Best Under Sink Water Filters Reviews 2021

It’s the 21st century and the invention of under sink water filters has taken a great turn for the better. These devices are now more efficient than they used to be, offering customers a higher value for their resources. In previous years and models, only certain contaminants could be eliminated from the water by the filter; however, nowadays, these filters do away with all kinds of dirt and debris, with help from their reverse osmosis systems, which are a modern addition to their construction. If you are in the market for such a filter,  the below list of the ten best under sink water filters has been curated for your perusal and are ideal for your home and workplace. Pretty much any of these top 10 filters will prove to be a worthy investment in the long run for you and your family, as they’re all made by trusted brands and manufacturers.


Home Master TMAFC Filter Review


  • Removes up to 98$ of chemicals
  • All-in-one modular assembly
  • Long-lasting & easy change filters

iSpring RCC7AK Drinking Water Filter System


  • 6-stage
  • Superb taste
  • High capacity
  • Under sink reverse osmosis

APEC Drinking Water Filter System


  • Top tier
  • 5-stage
  • Ultra-safe reverse osmosis
  • Assembled in the USA

Best Under Sink Water Filters 2020 FAQ

What is an Under-Sink Water Filter?

An under sink water filter is a product that is stored beneath your sink. It takes water from your under sink water pipe and transfers it to a plastic tube for purification. Depending on the model you purchase, there are different stages of the purification procedure. Your water filter then uses its faucet to deliver the water back to you, once the water is pure enough for consumption.

The operations of every under sink water filter is on-demand, thus, there’s no case of water wastage. What’s more, these filters work with the reverse osmosis system, with only a single sink at a time. The filter can also be used separate from your standard kitchen faucets, still providing you with the clean filtered water you desire.

How Under Sink Water Filters Work?

The operation of an under sink water filter is very simple. It comes in two major types, namely the ‘simple under sink filter’ and the ‘conventional under sink filter’. These two units operate differently to bring the filtered water you deserve. The simple sink filter operates with your regular faucet, while the conventional filter system needs your water diverted via a connection. These two filters have different compartments where purification occurs before the water is delivered to you. What’s more, the water filters can make use of cartridge filters, carbon filtration systems and the reverse osmosis process. And depending on the combinations employed, a certain number and type of contaminants can be done away with.

Under Sink Water Filter Installation – How do I Install an Under Sink Water Filter?

Undercounter Water filters are usually easy to install. Self-installation is possible, thanks to installation-ready delivery. With most models, you will usually have the choice to opt for the installation variant with an additional tap, in a 3-way valve, or using the existing valve.

Top Ten Best Under Sink Water Filters Reviews in 2020

  1.   Home Master TMAFC Water Filter System

Home Master TMAFC Filter Review

Our first product in this review of the best under sink water filter 2019, is also the most efficient from the lot – the Home Master Water Filer System. According to scientists and engineers in the water filtration field, this is one of the most efficient units one can ever purchase. This is because it has been designed with a lot of research and study backing, which ensures its durability and performance. No doubt, the Home Master Water Filter System is a filter unit that can be found underneath your sink.

It uses the reverse osmosis filtration procedure to do away with all water contaminants and debris, which can be harmful to your body after consumption. And if you want to purify your water and also maintain all the minerals required for a healthy body, this will be the ideal filter as the Home Master filter system deals with sediments, heavy metals, chemicals, and other contaminants. Furthermore, this filter doesn’t have to be changed regularly, and also doesn’t require any wrenches.

Included with every purchase of this filter is a Fast Flow RO Kit, which allows your faucet to fill up your cup or container twice as fast as a regular RO system. We believe that this filter system and its five-year limited warranty will offer you the much-needed benefits that come with drinking clean and fresh water.


  • Removes up to 98-percent of chemicals
  • All-in-one modular assembly
  • Long-lasting and easy change filters
  • Included fast flow ro kit
  • Comes with a brushed nickel faucet
  • DIY installation
  • The faucet can be used with the system
  • Low water flow
  • Not very versatile
  • The cartridges have to stay upright


Read full Home Master TMAFC Water Filter System review here

  2.   iSpring RCC7AK Drinking Water Filter System

iSpring RCC7AK Drinking Water Filter SystemHere is another top-rated under sink filtration system. The iSpring RCC7AK 6-Stage Water Filter System is yet another exceptional filtration unit which has taken the market by storm. This is a product that many households make use of, because of its high capacity, friendly design, and affordability. Out of all top Rated filter systems, it is considered the most economical on Amazon and on other trusted online reviews.

