Best Under Sink Water Filters For The Money – Reviews 2018
Imagine getting filtered drinking water- that’s 100% clean, free of contaminants, with a fresh and improved taste- instantly when you turn on your faucet?
This is precisely what an under sink water filter does for you- saving you the time and hassle associated with pitcher filters.
Their convenience overrides other types of filters… and this explains their skyrocketing demand by homeowners all over.
BUT…what’s the best under sink water filter for your home?
In the complete, unbiased under sink water filter buying guide below, I’ll show you how to find the right filter for your sink (with a small budget) from the countless models on the market today…
What is an Under Sink Water Filter?
As the word implies, this is a type of filter that you simply install under your sink (you connect to the water line under your sink) to provide you with instant filtered water.
And as you’d expect, it does a great job at removing ALL the contaminants and germs in your water. Some models even employ a multiple stage filtering process for the ultimate results!
The fact that you install it right under your sink means that it remains out of sight (this is a good one given that these devices aren’t so appealing to the eye). Besides, such a location would save you significant counter space in your kitchen.
Unlike the other types of filters, this model is cheap to operate and doesn’t requires minimal maintenance. As I was going through the best undercounter water filters on the market, I learned that most of these systems could efficiently run for long (up to 5 years!) before replacement.
Something else that puts the filter above other types of water filters is the fact that it delivers a high water flow rate through your faucet, ensuring you get the right amount of clean water at all times.
Although this filter might cost you a little bit more than the countertop, faucet, and pitcher filters, it’ll truly give you the real bang for your buck in the long run.
In other words, they’re long-lasting, require little maintenance and running costs, and they’ll supply enough water to meet your home water usage needs.
Let me take you straight to my list of the 15 most popular under sink water filter reviews on the market today…
Our Best Under Sink Water Filter Picks:
1. Woder 10K-GenII Ultra High Capacity Direct Connect Water Filtration System Review:
Opening our list of the low cost under sink water filter reviews is the Woder 10K-GenII. Homeowners love this water filter recommend due to the filtering effectiveness it comes with.
The manufacturer claims that it reduces up to 99.99% of contaminants in your water (including chlorine, heavy metals, bad odors and tastes). And its NSF/ANSI 42 standards certification acts as sufficient proof.
Its simplicity has also won the hearts of many homeowners. This is especially true when you look at how easy it is to install- it takes you a couple of minutes to set it up and start enjoying 99.99% filtered water.
Moreover, it works on up to 10,000 gallons of water (equivalent to 3years lifespan) without requiring any maintenance. What makes it even more convenient is the fact that it doesn’t interfere with the healthy minerals in your home water, assuring you of healthy, filtered water.
At such a low price, I couldn’t expect this filter to deliver such a high level of efficiency. Nevertheless, it surpasses my expectation, and I highly recommend you to give it a try today.
It’ll filter your water for up to 3months with no maintenance. The money back guarantee will give you peace of mind if you have doubts about this product.
2. Filtrete Advanced Under Sink Quick Change Water Filtration System Review:
The Filtrete Advanced Under Sink water filter also allows you to enjoy healthy drinking water without breaking the bank. It does an outstanding job at removing microbial cysts, chlorine odor and taste, soil, sand, sediment, and rust. It also comes with NSF seal which means it works as the manufacturer claims.
Just like the previous model, this filter is effortless to install. You’ll complete the process in less than 30 minutes on your own, with the help of the Easy DIY Install it comes with.
Note that the unit connects to your existing bath or kitchen faucet- making the installation even more straightforward. Once installed, the filter will smoothly serve you for six good months before replacement.
The exact dimensions of this unit are: 7.1'' H x 14.5'' W x 4.3'' D, which means it’ll fit most of the under sink spaces. However, I recommend you to take measurements of your sink first to clear any fitting doubts.
That this model doesn’t last for long is quite acceptable, given its crazily low price than other models that last for the same period.
