter cartridge that enhances purification in an effort to leave as many healthy minerals as possible

The three unique stages of filtration make sure the water coming through the faucet is as pure as possible. The first stage removes dust, sand, and other sediments; the second stage reduces salinity, chlorine, lead, iron, and tannins; and the third stage removes any odors or residual flavors, so you end up with a tasty glass of drinking water!

Ecosoft comes with its own dedicated faucet that is not only easy to use, but it’s easy to install as well. You can mount it under your sink with ease and get your water at the touch of a faucet. No plumbing experience necessary, so this system is perfect for newbies!

Replacement filters were not easy to get a hold of. Maybe we just hit a bad season. Other than that, you don’t need to be a plumber to replace any of the 3 stages. 


  • 100% BPA Free & European Food Grade Plastic make this a high-quality product.
  • Certified by the Water Quality Association & ISO.


  • Does not remove TDS.

5. iSpring US31 3-Stage Under Sink Water Filtration System

iSpring US31 3-Stage Under Sink Water Filtration System

  • Weight: 12.02 pounds
  • Dimensions: 16 x 6 x 16 inches
  • Flow Rate: Up to 1 GPM
  • 2,000 Gallons lifespan
Now you can get your hydration quick and painlessly with the iSpring US31 3-Stage Under Sink Water Filtration system! Brought to you by iSpring, the US31 is a 3-step carbon block filtration system that requires no tank, and boasts the ability to remove sediment, chlorine, organic chemicals (VOCs) and more to give you the odor-free, color-free, and funny taste-free drinking experience you want!

The US31 filtration system was manufactured strictly to comply with FDA standards, and certified against NSF/ANSI standards to ensure water quality, material safety, and structural integrity. iSpring does their homework, and they know that you do too, so they make sure their standards are as high as they need to be to provide you with clean water.

Their dual CTO carbon filter is effective at removing common sediment, arsenic, lead, heavy metals, VOCs and harmful chemicals cloudiness and colors.

In addition to its elegantly beautiful European-style high spout faucet, the iSpring is intended for easy DIY installation and low long-term maintenance, offering lifetime support from iSpring should you run into challenges along the way.

Whether it’s washing fresh produce for dinner or just making sure that your glass of water is clean, the iSpring US31 provides you the peace of mind that you crave.

Each of the 3 stages is easy to replace, so long as you can find a replacement filter. We tried online, and it took us 2 weeks from the day we ordered.

Just to highlight, this is not a reverse osmosis system. 


  • Complies with FDA standards and certified against NSF/ANSI standards.
  • Included dedicated faucet that works great.


  • Does not remove iron or hard water.
  • Customer service was poor when we tried to contact them.

6. CuZn UC-200 Under Counter Water Filter

CuZn UC-200 Under Counter Water Filter

  • Weight: 8 pounds
  • Dimensions: 4.5 x 4.5 x 15 inches
  • Flow Rate: 2 GPM
  • Capacity: Up to 50,000 Gallons

If you’re looking for the top of the line when it comes to water filtration capacity, I have nothing more to say to you than why haven’t you bought the CuZn UC-200 Under Counter Water Filter yet? This filtration system boasts an incredible capacity over its lifetime, offering you 50,000 Gallons worth of water filtration. To give you a rough idea, that lasts on average about five years!

The installation for this product is as simple as can be, connecting directly to your kitchen sink’s cold water line in only a few minutes, and requiring only an adjustable wrench as a tool. If you need help or have nonstandard, their customer support line is always available to help you figure things out!

Once installed, the CuZn UC-200 will get to work purifying your water with its cutting edge 3-stage filtration process, each stage designed to prevent a certain subset of contaminants from making their way through. Unlike other carbon-only filtration systems, this filter has a bacteriostatic filtration system, which means it is not susceptible to the mold or bacterial growth that you might find elsewhere.

If you’re looking for long-lasting and reliable water filtration, there’s no better place to look than the CuZn UC-200.


  • A huge capacity means this filter will last a long time.
  • Bacteriostatic filtration reduces the likelihood of mold or bacterial accumulation.


  • Cannot be used with private well water.