The iSpring filter system is designed with a six-stage procedure, meant to do away with sediments, chemicals, and other drinking water contaminants which can be detrimental to everyone’s health and this product ensures that your water is cleansed and left with a superb taste that isn’t common with competing for filtration systems. What’s more, the taste is made possible via the filter’s alkaline remineralization process, which neutralizes that water to its natural ph.

You will love drinking water cleansed by the iSpring filter as it is a great reverse osmosis unit that has been designed by only the best scientists and engineers in the field. Overall, this filter is very user-friendly and simple to install and can be placed directly under your sink, or used without any threading pipes. What’s more, this water filter system is an industry-leading unit that merges quality and quantity flawlessly.


  • 6-stage
  • Superb taste
  • High capacity
  • Under sink reverse osmosis
  • Good faucet
  • Better than the cheap plastic models
  • 3 separate filters
  • The faucet has one finish
  • Comes with a stainless steel finish


Read Full iSpring RCC7AK Reverse Osmosis Filter Review Here

  3.   APEC Drinking Filter System for Tap and Well Water

APEC Drinking Water Filter SystemThe APEC company was set up with the sole aim of bringing quality to all customers worldwide. They have managed to achieve this via their manufacturing of state of the art filtration units. Their latest unit which is a reverse osmosis filtration system was made to guarantee both water safety and good health. To achieve this, it is made with modern technology meant to eradicate and dispose of up to 99% of all contaminants found in water. These contaminants include chlorine, arsenic, heavy metals and over a thousand other chemicals.

One drinking session with the APEC Drinking Water Filer System will leave you wishing for more. it is true that there are a whole lot of water filter options on the market, but our editorial team is confident in the fact that there’s none like this unit from APEC. This is a supreme quality filter system which has been designed after years of research. What’s more, the design process is followed keenly by premium engineering and the best assembly line in the entire USA.

The filter system also features a 50-gallon capacity, which allows it to filter a lot of water within a day and it is suitable for the treatment of both tap water and well water, thanks to its long-lasting filter design. We believe that with great care, this filter system will be usable for up to 20 years without any issues.


  • Top tier
  • 5-stage
  • Ultra-safe reverse osmosis
  • Assembled in the USA
  • Solid housing and thick tubing.
  • More durable than many others
  • Quality water output
  • Needs some parts
  • Not all parts are included
  • A little expensive


Read Full APEC Top Tier 5-Stage Water Filter Review Here

  4.   Express Water Reverse Osmosis Water Filtration System

Express Water Reverse Osmosis Water Filtration SystemThe Express Water Filtration System is a reverse osmosis system that comes with an NSF certification to guarantee your safety and health. it is made by a leading manufacturer in the water filtration industry thus, it comes highly trusted by many professionals such as scientists and health personnel. Furthermore, this filtration system also comes highly recommended for all homes and workplaces because it delivers fresh and clean water for extended periods. Not only this; it also uses a filtration process that has been cut down into five major stages, after which your water will be safe for consumption.

Also beneficial is the instructions this express water system comes with, which will help make its installation a breeze. It is extremely user-friendly which allows a wide variety of individuals to make a purchase. The best part about this filter is how much dirt, debris, and chemicals it can remove. A single-use of this filter disposes of all lead, nitrates, chlorides and many other bacteria from your water.

Additionally, this removal process leaves your water looking and tasting fresher than fresh. No doubt, drinking water that tastes like the heavens is what everyone deserves, thus Express Water seeks to provide that for everyone. For sure, you will love their filter system thanks to its one-year warranty and guaranteed quality. Overall, this is a product that helps you love water more than you could ever imagine.


