Under Sink Water Filter Reviews Consumer Reports

There was a time when people run behind the Reverse Osmosis Systems


Now the innovative Under sink water filter system has replaced it

The reason is it is an optimum system that eliminates the wastage of water.

In this read, I will talk about the features and buying guidelines of these filter systems.

Let’s check out why it is a reliable way to get fresh and pure water for your family.


Here’s 3 products we picked out through amazon you would be interested in depending on your budget…

APEC WFS-1000 Super Capacity Premium Quality...
Feed Water Pressure: 20-85 psi

Best Under Sink Water Filter Reviews (Updated List)

I will discuss the most updated under sink water filter that is available easily at your designated stores easily.

#6 APEC WFS-1000 3 Stage under Sink Water Filter

Price at Amazon!

Features at a glance
  • This filtration is made, designed, and assembled in the USA.
  • The pressure of water is 20-85 psi
  • The unit includes Lead-Free chrome faucet and is FDA Certified
  • A one year guarantee backs the unit
  • The filter removes chemicals, taste, and odors from the water.
This under sink water filtration system by APEC WFS is one of the most popular and reliable filtration systems. Same like the iSpring system, it also features a 3-stage process to eliminate almost all the contaminants from your household water. In this way, you can rest assured that you will get clean and pure water for your use. Not only this, but it comes with a high-quality faucet, so say goodbye to those poor plastic faucets.
The thing that we loved about this unit is the ease of usage and installation. Unlike some other under sink water filters that have many complicated parts, this unit includes all the tools that you will require for smooth installation. And for your ease of use and convenience, this water filter features pre-drilled holes so you can easily mount it anywhere.
Another thing that you will admire is the water pressure that it provides. Usually, water filters are excellent against containments but don’t offer high water pressure. But that is not the case with this unit. It works great against containments while providing excellent pressure.

What We Like!
  • The unit comes with a reliable and robust faucet.
  • Three stages to purify the water.
  • The unit is simple to use as well as easy to install.
  • You can also mount this water filter on the wall as it features pre-drilled holes.
What We Didn’t Like!
  • The unit is effective against normal containments but not for heavy metals like copper.

#5 Filtrete Advanced Under Sink Water Filtration System

Price at Amazon!

Features at a glance
  • In this unit, there is no separate faucet, so you connect it to your existing faucet
  • Simple installation in only 20 minutes with a 6-month filter life
  • It offers non-drop water flow
  • NSF certified water filtration system
  • It reduces water containments up to 99.3%

This Filtered Advance under sink water filter system is the budgeted option on this list. The Filtrete water filtering system is affordable than others but not less in quality. The unit efficiently removes contaminants from the water.
One of the major benefits of this filtration system after the price is that it doesn’t contain any additional faucet for the filtered water. You can connect this system directly to your water line, and all the water flows through the line will be clean.
Installation is simple. According to the consumer reports of under sink water filters, you easily install the unit without any special tools by yourself. Users stated that it will only take about 20 minutes for the installation. It can filter up to 10,000 gallons of water. This is enough for six months for small families.
Things that we like

What We Like!
  • The filtration of this system is excellent. It will remove up to 99.99% of the sediments in your water.
  • Simple and effortless installation
  • You can connect it to your existing faucet
  • NSF certified water filter system
What We Didn’t Like!
  • The unit doesn’t last 6 months in some cases. This happens when your household water contains large or heavy containments.

#4 Doulton W9330958 SuperCarb Under Sink Water Filter

Price at Amazon!

Features at a glance
  • This Under Sink Filter System comes with a Filter Candle and plastic housing
  • Easy installation
  • It features four different stages of filtration
  • The pack contains all the part required for the installation
This is another efficient under sink filter that can provide clean and crisp water. The Doulton W9330958 Supercarb features a cartridge filter to get rid of several contaminants from your household water.
The cartridge filter has four stages; hence it is effective against all types of pollutants. The first stage includes passing the water through a carbon filter. In this stage, most containments will be removed, such as parasitic cysts and any odors as well.
The second stage of the filter features antibacterial properties. The third filter is effective against chlorine, and all remaining tastes and particles. The fourth and the last of this water filter works against all types of heavy metals such as iron and copper. Unlike others, the unit is also suitable if your water contains any of these heavy elements.
The installation is a DIY, and the unit comes with all the necessary hardware required for the installation.
Things that we like

What We Like!
  • This unit has a sturdy housing and a thick tube.
  • The unit is durable than others on the market.
  • It has four different stages to filter out the water.
  • The system is effective against heavy metals.
What We Didn’t Like!
  • Some users stated that installation is time-consuming.

