Best Under Sink Water Filter – Reviews and Buyer’s Guide

You need the best under sink water filter beacuse staying hydrated may just be the only thing that can improve your mood. Think about it. When you move through the day not drinking enough water, you tend to feel more fatigued. With water, your alertness increases, and you are better at making decision whether at a job or at home. The reason why doctors recommend drinking lots of clean water is because the lack of it can bring a lot of problems. This may include premature wrinkling, tooth decay and even fainting in the middle of the day.

Access to clean drinking water is limited. People prefer buying disposable bottles but that can only get you so far. Buying a good water filter can improve your health conditions and can turn tap water into an unlimited supply of drinking water. Many countries around the world do not possess filtration plants that can turn tap water drinkable. Finding the right under sink water filter for yourself can save you the trouble of purchasing disposable 7-liter drums.

Water filters are a great one-time investment. They help filter out any impurities and create water that helps improve your body’s functioning.

What are Under Sink Water Filters?

As the name suggest, these are filters that are installed under the sink to provide with drinkable tap water. This way you don’t have to purchase a cooler or water dispenser to dispense drinkable water but can get it directly from kitchen tap.

Most cities in the world apart from the US, do not have the privilege of getting water that is vigorously treated before reaching the homes. Under sink water filters keep the water clean from any impurities and keeps you safe from all forms of water related diseases. The convenience of the under sink water filters is why a lot of people prefer to have them at their homes.

What’s more is that your kids can safely drink water from the kitchen taps as well. Kids often have a habit of drinking water from taps and in this way, your kids will remain safe from any bacterial infections. Clean drinking water is the right of every individual on the planet and these under sink water filters allow you to benefit from pure water right from your kitchen tap.

How do Under Sink Water Filters Work?

There are two types of filters in the market. These include a reverse osmosis filter and an on-demand water filter. The reverse osmosis water filter has the capacity to provide you with fresh, chilled water because it has storage capacity and can keep the water cooled.

On-demand water filters are your regular under sink water filters. They do not need storage, nor do they need a drain connection for usage. Under sink water filters filter just the amount of water that is to be used. They have one connection that lets the water in and another that is connected to the tap that lets the water out and into a glass or whatever you want to collect it in.

The pressure build-up in the water filter is how the under sink water filter works. As soon as the user opens the faucet, the pressure build-up allows the water to pour out. This simple function is the reason why under sink water filters are less expensive than conventional water filters.

How we Picked the Best Under Sink Water Filters?

Ease of Installation:

Under sink water filters need to have an easy installation manual along with the process itself. The idea of bending over for hours non-stop simply to set up the filter can sometimes restrict customers from purchasing the product because they think it is too hectic. Instead, we made sure we picked out under sink water filters that had simple, easy to understand guides. We also made sure the filter had components that would fit in just about any place you could find.

The easiest installation was possible only when the company provided a construction assistance, step-by-step guide. However, in the scenario where a person still does not understand, we made sure to check the customer support line. All of the following under sink water filter companies have an excellent standard of customer support service, therefore you do not have to worry about anything.

Maintenance Cost:

The maintenance cost determines how many times the filter combs will need to be replaced. This is done mostly to prevent any bacteria buildup in the filter. It is possible that during the entire filtering process, any unwanted materials will form as residues on the filter combs.

This is the reason why new filter combs needs to be purchased regularly. The filter cannot work without one and it must be done once every 6 months. This keeps your water safe to drink and ensures the quality is maintained throughout the lifetime of the under sink water filter. Other expenses include the pipes getting blocked, in which case you will have to purchase new ones to replace them.

Certification:

There are many fake water filter companies in the market who might try to weasel their way into your wallets. These companies do not make products based on quality standards to reduce their product’s manufacturing cost. They however, do sell the final product on the price that is given therefore increasing their profit margin. As a result, the low quality filters made by these companies ensure that thousands of people fall ill every year.

To make sure you know what you are getting yourself into, take your time to read the quality certification the under sink water filter company has received. This increases the credibility of the brand because people start trusting them more. Most certification are issued by government run organizations that judges the filters based on quality standards they need to meet.

Filter Capacity:

Most filters have the capacity to store water so that when it is finally dispensed, it stays cool. This feature also helps out in the case where you are dependent on the under sink filter to provide you with fresh water. If by any chance the water runs out, you can always rely on the water reserve you have. Generally, water filters have filtering capacity of around 100 to 300 gallons. Under sink water filters mostly do not have storage but it won’t hurt to find one that does, right?