7. Aquasana 3-Stage Under Sink Water Filter

Aquasana 3-Stage Under Sink Water Filter

  • Weight: 6 pounds
  • Dimensions: 12 x 4.2 x 9 inches
  • Material: Metal
  • Flow Rate: 0.5 GPM
  • 800 gallons filter lifespan (about 6 months)

The Aquasana 3-Stage Under Sink Water Filter is a truly superior activated carbon filtration system that can confidently proclaim its ability to remove up to 99% of 77 different contaminants, including mercury, lead, pesticides, pharmaceuticals, and more. Their full system is NSF certified to last for 600 Gallons of purity and will not leach any contaminants back into your water, and wastes no extra water in the process, making it a great choice for your health and the environment!

Each Aquasana AQ 5300 includes a premium dedicated faucet for your water; they even let you choose the best look to match your pre-existing kitchen decor. Choose from brushed nickel, bronze, or chrome. All of these options are 100% metal and 100% lead-free.

The AQ 5300 is also the first activated carbon filter on this list. It has 3 stages and is very capable of removing chlorine, and reducing organic chemicals like pharmaceuticals, herbicides, and pesticides. It is probably one of the best carbon filter based under counter filters available on the market.

This Aquasana filter is a “no plumber required” product which is shipped along with your first set of filters and all parts required for DIY installation! This product also alerts you when it’s time to change filters, so you can take the guesswork out of the equation and maximize the amount of clean water you’re getting for the value.

Not to mention, changing filters is as simple as twisting one-off and twisting another one on; it doesn’t get much simpler than this!

Customer reviews reported troubles with replacement filters. We had no such issues. In fact, it does not take much to replace these filters. You can just consult the instructions booklet included with the unit.


  • Multiple design options for those who want to maintain a sleek kitchen look.
  • Great for the environment, zero water waste.


  • A battery is required and has a limited life span (1500 hours).
  • Customer service was not very responsive.

8. Doulton W9330958 SuperCarb

Doulton W9330958 SuperCarb

  • Weight: 3.25 pounds
  • Dimensions: 3.5 x 3.5 x 12 inches
  • Material: Acetal/polyester, ceramic
  • Flow rate: 1 GPM       

Since its inception in 1826, the fine folks at Doulton Water Filters have gained literally hundreds of years of experience in their mission to provide homes and families with clean and healthy drinking water, and it’s hard to argue with the kind of experience they bring to the table. By using natural ceramic water filters, they improve the look, smell, and taste of tap water, removing contaminants, but leaving healthy minerals behind.

The Doulton W9330958 SuperCarb Under Sink Filtration system is an acetal/polyester in-line system which comes to you complete with everything you need to get your water filtration game where it needs to be.

This includes a Doulton SuperCarb Ceramic Filter Candle, a durable plastic housing, and all the parts required for the installation, so it can connect quickly to your plumbing system. While this product will last a long time on its own, the Ceramic Filter Candle can be scrubbed clean with a brush to extend the life of the product even longer!

This is not the best choice for reducing sediment, chlorine, or other harmful chemicals, as per customer reviews. It is also not rated very high on our list for that reason. It does not tend to improve water taste much, but it is a decent budget buy if you do not want to spend for a filtration system with 3 stages.

The Doulton W9330958 is NSF Certified and ADA Compliant, so you know that the water it purifies for you is contaminant-free and safe to drink. This is also a fantastic value, coming at a slightly lighter price tag than some of the other options on the market.


  • NSF Certified and ADA Compliant.
  • Time-tested filtration techniques.
  • Very compact and space-saving system.


  • General abilities, very few specific contaminants are targeted.
  • Not the best customer service.

9. Frizzlife Under Sink Water Filter

Frizzlife Under Sink Water Filter

  • Weight: 4.52 pounds
  • Dimensions: 13.9 x 5.8 x 5.4 inches
  • Material: PP, carbon compound filter cartridge, stainless steel faucet, copper valve
  • Flow Rate: 1.5 GPM
  • Capacity: 1600 Gallons

Frizzlife’s Under Sink Water Filter is quick to boast about their ability to remove lead from water, and we don’t blame them! With a 99.9% rate of lead removal in their water filtration system, we would boast about it too. This product’s 2-stage advanced water purifier is a unique technology that removes 99.9% of contaminants in your water while leaving behind all the essential minerals that keep your water healthy!