  • Nsf certified
  • 5 stage ro water purifier
  • With faucet and tank
  • Plus 4 replacement filters
  • Long-lasting filters
  • Can be tiresome and irritating
  • Filters can be changed every 3 years
  • Slows water pressure
  • Pricey
  • Reduced water quality over time

  5.   AQUA CREST 3US-PF01 Under Sink Water Filter

AQUA CREST 3US-PF01 Under Sink Water FilterMeet the Aqua Crest Under Sink Water Filter. This is another highly efficient unit designed, assembled and manufactured by the best professionals in the business. This unit is to be installed underneath your sink for better performance and works well with all advanced filtrate designs models that enhance its performance making it more versatile in use.

The Aqua Crest filter reduces the amount of chlorine in your water by using its premium coconut carbon block system. This is also great for the removal of heavy metals, odors, rust and sediment pollution from your water. The housing of this filter is constructed from goof grade plastic which means that no contaminant will be allowed to find its way back into your water after it has been eradicated.

As for maintenance, the Aqua Crest filter should be properly cleaned once every six months. The maintenance will include a change of the filter, as, by this time, it is expected to have cleaned up to 2000 gallons of water. And since the Aqua Crest team wants to provide you with the best drinking experience, they have put together this independent water filtering brand, which delivers a stable water flow and efficient water filtering without a drop in water pressure.


  • Compatible with Filtrete
  • Water filter (Pack of 2)
  • High-efficiency filtration
  • Safe material
  • Filter change notification
  • Highly versatile
  • Modern design
  • Poor O-rings
  • Rings will fail after 3 years of use
  • Design can be improved

  6.   Aquasana Under Sink Water Filter

Aquasana Under Sink Water FilterThe Aquasana Under Sink Filter is another great product for cleaning your water and drinking healthier water all day long which is a superb filtration system that is known by many professionals to transform ordinary tap water into a liquid fit for the heavens. We have explored several filters but only a few come close to this one from Aquasana when it comes to affordability.

The Aquasana filter delivers extraordinary water at your doorstep, regardless of the main source. It works with all water sources, and is installed underneath your sink for easy usage – the installation process is made easy thanks to the step by step instructions from the manufacturers. Even better – when in operation, this filter removes up to 99% of all contaminants from your water, leaving you with fresh, tasty liquid for quenching your thirst.

We are recommending this water filter because of its high efficiency, user-friendliness, and durability. What’s more, it can be used without any maintenance for a very long time, before it will demand a filter change. So, feel confident to opt for this economically durable filter for your household and enjoy the best taste of water on the planet.


  • AQ-5300+.62
  • 3-Stage max flow
  • Full system certified to NSF standards
  • Instant access to healthy water
  • The filtration system is very effective
  • Cheap price
  • Remove up to 99.99% of the sediments
  • Requires regular maintenance
  • Filter lifespan can reduce fast
  • No spare parts

  7.   Ecosoft Under Sink Water Purifier Filtration System

Ecosoft Under Sink Water Purifier Filtration System Ecosoft – a brand that has been understanding the needs of its customers since its inception. This is no ordinary brand. We love that this company takes into consideration all the suggestions made by their customers, as this tells us that they care more about their joy than the profits made. The Ecosoft company launched this Under Sink Water System some years back and it has become a highly sought after unit.

This is a simple filter unit, designed to be as classic as possible, and allows you to have a taste of nature in the comfort of your home by removing all contaminants and debris from your water source. This results in fresh-tasting water which soothes your aching throat while keeping you refreshed.

We also love this filter system because it uses the reverse osmosis system which increases the health quality of your water. Their filtration system is divided into three major stages, where each stage is very vital for your safety and health. No doubt, there’s no better filter on the market, and we know you’re well aware of that fact.


  • Kitchen Faucet and
  • Extra Filter Cartridge
  • Blue
  • 3 Stage
  • Comes with a brushed nickel faucet
  • DIY installation
  • effectively remove sediments
  • Low water flow
  • Not very versatile
  • Cartridges have to stay upright

  8.   Whirlpool WHAMBS5 Under Sink Water Filtration System

Whirlpool WHAMBS5 Under Sink Water Filtration System If there is one company that has been around for the longest time, it is Whirlpool. They are a leading manufacturer in household appliances and have seen generations of families make use of their durable products. In this article, we’re focusing on their Whirlpool Whambss Filtration System, a unit we have found to be terrific in use and easy on the pocket.