3. Woder 10K Ultra High Capacity Direct Connect Water Filtration System Review:
Also manufactured by Woder, this filtration system also comes fully dedicated to making your life healthier and better. It removes up to 99.9% of contaminants present in your home water- which include lead, chlorine, chromium, bad tastes and odors, mercury, volatile organic compounds, and turbidity. The final result is safe, crisp, and great tasting water flowing out of your kitchen faucet!
Something pleasing about this particular package is that it comes with all the installation materials included, with screw and clip among them, making the installation process much simpler than in most of the models out there.
Despite its reasonable cost, this model will also last for up to 3 years of efficiently filtering up to 10,000 gallons of your home water.
Made in the USA, the unit is designed using all the NSF-approved materials to make it one of the highest quality models on the market today. Like the other Woder, it also comes with a money back guarantee- making it a risk-free investment for you.
4. APEC Top Tier 5-Stage Ultra Safe Reverse Osmosis Drinking Water Filter System Review:
The APEC Top Tier 5-Stage system will save you the time, money, and hassle that comes with buying the expensive bottled water while making your life safer and healthier with contaminant-free water.
It efficiently combats up to 99% water impurities through a 5-stage filtration process- including arsenic, lead, fluoride, chlorine, bacteria, virus, heavy metal, and over 1000 other contaminants.
What separates this reasonable price model from its rivals is its supreme quality…arising from the fact that it’s made and assembled in the USA using the highest quality materials that guarantee your health and safety.
Measuring 11” x 11” x 15”, this system perfectly fits in most kitchen cabinets. Installing it is a breeze, as the box comes with all the installation materials and no extra lock clips are needed.
Above all, the manufacture of this system is WQA certified to guarantee you a trouble-free, noiseless system that grants you many, many years of pure drinking water. The 1-year satisfaction guarantee offered by the manufacturer acts as a proof of the manufacturer’s confidence in their product quality and performance.
5. APEC WFS-1000 Super Capacity Premium Quality 3 Stage Under-Sink Water Filter System Review:
Also from Apec, this high-performance water filtration systems provides you with clean, filtered water at extremely affordable cost. It employs a 3-stage filtration process, along with the super capacity filters, to ensure maximum removal of all the impurities residing in your water.
Like all the other top-rated filters, it doesn’t remove healthy minerals from your water, making it healthy for consumption.
The unit is designed and assembled in the USA with the highest-quality materials to guarantee your safety and health. These materials include a 10% lead-free chrome faucet and FDA-certified JG food-grade tubing that ensures you drink contamination-free water.
It’s also important to note that the filters integrated into this system are long-lasting and will serve you for up to 12 months with no maintenance required.
If you’re looking for an under sink filter system that gives you the real value for your money, I suggest that you invest in this Apec system. Its 3-stage water filtration technology efficiently removes all the contaminants in your water, unlike most units that use a single stage only.
The one-year satisfaction guarantee should take away any fears you might be having regarding this product.
6. Aquasana AQ-5300.55 3-Stage Under Sink Water Filter System Review:
Aquasana is one of the trusted names in the water treatment industry. Their many years of experience in the industry enables them to come up with top-quality, high-performance water treatment equipment that focuses on making your life healthier and better. One such product is the under sink water filter system- the Aquasana AQ-5300.55 model.
Being a high-performance model, this system utilizes a 3-stage water filtration process to remove up to 99% of the 68 impurities found in water, assuring you of instant supply of healthier water for drinking and other uses at all times. Moreover, it has undergone NSF 42, 53 + 401, and P473 to confirm its effectiveness at doing its intended job.
Similar to most water filters on this list, this Aquasana comes with an above average filter capacity of 600 gallons, which equates to an acceptable 6 months of filter lifespan.
Installing, replacing, and mainlining the unit is also extremely easy. This is especially true for the replacement part that involves an easy twist on/off design.