In addition to lead, this filtration system also removes heavy metals, chlorine, chromium 6, mercury, rust, volatile organic compounds, carcinogens, and other contaminants such as turbidity, odors, and bad tastes. Frizzlife is thorough, and it shows!

This is also our second activated carbon filter system on the list. Frizzlife claim 0.5 micron precision that eliminates 99.99% of lead, chlorine, odor, and particles. But, the accuracy of this statement is quite impossible to be tested outside of serious lab conditions. 

In addition to their uncompromised efficiency at filtering contaminants from your drinking water, the Frizzlife Filter also comes with its own dedicated stainless steel faucet that can be installed easily into most sinks.

Their easy design utilizes quick-change twist-in components. This means it takes less than three minutes to do a filter replacement. You can spend less time to switch out your filters and more time enjoying the clean water you get from them!

And with auto shut off, you don’t have to worry about accidentally missing a filter change, and you won’t need to go out of your way to turn it off when you make the change.


  • Easy design for quick filter changes.
  • 9% lead removal rate.


  • Holds no certifications through the NSF.

10. Filtrete Advanced Quick Change Water Filtration System

Filtrete Advanced Quick Change Water Filtration System

  • Weight: 2.8 pounds
  • Dimensions: 4 x 6.8 x 14 inches
  • Flow Rate: 2.25 GPM
  • Capacity: 2000 Gallons

For those of us who are on the hunt for cleaner, great tasting water at your convenience, Filtrete under-sink water filtration systems proudly offers an easy-to-install, no mess filtration system with long lasting replacement filters that can be changed with a simple twist! No more wasting plastic by using multiple bottles of water per day, Filtrete knows that your tap is the best place to start when it comes to contaminant-free water!

The Filtrete Advanced System offers you simplicity: in less than 30 minutes, you can connect the system to your tap (no dedicated extra faucet required) and get you going on clean, filtered water for the next six months. The Filtrete system is NSF certified and reduces microbial cysts, chlorine taste, and odor, sand, soil, silt, rust, and sediment based.

One of the unique features of the Filtrete system is that they offer multiple different options for filters, depending on your specific needs. These filter types include Maximum, Advanced, and Standard options, and they are easily interchangeable if you decide to change your mind about which filter you like the most.

And when it’s time to replace your filter? No problem! Filtrete offers text reminders when you need to change your filter (for those who opt-in).


  • Reminders of when to change filter.
  • Multiple options for filter type.


  • No separate faucet.
  • Takes longer to install.

Two Types of Under Sink Water Filters

If you’re brand new to the world of water filtration, it might help you to know that there are three types of under sink water filters available for you to choose from: Conventional, Simple, and Reverse Osmosis. Even though there are three types, for the purpose of finding the best under sink water filter, we’ll only be focusing on the first two. (Reverse osmosis is a different system altogether, so we won’t be including it here.)

Depending on the set-up of your sink, your skill at plumbing, and the water filtration goals of your household, either of the two under-sink water filter types may be right for you.

Conventional Under-Sink Water Filter

A conventional under-sink water filter is one that attaches to your cold water line, which allows water to pass through the filtration system and out from a completely separate faucet.

The original faucet will still work for unfiltered water in this case, and your hot water line will not be attached to the filtration system. Since an extra faucet is needed for filtered water, a conventional filter might be tricky to install unless you already have an extra hole drilled on your sink or countertop. Otherwise, some additional drilling might be necessary to get the filter installed.

Conventional Under-Sink Filters Pros

  • Because filtered water comes from a separate faucet from unfiltered water, conventional under-sink filters last much longer.
  • A lower flow rate means that water spends more time traveling through the water filter, and therefore comes out with far fewer contaminants.

Conventional Under-Sink Filters Cons

  • If you don’t have one already, you will either need to buy a sink with an extra faucet or get ready to drill a new hole in your sink or countertop.
  • Because this filter attaches to your cold water line, only cold water will come out from the faucet, meaning hot filtered water will not be an option.

Simple Under-Sink Water Filters

While the method a simple under-sink water filter uses is pretty complex, this device is actually named for the simplicity of the installation method. Pay attention, those who are constructionally challenged: if all the talk of drilling holes in the previous example was making you a little bit nervous, a simple under-sink water filter might be the better bet for you.