#3 Aquasana AQ-5300.55 3-Stage Under Sink Water Filter

Price at Amazon!

Features at a glance
  • It will eliminate up to 99% and leave the healthy minerals in the water
  • It comes with all parts required for smooth Installation – No professional required
  • The unit has High Flow Rate
  • The filter will work for up to 6 months
  • Capacity is excellent with 600 gallons
The most economical water filtration system currently available in the market
This Aquasana features an elegant metal faucet that’s entirely lead-free. It allows you to select from chrome, nickel, or bronze faucet to match with your kitchen decor. Not only this, but it also comes with different filters, faucet, and parts.
This Aquasana under sink water filtration system is highly efficient. It effectively works against almost all types of water containments such as herbicides, heavy metals, chlorine, pesticides, and VOCs.
One of the most prominent features of this filter is its twist-off design. When replacing this water filter, just twist it off and put the new one. It will only take about 5 minutes, so that’s a big plus.
With this water filtration system, you will get pure water without any additives and zero waste. You will be glad to know that no water is wasted during the process. Lastly, it is the only system that features Claryum filtration technology. In simple words, it removes all the harmful containments from your water but keeps the beneficial minerals such as potassium.

What We Like!
  • The unit will notify you when it is time for a replacement.
  • The most stylish faucet in the market.
  • It features a twist-off design, so replacing the filter is a breeze.
What We Didn’t Like!
  • The O-rings of this filter are not reliable.

#2 AO Smith 2-Stage under Sink Clean Water Faucet Filter – NSF Certified

Price at Amazon!

Features at a glance
  • The unit will remove 99% of 77 Contaminants
  • The system is NSF/ANSI certified
  • You can connect the system through a faucet that is included.
  • This under sink water filtration system comes with all parts required for smooth installation.
  • No water is wasted during the filtration process.
  • Filter lasts for up to 6 months or 500 Gallons.
The A.O. Smith’s two-stage under sink water filtration system is 77 ANS/NSF certified filtration system. The system is compact so that it won’t take much space in your kitchen. The filtration capacity is impressive up to 500 gallons of water for up to 6 months and with a 0.5 GPM flow.
This AO smith under the sink water filtration system does an excellent job of eliminating nasty chemicals present in your household water. Apart from chlorine, this unit can remove all types of impurities, such as lead, mercury, fluoride, and other containments that are 1 micron in size.
The installation is a little bit complicated, especially if you are a non-technical person. You will need a two, three, or four-hole sink to install the faucet that comes with this unit. So, if you are going with this unit, we will advise you to go for the professional installation.

What We Like!
  • The unit comes with a replaceable filter, so you will not need any replacement for up to 6 months.
  • It effectively reduces impurities up to 99% from your water.
  • It eliminates containments from your water while offering consistent water flow.
What We Didn’t Like!
  • The installation is complicated.

#1 iSpring US31 3-stage Under Sink Water Filtration System

Price at Amazon!

Features at a glance
  • The flow rate of this unit is 1GPM.
  • It comes with stylish brushed nickel metal faucet and transparent 1st stage housing.
  • Due to the transparent housing, you can quickly inspect it anytime.
  • The unit is simple to install; maintenance is also on a lower side.
  • It features dual carbon filters and sediment filters to block and remove impurities from the water.
  • The filter will work for up to 6 to 12 months.
So, here we will talk about the best under sink filters, and at once spot, we have an excellent filtration system by iSpring. This 3-stage under sink water filter system comes with a 10-inch sediment filter and two carbon filters. The unit is effective for all the larger containments except for iron.
The unit works efficiently against all the water containments that are larger than 5-micron. The unit also includes an 11.25 inches tall faucet, so plan accordingly. The unit will eliminate almost all common water containments such as chlorine, pesticides, and herbicides. Apart from it, this under sink water filter system also provides you with odorless water.
The installation process is simple, and like many other filtration systems, you can perform the installation by yourself. The pack also contains a key that you will need to change the filter and a water dispenser. BY reviewing the under sink water filter reviews and consumer reports, we found that you should place the filters in an upright position instead of a horizontal position.