7. Hansing 13K Ultra High Capacity Under Sink Water Filter System Review:
Hansing 13K Ultra High Capacity Under Sink Water Filter is another excellent example of simplified water filter that does a remarkable job at combating all the contaminants and undesirable elements found in your home water at insanely low prices. Its compact size enables it to fit under all sink cabinets easily.
The materials used to construct the carbon block that comes with this filter are NSF and ANSI approved, ensuring they don’t contaminate your water further. What’s more, the carbon granules don’t fall into the water, as in the other units, preventing further contamination of your water while ensuring no blocking which might end up affecting your water pressure (and flow rate).
With the system installed under your sink, you can rest assured that you’re consuming water that’s 99.5% free of chlorine, 99.9% free of lead, 99% free of mercury and cadmium, 97.6% free of chromium, and 92.1% free of arsenic. Apparently, this is safe for your domestic use, fish tank use, and for watering your favorite plants.
8. Culligan US-EZ-1 EZ-Change Undersink Drinking Water Filtration System Review:
For the homeowners experiencing harder economic times, this is the ideal filer for you. When put on the under sink water filters comparison table, this model portrays excellent features that match those of the higher priced models. Not to forget the great fits it puts up against the water contaminants to supply you with pure, healthy, and great tasting water.
It further goes against your expectations by offering you a way higher filtration capacity than other models that fall in its price range. That is, it gives you a capacity as high as 3000 gallons of water, which translates to 12 months of constant pure water supply.
Keep in mind that this filter maintains a high flow rate for your water- 0.5 gpm at 60 psi- taking it a step higher against most units on the market today.
Installing and replacing the filter cartridges is extremely easy, thanks to the twist-on, twist-off mechanism it comes with. As a bonus, the package comes with an RC-EZ-1 Level 1 replacement filter cartridge.
All the installation materials, including full instructions, are also included in the box for easy installation.
9. CuZn UC-200 Under Counter Water Filter Review:
Our best undercounter water filters list couldn’t get any better, thanks to the CuZn UC-200 Under Counter Water Filter. Unlike all the water filters we’ve discussed on this list, this particular model provides you with an insanely high water filtering capacity of up to 50,000 gallons. In other words, you’ll enjoy up to 5 years of uninterrupted, pure water at your sink!
To show its prowess at combating water impurities, this unique filter utilizes a 3-stage filtration process that involves micro-sediment membrane, DF-55, and Acid Washed Coconut Shell Carbon (NSF certified). Surprisingly, it does not strip your water off the vital minerals, meaning it retains all its health benefits after filtration.
The best part about this unit is that it works with your current sink faucet, making it extremely easy to install. For added convenience, this water filter comes with bacteriostatic properties- meaning it doesn’t encourage bacteria and mold growth for the 5 years it lives under your sink.
10. Culligan US-600A Undersink Drinking Water Filtration System Review:
The Culligan US-600A is also an excellent choice for homeowners who are on a tight budget due to its pocket-friendly price. Nevertheless, it also works tirelessly to supply you with healthy, cleaner water for drinking and cooking.
The D-20A filter cartridge that comes integrated into the system has a high reputation for reducing chlorine levels and removing unpleasant taste and odor.
Even with such a low price, this system still gives you up to 1,000 gallons water filtering capacity…meaning it can last for up to 12 months before replacing it. The system bears the NSF/ANSI 42 standard certification seals, which proves its ability to purify your home drinking water.
Installing this system under your sink is the easiest part, since it works with your existing sink faucet. Furthermore, all the installation materials are included in the box, making the process even easier.
Replacing the filter is also extremely easy. Note that the system is compatible with a wide range of filter cartridges, like the D-10A, D-20A, D-30A and D-40A.
11. Aquasana AQ-5300+.56 3-Stage Max Flow Under Sink Water Filter Review:
Aquasana is back with another high-quality (but reasonably priced) under sink filter, the Aquasana AQ-5300+.56. Labelled as the best performing water filter by the manufacturer, this model utilizes the unique Claryum filtration technology to only block the harmful, undesired contaminants in your water without interfering with the beneficial minerals. This ensures you enjoy healthy, great tasting water in your home.