This filter system for your water is set up beneath your sink and comes with a chrome faucet; what’s more, it is known to be the most durable filtration system you will ever purchase.  No doubt, the Whirlpool filter is also an eco-friendly unit which is designed in a manner which prevents it from wasting water while it is being purified.

What’s more, this system comes with a one-month filter set with a chrome faucet that is dedicated to filtered water, a manual for installation, push-in connectors and a color-coded tubing system. Make use of this premium filter system and have the safest water to give your family.


  • Chrome faucet
  • Extra-long life
  • Easy to replace 3-Stage Ultra
  • Ease filter cartridges
  • Long-lasting filters
  • Easy to use and set up
  • The filtration system is very effective
  • Water seeks into the dispenser, which might cause corrosion
  • Filters can be a little pricey
  • Needs a thorough setup to prevent cloudy water

  9.   Culligan US Ez-Change Water Filters

Culligan US Ez-Change Water FiltersAnother well-known brand is Culligan and they have their Culligan EZ-Charge Water Filter in our list of recommendations. There’s a lot to be said about this unit, and we’ll discuss them accordingly. First and foremost, this is a very special filter system that is designed, assembled and distributed by a very trustworthy company.

The Culligan system uses four stages of filtration to give you the best water for consumption. It is a single unit attached to the bottom of your kitchen sink for easy access and performance and it makes use of the unit you simply need to twist it on or off depending on your needs.

No doubt, the Culligan under sink water filter is one great item every home can purchase. It is worth the investment as it is extremely durable and can be used to filter 500 gallons before any maintenance session. What’s more, this ez charge unit from Culligan comes with all the tubing and hardware pre-installed thus, you only need to attach it to your sink.


  • Under sink Kit
  • Level 4
  • Single unit
  • Installation hardware is included
  • Simple installation
  • Several instructional tutorials
  • Has 3 filters
  • A Little large
  • Needs some extra parts for set up
  • Slows water pressure

  10.   Brondell Undercounter Water Filtration System

Brondell Undercounter Water Filtration SystemBrondell brings us to the end of this recommendations list, with their Brondell Undercounter Water Filtration System. We love this filter and all its three stages of water cleansing. Using this for your water is amazing because it takes away every contaminant and leaves a sweet taste that many love.

The Brindell filter for water takes your liquid through a sediment filter, ore-carbon filter, and a carbon block filter. It features a Twist & Seal system which allows you to change the filter being used at a specific time. And to prevent any leakages, this filter system uses a double O-ring unit on all their filters.

What’s more, with a 600-gallon capacity, this water filter delivers up to 12 months of endless performance, which is high above the average for regular water filters. Trust this Gold-seal certified unit to keep you healthy and free from harmful chemicals, which can be detrimental to your health.


  • Designer chrome faucet
  • Quick change filter
  • WQA gold seal-certified
  • Three-Stage
  • Long-lasting filters
  • The filtration system is very effective
  • Remove up to 96.6% of the odors
  • Poor O-rings
  • Slows water pressure
  • Needs some parts


Best Under Sink Water Filters Buying Guide

When in search of under sink water filters, we all go looking for the same thing. Under sink water filters are in high demand because everybody wants to consume filtered water. To satisfy the high demand, several companies have come up with different versions of the filter system, and they all come with different features and rates

A water filter not only gives your kitchen a special touch, but it is also a purchase that benefits your health and the environment alike. However, before you opt for any water filter model you come across, you should inform yourself about the features to look out for as well as the various devices on the market. What’s more, there are some design considerations you need to be mindful of, which are vital to the functioning of your filter. Ignoring these features can cost you a lot of resources and bring about a lot of regrets.

This is why we have created the below-buying guide to further assist with the features and benefits when installing an under sink water filter in your kitchen and why buying a filter system makes sense.

Features to Look Out for When Buying an Under Sink Water Filter

– Water Pressure

The first point you will need to be considerate of is water pressure. This is a very essential point when it comes to under sink filters. Having good water pressure is vital, as it avoids you waiting too long for a single glass of water to fill. As opposed to the conventional filters, simple underwater filters tend to have better water pressure system. They also offer increased pressure and even though this is terrific, it also means that water hardly stays in your filter. The less time water spends in your filter, the more likely some contaminants are to pass through the filter unchecked. And if you live in an area with highly contaminated water, this might be an issue.

