Top 10 Best Under Sink Water Filter Reviews For 2019

Water is an essential part of life. And we must always drink sufficient water for proper bodily functions. However, common household water supply might not be as clean as it looks. Though the liquid may look crystal clear, there might be numerous bacteria, pesticides, metal, toxins, etc. And the best way to purify it is by using a best under sink water filter.

Under sink water filters, as the name suggests, are made to install under sink. Most people use them under the kitchen sink as the area needs a maximum water supply. While some prefer to use a filter in the garage or bathrooms.

No matter where you want to install the device, one sure thing is to look for a good quality water filter.

Such units are compact and very efficient. They remain hidden under the sink and works brilliantly. In addition, they supply clean water on demand.

Thus, you do not have to wait for the inner container to fill like many regular RO filters. Many such benefits make under sink water filters worth buying.

Best Under The Sink Water Filter System Comparison Table

FiltersFilter ProcessPrice
iSpring RCC7AK6-Stage Filtration Check Price
Home Master TMAFC7-Stage Filtration Check Price
CuZn UC-2003-Stage Filtration Check Price
Culligan US-EZ-4 EZ4-Stage Filtration Check Price
APEC WFS-10003-Stage Filtration Check Price
Woder 10K-Gen3Direct Connect Check Price
Whirlpool WHER25 (RO)3-Stage RO Check Price
Aquasana 53003-Stage Filtration Check Price
3M Aqua-Pure AP-DWS1000Carbon Block Filtration Check Price
Aquasana AQ-52002-Stage Filtration Check Price

Below are the filter reviews which will surely help you to get the best one for your home.

1. iSpring RCC7AK – Under Sink Reverse Osmosis Drinking Water Filter System

iSpring RCC7AK 6 Stage Under Sink Reverse Osmosis Drinking Water Filter System

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Taste of water matters a lot for many people. And if you are specific about taste then iSpring RCC7AK is for you. Its 6 stages reverse osmosis system filters water as well as balances pH of water. While the first five stages help clear toxins and contaminate, the 6 stage helps to restore healthy minerals. This alkaline remineralization filter also provides a more natural taste that is ideal for picky water drinker.

RCC7AK features a reverse osmosis filter that is capable of removing contaminants down to 0.0001 microns. These tiny organisms are hard to see with the naked eye but are capable enough to make you sick. Therefore, you do not need to worry about such particles with iSpring RCC7AK.

Filters are the heart of any filtration machine. So they must be replaced on time to avoid further problems. And the best thing about iSpring under sink water filter is, you can replace filters by yourself. The replacements are of standard size and are easily available online at factory rate.

It is very much possible that your existing faucet model might not support RCC7AK system. Thanks to iSpring that includes a lead-free, solid brass faucet with brushed nickel finish. This European style high spout faucet is perfect and easy to install in the kitchen. A fine GAC filter present in between alkaline stage and water delivery pipe provides final polishing. As a result, you get a great-tasting bottled-water quality.

Our Observations

Pros:

  • An additional stage of alkaline remineralization restores healthy mineral and balances pH level
  • Three main filers remove the majority of the contaminants
  • Push-connect fittings color-coordinated tubes ease the installation process
  • You can get installation help either through watching a video or by calling the company’s expert support team
  • Price of the unit is not too high, you get a faucet along with water filter under $200
  • The whole system is backed money-back guarantee for a year from the date of purchase

Cons:

  • None that we could find

Key Features:

  • RO system
  • Maximum TDS 750 ppm
  • 6-stage filtration process
  • 75-gallon per day capacity
  • 45-70 PSI incoming water pressure
  • Drain saddle
  • 1-year manufacturer warranty

2. Home Master TMAFC – Best Rated Undersink Reverse Osmosis Water Filter System Review

Home Master TMAFC Artesian Full Contact Undersink Reverse Osmosis Water Filter System

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Slow flow rate is a common problem with many cheap under sink water filters. And nobody likes to wait for long to finish their kitchen activities. But the flow rate is not a problem with Home Master TMAFC under sink reverse osmosis system. Thanks to its fast flow RO kit that doubles the flow from your faucet. Thus, the pot fills faster as compared to other standard models.