Just like its cousins from Aquasana, this model also reduces up to 98% of the 68 contaminants found in your domestic water by taking it through 3 filtering stages, qualifying it to rank among the best under sink water purifier choices on the market today.
What’s more, it boasts an NSF seal that means that it obeys all the set standards for water filters. Don’t forget that it supplies you with instant water at a 44% faster than its competitors.
Adding to the system’s convenience is the Bluetooth connectivity for easy tracking of the filter. Needless to mention, this is a unique feature you’ll not find in most of the filters out there. Each set of the filters that come with this system guarantee you of an above average water filtering capacity of 800 gallons.
12. American Plumber WLCS-1000 Under-Sink Water Filter System Review:
The American Plumber WLCS-1000 is also a top-rated water filtration system designed for fitting under the sink. It enjoys extensive usage in many homes today due to its dedication and commitment to supplying you with cleaner, great-tasting water at the comfort of your tap.
This model works like all the other filtration systems I’ve featured on this list- reducing all the chemicals, heavy metals, chlorine taste and odor, cysts, unpleasant smell and taste, and all the other impurities present in your water. It has also undergone NSF tests to confirm its effectiveness. And this is evident from the NSF/ANSI seal it comes with.
Amazingly, it features a filter life monitor that outputs lights and sounds to alter when the time is ripe to replace the filter cartridge and continue enjoying the filter services.
This makes it a convenient, easy to use model for you. Though it comes with its own dedicated faucet, installing it is still easy as long you follow the provided list of instructions.
13. Watts WP500313 2-Stage Undercounter Lead, Cyst & VOC Reducing Drinking Water System Review:
Most filters only focus on reducing the chlorine odor and taste in your water. But this isn’t the case for the Watts WP500313 filter system as it also comes with a specially formulated filter that excellently removes a wide range of harmful microbes, like cryptosporidia, Entamoeba, Giardia, and Toxoplasma, as well as other chemicals and contaminants- giving your cleaner and healthier drinking water.
Besides, it has been independently tested to confirm its contaminants removal capabilities, and it comes with NSF seal to prove the same. The filter will smoothly filter a total of 600 gallons before requiring replacement.
Made in the USA, this water filtration for kitchen sink is also extremely easy to install. However, it comes with its own faucet, meaning the installation might take a bit longer. Nevertheless, you can do it on your own.
The exact measurements of the whole system are 6'' H x 14'' W x 6'' D- enabling it to fit a wide range of undercounter spaces easily.
14. Aquasana AQ-5300R 3-Stage Under Sink Water Filter Replacement Cartridges Review:
If you’re looking for a replacement cartridge for your Aquasana filtration system, this is your part. In addition to the AQ-5300R, these cartridges can also be used with these Aquasana models- AQ-5300.56, AQ-5300.55, and AQ-5300.62.
The filters employ Ultra-Delicious – Claryum filtration technology to easily remove up to 99% of 68 impurities found in water, while retaining the beneficial minerals to ensure you remain with healthy water for drinking and cooking.
The fact that the system is fully NSF certified means that it lives to its promise of supplying you with healthy water.
Replacing these cartridges is extremely easy, as they come with the twist-on, twist-off mechanism. You can do the replacement on your own. Remember that using genuine Aquasana replacement cartridges is highly recommended by the manufacturer for maximum contaminants removal.
15. 3M Aqua-Pure Under Sink Water Filtration System Review:
Signaling the end of our top-quality under sink water filter reviews is the3M Aqua-Pure system. For those who might not know, 3M has been in the industry for 50plus years, and their products have a reputation for addressing your water issues as per your needs and expectations. That said, we don’t expect anything less for this under sink filter model.
Integrated with a specially formulated, high adsorption AC (activated carbon), this unit actively attracts and traps all the unwanted impurities in your water, including unpleasant chlorine taste and water, ensuring you have clean and clear water for consumption at your home. With a filter capacity of up to 2,000 gallons, this system will see you through months of healthier and better life.