– Filtering Capacity

The second most essential feature we advise that you take a look at is the filtering capacity. The intended product you wish to purchase should be highly efficient at doing away with contaminants. Most often, this is highly dependent on the filter cartridge used. There are some filters that do more than others, which is mostly because they have a high performing cartridge.

Additionally, there are other models that work well with overall filtering but aren’t designed to identify and remove a specific type of contaminant. To make the best choice, it is best to use a home water quality testing kit, to show you which contaminants the filter can deal with.

– Ease Of Installation And Filter Change

How simple and easy is it to install the filter you want to purchase? This will go a long way to affect your final decision. The product you opt for must be simple to install and also very fast when changing filters. What’s more, the installation should be easy to help prevent any damages during the process. If your filter is tough to install, you’ll end up spending hours with customer services, or employing other skilled personnel which will demand the use of resources. The easier the installation, the more time and money you save.

– Cartridge Longevity

Many conventional water filters demand a change every six months. There are, however, some models that can be used for as long as five years without the need to change a filter. According to experts, filters that can be used longer are those that have been built better. This is because they feature cartridges made from high-quality components which make them more efficient than their conventional counterparts. Furthermore, cartridges are usually tested with municipal quality water thus, the advertised lifespan time might not be their actual lifespan. The reason is that there are different water sources, and the quality of water being filtered can affect the quality and lifespan of your filter.

Under-Sink Vs Countertop Water Filters

Under sink water filter systems make use of activated carbon filters, just like the countertop water filters. They are similar in some aspects and yet different in others. The major features of the under sink filter systems include its ability to be out of sight, and not interfere with the theme of your kitchen. Their installation under your sink also means that your countertop is left free for other things. As compared to their mates, countertop filters, these units have a high filtration rate. There are some disadvantages to this unit, like any other product on the market.

The under-sink filter also comes in sixes that may be larger than the countertop models. This will result in more storage space needed underneath your sink. Also, they tend to be tougher to install, when compared to the countertop models which don’t need any installation.

On the other hand, the countertop systems are smaller in size, and this means they won’t demand a lot of storage space. They also don’t require any installation this they’re easier to use right from your purchase. Their disadvantages, however, include that they have a slow filtration rate, which causes them to take longer to filter the same amount of water as an under-sink filter. Again, countertop filters can destroy the beauty of your kitchen design, if you don’t find a complementing colour or shape.

Who Should Buy an Under-Sink Water Filter?

Under-sink water filters are meant for everybody who wishes to benefit from cleaner water. They are ideal for people with basic plumbing skills, who don’t have a lot of space available. If you’re tired of accumulating water bottles, then the under sink filter is meant for you, too. It helps you save money and saves your health from the unhealthy features of plastics. Finally, these units are well suited for all those who simply wish to enjoy tasty water. Water that is sweeter than tap water and more favourable than well water.

Advantages and Disadvantages of Under-Sink Water Filters

One may be wondering what the advantages of having an under sink filter will offer, besides having clean water to drink. The truth is that these products offer us many more benefits than we can imagine. Despite all their positive traits, using these products also come with some demerits thus, we have compiled some advantages and disadvantages to help you make your final decision.


– Improved taste

Using an under-sink filter helps keep the ph of your water balance, and this, in turn, affects the taste of your water. The removal of all contaminants in your water helps purify water in your kitchen thoroughly, removing odors and odd tastes that might make your drinking experience uncomfortable.

– Environmentally friendly

Most of these filter models used in homes are sustainable in design. The under sink water filter reduces your purchase of plastic bottled water and allows you to reuse your old plastic bottles within your home. This reduces the amount of plastic used around the world, reducing our waste and improving our overall quality of life.

– Storage Requirements

Because your under sink cabinet remains closed for most of the time, you won’t see your filter often. This also means that when making a purchase you won’t have to find a large space for storage, as you would do when purchasing a house filtering system.

– Easy installation

There are minimum capability requirements when it comes to the installation of an under sink water filter. Even though this doesn’t come naturally, these skills can be learned via online videos or by installation instructions and tutorials offered by manufacturers of your preferred model.