In addition to fast filling, Home Master TMAFC uses seven stages of filtration. The powerful catalytic carbon filtration media treats chemical disinfectant chloramine. Therefore, which is very harmful and heavy chemical. However, this might make water little acidic in nature which is also not suitable for our body.

To overcome the problem of acidic taste, TMAFC under the sink water filter balances pH level at two different points. The first remineralization occurs when water travels to a storage tank. And the minerals restore again when it travels through the faucet. This not only benefits our body but also prevent storage tank degradation. Hence, you will not have to bear heavy replacement cost a few years after using the machine.

Changing filters on time is necessary for optimum output. But some models require wrenches and special tools in order to change them. Thanks to easy change filters of Home Master Artesian that eases changing of such parts. Unlike traditional RO system, you will not have to apply brute force or need tools to loosen canister seal. In fact, its modular design and push-in fittings help to change and secure canister within minutes.

Our Observations

Pros:

  • Both filter element and housing are present in a single chamber that is easy to change annually
  • Double flow rate fills the cup twice as fast as compared to traditional systems
  • Seven stages of purification remove up to 99% chemicals, heavy metals, dissolves solids, etc
  • Two pH balance levels make the liquid slightly alkaline and great-tasting
  • The unit includes a non-electric permeate pump that helps to reduce water wastage by up to 80%
  • No need to call plumber or an expert as the installation process is simple to do by yourself

Cons:

  • Instruction on a manual is difficult to understand

Key Features:

  • 2000 ppm max TDS
  • 7-stage filtration
  • Modular filter design
  • 3/8-inch feed adapter
  • Fast flow RO kit
  • 5-year limited warranty

3. CuZn UC-200 Under Counter Water Filter – Made in USA

CuZn UC 200 Under Counter Water Filter Made in USA

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Extremely easy installation of Cuzn UC-200 makes it one of the top-rated under sink water filter on Amazon. It only takes a few minutes to install the unit on your existing cold water line. Just follow two simple steps and you’re ready to drink clean and hygienic water. The only tool you need is an adjustable tightening wrench for proper connections.

On the downside, this under sink water filter only works with cold lines. Therefore, you cannot control the temperature or install the heater with the same line. Also, the unit is not meant to use with well water as it is not capable of removing tiny contaminate particles. It is only suitable to use with municipal water supply, be it for home use or office.

The simple 3-stage filtration process comprises of micro sediment membranes, KDF-55, and coconut shell carbon. These filters help to purify municipal water and make it more healthy to drink. They do not remove minerals completely as small quantities are beneficial to health.

The inner layer of UC-200 under sink water filter is bacteriostatic. Such a layer is not susceptible to mold or bacteria growth. As a result, quality of liquid remains healthy for long period of time as well as it does not smell foul or taste odd.

Our Observations

Pros:

  • Affordable and efficient product for home and office has a municipal water supply
  • Instead of having multiple chambers, it comprises a single chamber only
  • The unit connects directly to your kitchen sink’s cold water line within a few minutes
  • The capacity of the unit is to filter up to 50000 gallons of water
  • No frequent changing of parts as well as provides a longer life cycle
  • You will not have to buy compatible faucet separately

Cons:

  • Not suitable to purify well or hard water
  • Works with cold lines only

Key Features:

  • 3-stage filtration process
  • Micro sediment membranes
  • Easy installation
  • Bacteriostatic interior
  • Acid washed coconut shell
  • KDF-55 filtration media
  • 5-year warranty

4. Culligan US-EZ-4 EZ-Change Under Sink Drinking Water Filtration System with Dedicated Faucet

Culligan US EZ 4 EZ Change Undersink Drinking Water Filtration System with Dedicated Faucet Premium 500 Gallon Filter Included

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It is quite possible that you might not get the desired results with your existing faucet. And it is hard to find a matching faucet both online and at a hardware store. But thanks to Culligan under sink water filter which comes with a dedicated faucet. Stylish design and easy to use, the lead-free faucet is a breeze to install in mist sinks.

Unlike many high-end units, you do not need any type of tools to detach or attach cartridge. Just twist and turn the EZ filter cartridge inappropriate direction to change it. It will hardly take a minute to change the filter. In fact, Culligan offers an easy upgrade of cartridge according to the supply you get.