Once a simple under-sink water filter has been installed in your sink, all the cold water supply gets directed through that filter. There is no extra faucet at play here; your filtered water will come out directly through your regular faucet.

It’s worth noting, however, that this type of filter is still connected to the cold water line, so a simple under-sink water filter will not be able to filter hot water.

Simple Under-Sink Filters Pros

  • There is no additional faucet required during installation, which means that you can save yourself having to drill a hole in your sink or countertop.
  • Because of the lack of complexity in the installation process, simple under-sink water filters are much more inexpensive.

Simple Under-sink Filters Cons

  • More water gets filtered in this process, so the filters will have to be changed more often
  • The water flow in this filter is higher, so water will travel through the filtration system faster and there will be some contaminants that make it through and into your water.

The Benefits of Under Sink Water Filters

under sink water filter installation

We have some scary news; when water comes out of your tap, there’s a big chance that it brings lead, arsenic, hormones, and all kinds of contaminants which put your health and the health of your family at risk.

Here is what a good water filter will protect you from:

  • Bad odors and tastes that leave a sour feeling in your mouth.
  • Sediment, or solid residue that can end up in tap water.
  • Nitrites and nitrates which can pose harm to children and the elderly.
  • Limescale caused by calcium and magnesium.
  • Fluoride, which can weaken your immune system and accelerate aging.
  • Aluminum, which is linked to Alzheimer’s, hyperactivity, learning disabilities, liver disease, and more.
  • Bacteria and Microorganisms.
  • Chlorine
  • Heavy metals
  • Arsenic

Drinking filtered, clean water on a regular basis can have wonderful effects for your overall health as well. It has been linked to nutrient absorption, weight loss, skin hydration, and detoxification. All of these things are wonderful benefits to your health.

Why Get an Under Sink Water Filter

If you don’t have an under sink water filter in your home, the truth of the matter is that you don’t know for sure what is in your water. With any number of contaminants possible, drinking unfiltered water puts your health at risk.

Having an under sink water filter will not only put your mind at ease, but there are so many varied types that no matter what your budget or home needs, you can find one that works for you. Many of the options available are cheap or require little additional modifications in order to have it installed in your home.

Some people, though, decide to opt out of having an under sink water filter for a variety of reasons. For example, under-sink water filters tend to be larger than a countertop system.

Even though they’re out of the way, they may take up valuable storage space under your sink. Additionally, these systems can range in difficulty during the installation process, and some families choose to forgo them in favor of countertop or other filtration systems.

Buyer’s Guide: How to Buy an Under Sink Water Filter

So, you know all the reasons you want to have an under-sink water filter, you know whether a conventional or simple approach is better for you, and you have decided to purchase one! Congratulations, you are one step closer to benefiting your health tremendously! But with so many dozens of options on the market, where are you even supposed to start looking?

Here are some of the most important factors that you should pay special attention to when trying to find the filter that will work best for your home.

What Features to Look for in an Under Sink Water Filter

Water Flow Rate

The water flow rate is the speed at which water makes its way through the filtration system, and it is measured in GPM, or Gallons Per Minute. A higher water flow rate indicates that water moves faster through the system. This means more water for you, but also a higher drain on the device’s filtering capacity.

Additionally, at higher water flow rates, water moves through the filter quickly enough that some contaminants will escape through and make their way into your water. However, this is not the case with lower GPMs which allow water to spend more time in the filter, and therefore come out cleaner; the downside of this is that your water may take a little longer to be filtered out.

Make sure to pay attention to GPM when you’re shopping around!

Filtering Capacity

The filtering capacity is the level of efficiency a filter has when it comes to removing contaminants; another way of looking at it is the lifespan of your filter.

Capacity is measured in gallons, telling you the maximum amount of gallons that can be filtered before the filter will need to be replaced. Capacity can vary widely from filter to filter, and some products will even vary depending on the specific contaminants themselves, with certain models designed for certain contaminants.

If you are concerned about a particular contaminant in your home, it’s recommended that you use a water quality testing kit at home to find out which contaminants are the highest risk to you and look for a filter which targets that specifically.

Ease of Installation

It is true that some under-sink water filters are easier to install than others, and the last thing you want to do is end up with a filter that’s too difficult for you to install properly or one that accidentally breaks as you attempt to install it. Ease of installation is important in this regard; make sure your filter is one whose functionality you understand and can operate.