With all the mounting bracket and other installation tools included, setting up this system takes you only a few minutes. The process becomes much easier given the fact that it connects to the existing kitchen or bath faucet. Likewise, replacing the cartridges is a breeze.
Under Sink Water Filter Buying Guide
Though all under sink water filters are meant for installation under your sink to filter drinking water, we can’t deny the fact that they come with different working mechanisms, sets of features, designs, prices, etc.
And that calls for extra care when choosing the best under sink water filter that matches your water filtering needs and expectations.
Below are the key factors to follow to give you the right filter for your needs:
Water Flow Rate
The first thing you’d want to look in any under sink water filter is its water flow rate. You don’t want to buy a model that takes hours to fill a glass of water.
During the water filtering process, the water filter usually limits the water flow. Some models tend to restrict the water flow to a higher degree than the others. So, you’d want to check the water flow rate of your preferred model before buying it to ensure it generates a generous amount of water that matches your home water usage needs.
The primary reason why you’re buying a water filter is to reduce contaminants and other undesired elements in your water.
That said, you can’t spend on a system you’re not sure of its effectiveness (trust me; the effectiveness varies from model to model). Look for a unit that utilizes carbon media that effectively blocks chlorine taste and smell from your drinking water.
Besides, ensure it takes your water through multiple filtration stages to remove more and more impurities.
The more the stages, the better the results.
Another tell-tale sign of a highly effective system is NFS or WQS certification seal (discussed below).
Ease of Installation and Cartridge Replacement
The good thing about the installation of these types of filters is that you don’t need to spend your money to a hire a professional to do the installation.
You can do this on your own, provided you follow the manufacturer instructions. Along these lines, you should look for an easy to install model. Otherwise, you might end up damaging your new investment as you try to fix it.
In my opinion, a model that attaches directly in-line and uses your sink faucet is much easier to install compared that come with their own faucets or require use of a new faucet.
Likewise, ensure that the filter cartridge is easy to replace.
Having gone through my reviews for the top-rated under sink water filters above, I’m pretty sure you’ve noted that they come with varying filter lifespans.
A good number of them require you to replace the filter after around 6 months. While this is acceptable, you’ll also discover that some filters can efficiently work for up to 3 or 5 years before replacement.
I’d suggest that you go for the models whose cartridges last longer as they’re usually made with top-quality components so they’ll efficiently filter your water home and save you the maintenance cost.
Don’t forget to check for these two key certifications in the water filter you want to buy- NFS and WQA.
An underwater filter that features either or both certification seals means that it has been tested and proved to meet the set standards of water filtering effectiveness. In other words, they’ll remove all the contaminants in your water to precisely the same level the manufacturer claims.
Does the model you plan to buy bear any of these certifications?
Despite the fact that these filters are meant for under sink installation, not all of them will perfectly fit under your sink. They come in different sizes and designs.
Its, therefore, important to have the dimensions of your sink at hand before going for shopping. Comparing these sizes will help you get the best-fitting filter for your sink.
This will keep off last minute frustrations and disappointments.
Considering that you’re buying a mechanical device that’s prone to breaking down or failing at times, you should also ensure it comes with a warranty.
This will give you a peace of mind as you’ll know what to do in case it starts misbehaving. You can contact the manufacturer for a repair, replacement, or refund.
Go for models that come with a warranty of one year or more. This is sufficient period to uncover any defects in your under sink filter system.
Last, but not least, look for a filtering unit that lies in your budget. This will help narrow down your choices to a few models, making the selection process even easier.
These filters come in different price ranges. You can find low-cost models as well as expensive models. It all depends on your price.
However, don’t let the price be the determinant factor of the quality and effectiveness of your preferred water filter. Check all the features it comes with to see if they’re worth the money.
How Under Sink Water Filtration System Works?