What We Like!
  • It comes with a nickel faucet.
  • DIY and straightforward installation without any special tools
  • It includes three filtration stages to remove containments.
  • You can also use an existing faucet with this system.
What We Didn’t Like!
  • Flow rate is only 1 GPM
  • Not removes Iron from the water

Buying Guide for Under Sink Water Filter

The primary purpose of the under-sink filter system to filter the water. However, there are things that you must pay attention to when buying a filter, and these factors are:

Factors to look for in an under Sink Water Filter

Water Pressure

When it comes to under sink water filters or any other water filtration system, the first thing that you should look out for is the pressure of water and if you are thinking why here is the answer. Nothing can be more irritating than waiting for a long time holding a bottle just to get filled. So, check out for the water pressure first before anything else.
Usually, simple under sink water filters have better water pressure than conventional water filters. However, according to some consumer reports, if the pressure is too much, the water will spend less time in the filtration system, so some contaminants will not be removed from the water.

Filtering Capacity

Some water filters are effective against some specific types of contaminants, whereas some filters have good overall filtering capacity but not suitable to use against specific types of water pollutants. For this reason, we will recommend you to use a home water quality testing kit before going for a water filter. The testing kit will help you in finding out which types of contaminants are present in your household water. And then you should buy the filter that is efficient in eliminating that particular containment from your household water.

Ease of Installation

Another vital factor that you must check out for is the ease of installation and filter change. This becomes extremely important if you are about to use a filter for the very first time, or you are not a technical person. If the system is too difficult to install, it might get damaged during the installation process. Another reason is that no one likes to spend that much on hiring a professional to do the job.
Usually, the under sink water filtration systems are a DIY kind of project, and you will not need an expert for the task. However, in a few cases, professional installation is recommended by the manufacturers.
Similarly, replacing the water filters is simple in almost all the water filters. And you can do it yourself in a few minutes. There are some water filters that are tough to replace. So keep that in mind as well when buying the under sink water filters.

Cartridge Longevity

When it comes to cartridges, most of them work in the same way, and you will have to replace some in 6 months, whereas some cartridges need replacement in 5 years. The cartridges that last longer are well constructed with high-quality components. And these are more efficient than the others.
However, if a cartridge is advertised as long-lasting, let’s say for five years, it might not work effectively until five years. The reason for this deficiency is the quality of your household water. Furthermore, the cartridge is tested with municipal water. But the water that comes into your house flows through the miles-long pipes, and it contains some other containments that were not present during the testing of cartridges. In this way, the cartridge will last less than advertised.

Under-Sink or Countertop filters – Which one you buy?

Both these systems use activated carbon filters to clean the water, and it depends on your personal preference which one you should use. Both have their pros and cons that you must consider before buying any.
Under Sink Systems
Plus Points

  • Out of sight water filters – These will not affect your kitchen’s design
  • No countertop space – You can install these in a cabinet under the sink.
  •  Filtration Rate is excellent than countertop water filtering systems.

Things to consider

  • These filters are larger than the countertop ones.
  • Some units are tough to install.

Countertop Systems
Plus Points

  • These units are much smaller than under sink filters.
  • Simple to install than under-sink models.

Things to consider

  • The filtration rate is not good enough and is much slower than the under-sink models.
  • These filters can affect the look of your kitchen counter and design.

FAQ’s about Under Sink Water Filter

What is the best under water sink filter in 2020?

  • APEC WFS-1000 3 Stage under Sink Water Filter
  • Filtrete Advanced Under Sink Water Filtration System
  • Doulton W9330958 SuperCarb Under Sink Water Filter
  • Aquasana AQ-5300.55 3-Stage Under Sink Water Filter
  •  iSpring US31 3-stage Under Sink Water Filtration System

What is an Under-Sink Water Filter?

Under sink water filter system is a simple filtration device. It collects water from the under-sink water pipe and sends it to the filter. And when water is purified, the device provides the clean water to the user through its faucet.
No water is wasted during the filtration proves as it happens in a reverse osmosis system. An under-sink water filtration system will not purify the main water supply. It will only purify the water coming from a particular tube or kitchen pipe.
Now that you have understood what actually under sink water filter is let’s move on to individual product reviews followed by a comprehensive buying guide on the subject matter. And we are confident that till the end you will have all the details to make an informed decision about which is the best under sink water filter for your needs.

How to install the Under Sink Water Filter?