– Affordability

Every under sink filter, like many other conventional filters, will require some additional expense for its maintenance. this, however, doesn’t erase the fact that making a purchase of this product is a breeze thanks to their low cost.

– Variety

Depending on the number and kind of contaminant you want to do away with, there are varying options of this filter for all users.  You get to choose between having a conventional water filter and an advanced device that will cater to all your filtration needs.


– Separate tap

One feature we don’t appreciate the under sink water filter is that to deliver clean water, it requires its own faucet. With this, you have two major options to choose from. The first is to install a three-way tap which is then connected to your cold and hot water plumbs or to install a standard filter tap.

– Single Outlet

The bad thing about these filters is that they work for only one faucet in your home. It works with a single sink, thus you will need to purchase more filtering units for other parts of your home, or even better, invest in a water filter system which can be used for your entire house.

– Installation

There are some models of under sink water systems which tends to require expert assistance when installing, such models can cause you to spend more than you bargained, and they also may cost more when it’s time for maintenance.

Different Types of Under Sink Water Filters

Though there are many models of the under sink water filter available in the market today, there are only two major types of this filter. These are the simple and conventional under sink filters. Each unit is unique in a certain way thus, they have been discussed and their benefits duly stated. Depending on your needs, you will choose one over the other.

– Simple Under Sink Filter

The first type of under sink water filters we’ll be discussing are the simple under sink filters. These units are referred to as simple and yet, their method of operation is extremely complex. The simplicity, however, is identified in how they’re installed, and not their mode of operation. All your cold water supply should be diverted through your water filter when it is being installed. The process also means that you will not require a separate faucet for the delivery of water after it’s purified as it’ll be delivered to your regular faucet instead. What’s more, connecting the filter to your cold water supply will also mean that your hot water will not be filtered.

We love the simple under sink filter because it is very user-friendly, and also because it doesn’t demand the use of many faucets.

– Conventional Under Sink System

The next and last type is the conventional under sink water filter. This unit is termed as ‘conventional’ because it encompasses how water filters were designed back in the day. For this system, installation and usage requirements differ slightly. Users need a connection to divert the water in the main cold water pipe to the system, in order for their water to be filtered efficiently.

What’s more, there is usually a faucet included with your purchase, and this should be mounted on your sink to receive water after its filtered. Also, all the water in your regular faucet, be it hot or cold will remain unfiltered, with filtered water coming in through the separate faucet only. The conventional water filer is always under pressure, but it requires the user to buy two faucet holes or drill a new sink on the countertop.

The Benefits of Under Sink Water Filters

Under sink water filters are a great accessory to have in your kitchen. They are known globally to enhance health and also deliver the best quality of water to users within the shortest possible time. We discuss some of their numerous benefits below.

– Affordability

Having this unit in your home is more economical when compared to having a whole filtration system for your home. With the under sink filter, you spend less money both for installation and regular maintenance, which can occur every five to six years depending on the model you opt for. Filters installed beneath sinks are made with high-quality materials but with cost-efficient construction methods which also enhance durability.

– Great tasting water

The second most beneficial element of the under sink water filter is its ability to deliver great ph neutral-tasting water to the user. The filtration process allows all contaminants and odours to leave your water, making it more enjoyable for you and your family. There are some models that feature a mineralization system, which helps in giving your water a delicious taste that cannot be found with other filtration systems.

– Clean water for everything.

The water you get from your filter system isn’t only meant for drinking. This is the water you can use for washing and cooking too. The level of cleanliness is adequate and safe enough for you to make use of during your culinary sessions. Water filtered with the under-sink systems are known to be free from a wide range of contaminants, and this helps prevent the spread of diseases among you and your family.

The removal of these contaminants is done via reverse osmosis and carbon filter systems, which are modern introductions to the filtration sector. What’s more, these systems also work with cartridge filters, which go a long way to dispose of all harmful chemicals present in your water.

– Durability

Under sink water filters last longer than regular water filters. Depending on the model you opt for, you can make use of the filter for many years, before the need to replace the filter candles will arise. Having such a model allows you to save money for many other tasks, which can be beneficial to both you and your family.

The durability of these water filters is in their construction and the technologies employed to keep them operational. Those that make use of the cartridge filters are known to last very long, and also requires minimal maintenance.