Speaking of filter, the RC-EZ-4 filtration cartridge treats chloride, cysts, chloroform, mercury, lead, and other such harmful chemicals and heavy metals. In addition, it is tested and certified by NSF International to NSF/ANSI standard 42. This certification means the reduction of chlorine taste and odor from a fluid. Thus, you’ll get clean water with good taste which is ideal for cooking or drinking.

Our Observations

Pros:

  • Cost of the unit is low as it is not a reverse osmosis system
  • Includes chrome finished, lead-free faucet with mounting screws and supply adapter
  • You can switch between basic, advance or premium EZ model as per the need
  • Twist-on, twist-off mechanism eases filter replacement
  • It has a good flow rate for quick cleaning or rinsing
  • Its easy-to-follow instructions eliminate the need to call a plumber

Cons:

  • The flow rate of the premium model is a bit slower than basic and advance one

Key Features:

  • Premium filtration cartridge
  • Lead-free faucet
  • 0.5 GPM flow rate
  • NSF/ANSI standard 42 certified
  • 0.5-micron rating
  • Easy installation
  • 2-year limited warranty

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

APEC WFS-1000 Super Capacity Premium Quality 3 Stage Under Sink Water Filter System

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Taste of bottled water is definitely delicious. But some of us might not have enough space in our home or office to stock up a good amount of bottled water. Even if you have sufficient space, try to avoid using plastic bottles that are very much harmful to the environment. The best alternative to bottled water is to install a water filter in your home or office.

But are you stepping back from buying such unit because the water might not taste like bottled one? Then leave your worries to APEC WFS-1000 as their high-performance filters provide delicious tasting water just like you get in packed bottles.

WFS-1000’s 3 stages under sink water filter are made from high-quality components. These sturdy parts result in safe and long-lasting use of the machine.

The first stage or sediment filter removes large dust, particles, and rust from a fluid. Then after it passes to the second stage where the fluid is treated for odor, VOC’s and other such chemicals. And finally, carbon block section removes tiny contaminants and chemicals that are not visible through naked eyes.

Similar to the majority of the products on the list, APEC WFS-1000 also includes an ideal faucet. This 100% lead-free chrome faucet compliments various kitchen and office decors. Plus, spout height is good enough to let you fit long pots. In addition to a lead-free faucet, WFS-1000 includes FDA certified JG food grade tubing. This ensures no particulate matter or chemical gets in your way of getting clean drinking water.

Our Observations

Pros:

  • Fluid directly goes through the system and comes out from faucet, thus, no need for drain line
  • No presence of harmful chemicals from the filtration system to faucet results in a healthy output
  • Designed, engineered and assembled in USA according to US standards
  • Absence of the tank makes it easy for the user to install the system under small sinks
  • High-grade quality needs less frequent filter change whole offering high performance
  • Effectively removes chemicals, odors, etc and at the same time keeps important minerals and alkalinity

Cons:

  • Not designed for TDS removal
  • Avoid connecting it with hot pipelines

Key Features:

  • 3 stage filtration
  • 100% pure polypropylene depth filter
  • 10-inch carbon block
  • No water wastage
  • FDA certified food grade tubing
  • 100% lead-free faucet
  • 1-year satisfaction guarantee

6. Woder 10K-Gen3 – Direct Connect Filtration System

Woder 10K-Gen3 Ultra High Capacity Direct Connect Water Filtration System - Under Sink Filter Premium Class

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Do you struggle with limited space under the sink as there are already other appliances there? But getting a clean water supply is necessary for cooking and other kitchen activities. Then this small under sink water filter by Woder will help you with storage issues as well as supply fresh and healthy water instantly.

Credit goes to its 10K-Gen3 ultra-high capacity that treats municipally treated fluid. Therefore, its long-lasting capacity of filtering 10000 gallons makes it ideal for home or office use. Or you can even install it under the sink of your small coffee shop for a more healthy and tasty brew. Such large capacity lasts for a minimum of 3 years without any filter changes in between.