Usually, the installation of the Under-sink filtration system is simple. Here is how you do it

  • First, remove the tubing located under the sink.
  • Mark the location
  • Now make all the plumbing connections
  • Connect the water filter to the sink
  • Screw the water filter on the location
  • Test the new water filter

Always follow the product manual and instructions when installing the unit. You can also get help from the video tutorials or contact customer support.

When to Change the Water Filter Cartridge?

There is no straightforward reply to this question. Some need a replacement every six months, whereas some can last for up to 5 years without any replacement. This also depends heavily on the quality of the water coming into your house.
To be precise, we will advise you to follow the company’s instructions regarding the replacement and change of filter and cartridges.

How to Clean & Replace Cartridges In Under Sink Water Filter System?

This also varies according to the product model, but there are some general steps you should take into account when changing the filters.

  • Turn off the supply of water.
  • Drain all the water present in the system through the faucet
  •  Open the casing. You can use a screwdriver for this purpose.
  • Remove the existing filter.
  •  Clean the housing
  • Replace the old filter with a new one
  • Close and screw up the casing
  • Turn the water supply on and check for leaks.
  • Change all the filters at the same time

How under Sink Water Filters Work?

There are two types of under sink water filters. The first one is simple under sink filter, and the second is conventional under sink filter. Below we will briefly explain each type of filter.

Simple under Sink Filter

Although the system is referred to as the simple one it’s working is extremely complex. The term “simple” refers to its installation rather than how it works.

In the simple under sink water filter, all the cold water flows through the filter. This system doesn’t have any separate faucet. It will provide the water from your regular faucet. And as this filter is connected to the cold water line, it cannot filter the hot water. The main benefit of this filtration system is the ease of use.

Simple under Sink Filters Pros

  • Quite economical and affordable
  • No need for additional faucet
  •  No modifications to the sink will be required
  • Simple to install

Simple under Sink Filters Cons

In this system, more water is purified, so you’ll have to replace the filters regularly.

Conventional Under Sink System

In this filtration system, the cold water pipe is diverted to the filtration system through a connection. Usually, the connection includes a short plastic tube. After the filtration, the water flows to the faucet mounted on the sink. The cold and hot water present in the regular faucet will not be filtered. This system sends the water to a filter first and then to a faucet.

Conventional Under Sink Filters Pros

  • You will not have to change the filters regularly as only part of the water is filtered
  •  Low flow rate allows for better removal of the containments

Conventional Under Sink Filters Cons

  • You will need an additional faucet with this filtration system.
  • You might need to perform some drilling work to install this system.
  • Reduced flow rate.

Benefits of Under Sink Water Filters?

An under sink water filter will benefit you in the following ways:

Removes Bad Odors and Tastes

An under sink water filters uses an activated carbon filter. These filters are quite efficient in eliminating the bad smells and tastes from the water.

Sediment Removal

Some components of the filter are specially made to eliminate the sediments. Some cartridges also feature pleated polypropylene or a spun polypropylene for this purpose, and the activated carbon filter will also help.

No Chlorine

As under the sink, water filter system has activated carbon filter, you will get chlorine-free water. Apart from removing large containments and chemicals from the water, there are second carbon filters to remove chlorine and other such chemicals.

Less Arsenic and Fluoride

The under sink water filtering systems feature Alumina filter to eliminate the fluoride from the household water. However, the fluoride is completely removed from the water. Furthermore, due to the Alumina filter, the arsenic is completely removed from the water.

Nitrite/Nitrate Reduction

Nitrates and nitrites are harmful, especially for children and old aged people. The Anion resin cartridge in an under sink water filter eliminates these from the water.

Less Limescale

The cation resin present in the cartridge eliminates calcium and magnesium up to 90% present in the water. The cat ion also helps to reduce the limescale building up under your sink.

Bacterial And Microorganism Removal

The filter cartridge used by the under sink filters also helps in removing bacteria. This is also effective against microorganisms like Cryptosporidium and Giardia.

Final Verdict

Under sink water filters systems are much more efficient in eliminating the contaminants from water than previously used reverse osmosis systems. Another significant difference between under sink water filter systems and reverse osmosis systems is that the under sink water filter systems will not produce any wastewater. That’s why people prefer these systems in present times.

Now, you know that the primary function of under sink water filter systems is to remove or block all the impurities that are present in your water.
The under sink water filter reviews and consumer reports also stated that these devices are suitable to use with well water. Yes! It will remove and block most of the impurities present in your well water from reaching your tap.

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