Because you’re looking for the best under sink water filter, I just figured out that you’d also want to know how it works. So, I’ve prepared a quick guide for you below…
Before we get into details, it’s important to understand that under sink water filtration units can be further divided into two major categories:
Let’s get an overview of how each of them works:
Simple Under Sink Water Filter
This is the most common type in most homes nowadays due to its ease of installation and use. To start using it, you ought to connect it such that all the cold water supply to your sink faucet passes through the filter. It doesn’t use a separate faucet to output the filtered water, so it relies on your sink faucet.
Keep in mind that this system connects to the cold water line only, meaning the hot water remains unfiltered. Thus, it provides you with two faucets on your sink- one for filtered water and the other one for unfiltered water.
Conventional Under Sink Water Filter
This is the oldest form of undersink water filters. It allows you to divert the water in your main cold water line to the filter using a connection (usually a short plastic pipe). Once filtered, the water is output through a different faucet that you need to mount on your sink.
This means that only the water that comes through the separate faucet is filtered. And the cold and hot water coming out via the regular faucet remains unfiltered.
Despite different operation/installation methods, it’s important to note that both models utilize similar water filtering techniques to block contaminants from reaching you.
The most common water filtering technique used by most filters is the activated carbon (AC) media that effectively pulls and traps all the harmful chemicals in your water via adsorption process.
AC removes most of the common water impurities- like chlorine, pesticides, and industrial solvents. Sadly, it can’t remove microbes, heavy metals, and water hardness.
For this reason, you’ll note that you filter works by passing your water through several filtration stages in addition to the AC media. This helps remove additional impurities that the AC couldn’t cope with.
Additional water filtration methods used by these systems for complete filtration include ion exchange, distillation, and reverse osmosis.
Frequently Asked Questions
1. After how long should I replace my under sink water filter cartridge?
Different systems come with varying durations of replacement, so there’s no set time for replacing your filter’s cartridges. Most of them, however, require replacement after around 6 months. Some need replacement after 3-5 years.
2. Can you install an under sink water filtration system on your own?
Yes, you can install the system on your own. You don’t need to hire a professional or a plumber to do the job for you. The set of installation instructions shipped alongside the filter makes the process even simpler.
3. Does under sink water filter soften water as well?
The primary job of the filtration system is to filter your water. The manufacturers claim that these systems do not interfere with healthy minerals in the water, like magnesium, potassium, calcium, etc. Apparently, these metals are responsible for hard water, meaning the system doesn’t harden your water.
4. How much does an under sink filter cost?
The cost of an under sink water filters varies depending on the effectiveness, manufacturer, and features. In general, the price ranges from $100 to $1000+.
5. Does the filtration system require any maintenance?
You only need to do to your unit to keep it running smoothly is replacing its filters. Considering that this is done once in a while, it’s safe to say that an under sink water filtration system doesn’t require a lot of maintenance.
6. What’s the difference between under sink and countertop water filtration systems?
The key differences between the two models are explained below:
Under sink water filter
Countertop water filter
Installed under the sink/out of sight so they save you lots of space
Installed on your countertop space/ can ruin your kitchen appearance/design
Excellent water filtering rates
Takes longer to filter the same amount of water as the under sink model
A bit challenging to install; especially the models that come with a separate faucet
Easy to install; some don't even require any installation
Larger in size; some might not fit under your sink
Smaller in size, so they won’t consume much space
7. How should I replace my system filters?
If you’re thinking of replacing your system filters after months or years of use, let the steps below guide you through:
It doesn’t matter where you get your home water from- whether it’s from the municipal or a well- a great under sink water filter will effectively remove all the harmful chemicals, heavy metals, contaminants, and germs that would otherwise reach your faucet.
Having read my comprehensive buying guide for this filter in this post, I can assure you 100% that you’ll have an easy time picking the best under sink water filter that matches your home water filtering needs at a small budget.
Also, you can easily find the right filter for your home right now by choosing from my list of the 15 most popular under sink water filter reviews and start enjoying instant, clean and great tasting water.