Wonder 10k under sink water filter is frustration-free certified. This certification means you can install the unit in minutes by performing basic operations. In fact, the main cartridge comes with direct connect hoses that fit standard 3/8-inch water valves. Such valves are common in US kitchen and bathroom sinks. Thus, all you need to do is find an appropriate wrench to connect the unit with a cold water line.

Our Observations

Pros:

  • Use of microparticles is the reason behind the long-lasting performance of the system
  • Connects within minutes with a standard 3/8-inch hose
  • Unique filtration technology removes over 99.9% of contaminants while leaving in essential minerals
  • The system also removes odor and bad taste of fluid
  • A flow rate of 2 gallons per minute is enough to carry out various kitchen activities without long waiting

Cons:

  • Not ideal for well or saline water
  • Cold line connection only

Key Features:

  • Selective filtration technology
  • 2 GPM flow rate
  • Direct-connect hoses
  • Frustration-free certificate
  • Built-in filter
  • ANSI standard tested
  • 1-year parts and labor warranty

7. Whirlpool WHER25 Reverse Osmosis (RO) Filtration System with UltraEase Filter Cartridges

Whirlpool WHER25 Reverse Osmosis (RO) Filtration System with Chrome Faucet

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If your region does not get sufficient municipal supply then you have to look for other sources. And other main sources include supply from private well or tanker. Reverse osmosis water filter works best with external sources and municipally treated supply. And with Whirpool WHER25’s 3-stage filtration reverse osmosis system you do not have to worry about clean water supply.

Though it does not offer more stages like high-end models but it does filtration excellently. And because of the presence of only 3 cartridges, the unit occupies less space under the sink. As compared to bulky 7 stages cartridges, this small yet powerful unit gives you more space. Therefore, you can utilize space for other necessary under sink appliances such as garbage disposal.

Unlike cheap filtration system, whirlpool reverse osmosis water filter eliminates the need of marking filter change. Thanks to its EZ-change indicator light that lets you know when to change the filter. Also, replacing cartridge is no big deal. The ultra-ease technology lets you remove and insert a new cartridge in seconds.

Our Observations

Pros:

  • Space-saving design is ideal for use under small size sinks
  • Reverse osmosis system is suitable to use with both municipal and well water supply
  • A light indicator lets you know when to change the cartridge
  • Does not require any tool to change filters, just twist and unlock to remove old cartridge and twist and turn to insert a new one
  • Includes a dedicated faucet for smooth flow

Cons:

  • Drain hose design could be better
  • Low faucet quality(as it comes free with the filter)

Key Features:

  • Reverse osmosis
  • 3 stage filtration
  • EZ-change indicator
  • NSF certified
  • 3-gallon tank
  • Color-coded tubing
  • Push-in connectors
  • 1-year limited warranty

8. Aquasana 3-Stage Under Counter Water Filter System Review

Aquasana 3-Stage Under Counter Water Filter System with Brushed Nickel Faucet

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Struggling with a tight monthly budget? Then relax you do not have to shed all your bank balance to get a glass of pure water. Aquasana 3 stage under counter water filter system is affordable and easy to get under $150. But do not let low price tag confuse you with its working ability. The 3 stages work brilliantly to provide you fresh, clean and healthy water instantly.

Water wastage is zero as Aquasana is not a reverse osmosis system. This automatically eases the connection of the unit as there are fewer parts to put together. In fact, the size of the machine is small and will not occupy much space under the counter. All three blocks can be easily mounted on side of the cabinet. Plus, Aquasana provides you with all necessary installation parts. In no time you can start using the machine.

While many other brands offer a single color dedicated faucet, Aquasana AQ-5300 offers 3 different colors. You can choose from brushed nickel, bronze or chrome finish that match your kitchen faucet set. No matter what color you choose, these faucets are 100% metal and 100% lead-free. So there are no chances of getting chemical particles when fluid comes out from faucet.