Remember that models which are easier to install will also be easier to change the filters in as time goes by, so this is important for more than just the first time you install your under-sink water filter.

Contaminant Reduction

As we mentioned earlier in this review, certain filters are designed specifically to be better at preventing certain contaminants from entering your water. They might be highly capable of preventing one contaminant, but less effective at preventing another. Before purchasing an under-sink water filter, make sure to test the water that comes out of your faucet at home so you know which contaminants pose the highest risk for you.

Then, you can look for a filter which targets that specific contaminant and reduces it, maximizing the health benefits for you and your family!


Some under-sink water filters have certification from NSF International (NSF stands for National Sanitation Foundation), which is a nonprofit testing lab. When an under-sink water filter receives NSF Certification, it tells you that this specific filter has been confirmed as capable of removing a certain substance or contaminant.

Again, testing at home is an amazing supplement to this; look for a filter which has NSF Certification in the contaminants that are the biggest threat to your home. (NSF also has some third-party labs which certify products to their standards. These include CSA, UL, and WQA, so you can trust those certification seals as well!)

Cartridge Longevity

If you have experience using a water filtration system of any type in the past, you will know that the filters in these systems need to be changed out every once in a while or risk losing their filtration capabilities.

Some products on the market will need a new filter every couple of months, and others can last multiple years! Take note of how often a specific filter will need to be swapped out before purchasing to make sure that you can stay on top of it and keep your water clean because a dirty filter is no filter at all!

Filter Cost & Lifespan

It’s critically important to know how much replacement filters cost and how long they last. If your under-sink water filter doesn’t need a replacement for five years, but you’ve bought a filter replacement that only lasts six months, then you’ve lost four and a half years of value! When it comes to your budget, you want to know how often you’ll have to buy additional filters. Finding a good balance between cost and lifespan will save you tons of time and money in the long run.

Under Sink Water Filter Installation & Maintenance Guide

Below is a video that demonstrates the best way to install any under counter water filtration system, regardless of the brand. 

Step-By-Step Under Sink Water Filter Installation

Alright, are you ready to be amazed by how easy it is to install your new under sink water filter? Here is the simplest process you could possibly dream of:

  1. Remove the tubing from underneath your sink.
  2. Make a note of the location of your new filter.
  3. Double check that the plumbing connects appropriately.
  4. Connect your new filter to your sink.
  5. If you have one, secure the mounting location of your new filter.
  6. Test the filter to ensure that it’s working properly.
  7. Enjoy contaminant-free water!

When to Change the Water Filter Cartridge

How often should you change your water filter cartridge? Well, this is dependent on the filter that you’re using, and the recommendations for how often to change it are typically listed with the product itself.

For some systems, this change needs to happen every six months, and for others, the filter can run for five years without ever being changed. Some filters even let you know when it’s time to change over!

How to Clean and Maintain Your Under Sink Water Filter

Again, the specifics of cleaning and maintenance when it comes to your under sink water filter will be dependent on the product itself, and it’s always best to follow manufacturer instruction in this regard. However, there are some universal steps that should be taken during the cleaning process.

  1. Turn off your water!
  2. Drain any excess water in the system.
  3. Open up the casing.
  4. Remove the old filters.
  5. Clean out the internal casing.
  6. Insert the new filters.
  7. Close the casing.
  8. Turn on your water to check for leaking!

Make sure that you are careful and diligent about cleaning your water filter! After all, there is no point to having a water filter if it’s not contaminant-free.

Final Words of Caution

Sometimes it can feel like staying healthy requires us to be ever-vigilant and constantly hunting for the next dangerous thing. While water contaminants are another of these looming risks, having a reliable under-sink water filter in your home can allow you to protect yourself from the risk without having to spend every day worrying about it.

Depending on the type of system and specifications, you can easily find an under-sink water filter that suits your specific needs.

So if you’re looking to establish healthy water drinking habits, protect yours and your family’s health from harmful contaminants, or just trying to have tastier water, an under-sink water filter is undoubtedly one of the best long-term purchases you can make.

You can have peace of mind knowing that, regardless of any mistakes or pollution that may occur at your water’s source, you have established a line of defense in your home. And you can enjoy a nice cold glass of clean water while you do it!