Our Observations

Pros:

  • Claryum filtration technology filters out harmful contaminants while retaining natural minerals
  • The budget-friendly price tag of this filter makes it popular among users
  • Comes with a stylish metal faucet with three different color choices
  • The system automatically alerts you when you need to change the filters
  • Simply twist and take out the old cartridge and replace it with a new one under minutes
  • 9 cent is the average cost per gallon with Aquasana AQ-5300

Cons:

  • Water flow rate is slow as compared to other models of the same range

Key Features:

  • 3 stage filtration
  • 600 gallon capacity
  • NSF certified
  • Zero wastage
  • Sediment pre-filter
  • Cartridge change alert
  • 1-year warranty

9. 3M Aqua-Pure Under Sink Water Filter System AP-DWS1000

3M Aqua-Pure Under Sink Water Filter System AP-DWS1000 Dedicated Faucet

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Basic function of any water filtration system is to remove chemicals, heavy metals, toxins, etc from a fluid. But along with removing all these harmful chemicals, the machine should also take care of its taste. While everyone loves to drink clean water, no one loves the odd taste. And thanks to 3M aqua-pure under sink water filter that only removes contaminants effectively but also provides great-tasting water.

The credit behind such delicious taste goes to the presence of the carbon-block filter. This advanced dual-stage carbon block help to improvise taste. As a result, you get fluid that is both healthy and good in taste. Furthermore, the universal system design is suitable for both chlorinated and non-chlorinated supplies.

Innovative sanitary quick-change design lets you change filters quickly without the help of any tools. Moreover, the machine shuts off automatically after treating nearly 625 gallons as a remainder to change cartridges. While tools are not needed to change the cartridge, you will need accessories to mount the unit safely under the sink.

Our Observations

Pros:

  • Two carbon blocks reduce particulate, chlorine taste and odor
  • Easily connects to standard kitchen pipelines measuring 1/4 inches(both inlet and outlet)
  • Includes a dedicated faucet having a shiny chrome finish
  • Built-in shut off valve allows changing cartridges easily without turning off the main supply of house
  • The system maintains a good taste of fluid that results in great tasting coffee, tea and baby formula
  • Ideal for both municipal and well water supply

Cons:

  • Connections are to made with cold lines only
  • Size of filters are large (check the under-sink area before installing)

Key Features:

  • Dual-stage carbon block filtration
  • 0.6 GPM flow rate
  • Quick-change cartridge design
  • Auto shut-off design
  • 1/4-inch push-in connection fittings
  • Built-in valve
  • 1-year warranty

10. Aquasana 2-Stage Under Sink Water Filter System with Brushed Nickel Faucet

Aquasana 2-Stage Under Sink Water Filter System with Brushed Nickel Faucet

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Here comes another Aquasana water filter on our review list. However, instead of 3 stages, this Aquasana AQ-5200R comprises of 2 stages. This new 2 stage filtration system uses NSF certified Claryum technology. This technology removes over 97% of chlorine and chlorinates along with various other contaminants.

If small under cabinet space is worrying you then Aquasana AQ-5200R is the solution. It only has 2 cartridges without any tank. This, in turn, leaves you with a lot of space under sink allowing you to install more appliances. Also, the absence of tank means zero water wastage. And you do not have to waste much time on installation.

Instead of providing faucet with the majority of plastic parts, AQ-5200R includes stylish metal faucet. This metal faucet is 100% lead-free and will not let any sort of chemical composites to mix with drinking water. So one sure thing with Aquasana under sink water filtration system is you will get pure and hygienic water instantly with a good flow rate.

Our Observations

Pros:

  • The space-saving design of the unit is ideal for small spaces under sink and cabinets
  • Presence of 2 stages results in faster flow
  • Faucet comes in three beautiful finishes to match with your existing kitchen faucet set
  • Absence of tank means no waster wastage and easy connection
  • The system alerts you when to change filters, thus, removes the guesswork

Cons:

  • Comparatively slow flow rate
  • Fluoride removal is slow compared to other filters

Key Features:

  • 2-stage filtration
  • 500-gallon capacity
  • 97.6% chlorine reduction
  • 0.5 GPM flow rate
  • NSF standard certified
  • Claryum technology
  • 1-year warranty

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Conclusion:

An under sink water filter is a convenient way of getting instant, fresh and healthy water supply. They are best for a single point of use such as under kitchen sinks or under the counter of office. These units are way too easy to install and occupies less space as compared to whole house water filtration system. Also, you can choose the right model according to the supply of your home or office gets.

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