Flow-rate:

The flow rate allows you to dispense the water faster through the faucet. The faster the flow rate, the quicker you can fill you glass up and go back to doing what you were doing. With people’s impatience being at an all-time high, it is no wonder some under sink water filter companies work hard to make this their unique selling proposition. They increase the water dispensing rates and this acts as an edge over other brands. We picked the ones that had a really good water flow rate to make sure you don’t have to worry about it.

Pricing:

The price is the final factor you need to take into consideration before making the purchase. Make sure you understand how the water filter is going to be an investment that will last for years to come. Also, do ensure that you purchase something that you don’t end up regretting afterwards about. The price ranges from around $100 to $250, depending on the quality, features and brand.  You can also purchase used ones on Amazon that are relatively cheaper.

How we Tested the Under Sink Water Filters?

Each under sink water filter we tested had to go through some very careful and thorough examination before we put it in this article. These under sink water filters were all given the same tests of safety, ease of installation as well as ease of usage.

The filters had to turn unclean tap water into drinking water and for that, we tested the water’s pH level after it had gone through the entire process of filtration. The right pH level allowed us to categorize and approve the under sink water filter for usage. The water filters were also tested for the different levels of filtration the water had to go through before it could finally become drinkable. The levels affected the overall pH score that the water got which had to be between 6.5 and 8.5.

We then moved on to see how quickly the filter could be fit under the sink. Since the sink could be very small, we made sure to include smaller filters that did an equally fine job of filtering the water. The filters that came with a manual were much more easier to install than the ones that came with barely any instructions. However, some of these filters were too good to let go therefore we added them to our list as well. We ensured that if there was any problem, the customer support helpline of each filter company would be good enough to provide guidance as to how the filter was to be installed.

Next, we had to check whether the faucet let out water properly or did the filter take its time. Nobody likes to wait for water to dispense and that is the reason we had to check the ease of usage of each product. Generally, most filters had an on and off switch that functions once connected with sufficient power. The water seemed to pass through the pipes properly, so we moved on to check the flow rate which determined how fast your glass would fill up. We were very satisfied by the performance of most of the under sink water filters.

Best 10 Under Sink Water Filters 2019

Here are the list of best under sink water filters, look for the one that suits your needs.

1. iSpring 75GPD – Best Under Sink Water Filter with Dual Outlets for Reef and Drinking

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The iSpring’s 6 stage reverse osmosis process is renowned throughout the world. The company is famous for providing its customers with the cleanest water there is, with a pH value towards the slightly acidic side. The reverse osmosis alkaline filters help not only to stop germs from passing by but also stop an excess of minerals from entering the drinkable water. This keeps your water in the safe zone of pH value 7.5.

This feature helps prevent pH levels fluctuating in your body, and ultimately helps you stay active and healthy throughout your day. Each glass of water is an experience as the product helps make the water taste better. The minerals that the RO filter gives back to the people include ionized calcium, magnesium, sodium, and potassium ions, which are needed in the body and in your blood to function.

The Drain to RO water ratio is around 2:1 which is relatively better than other under sink water filters. This means that for each gallon of clean water, only 2 gallons of water are wasted in the process of making the water pure. Other than that, the micron layered protection in the containments allow for the tiniest germs to be wiped out before the water reaches your glass. The company has ensured that the overall setup is as effortless as possible.

The ‘Push to Connect’ fittings and color coordinated tubing simplifies the installation process as much as possible to prevent the system from leaking later on. The iSpring also allows for a transparent and easy stage-housing container so you could see for yourself how your water becomes cleaner than before. The system is ready to be installed under your sink however, the 14.5 by 6 inch model may restrict it to medium-sized sink bottoms and above.

Pros
  • Multi-layered filter system for purer water.
  • Certified in killing 99.9% of germs.
  • pH level of 7.5.
  • An Alkaline Re-mineralization filter restores healthy minerals and a natural alkaline balance.
Cons
  • May consist of allergic chemicals.
  • Poor quality on components.

2. APEC Top Tier Alkaline – Ultra Safe Reverse Osmosis Drinking Water Filter System

Best Under Sink Water Filter Buy on Amazon  | See Discounted Price

The company boasts a truly supreme quality filter. This US based brand ensures safety through clean drinking water along with an elegant design to appeal to its target market. The system of the APEC is based on the 75 GPD 6-stage system that helps to removes up to 99% of bacteria, viruses, cysts, organics, chemicals & more. The tested pH levels after the cleaning process are recorded around 7 which is a perfect score for safe drinking water.

The US made cartridge that the company has carefully designed for pH enhancement uses food-grade calcium from trusted source to make the water safe. The calcium mineral present in the water is recommended for people who face fatigue and bone problems. It also helps to improve the water taste by a great deal.

The APEC is an under sink water filter that can be installed under 20 minutes. The brand has a reputation for providing safe drinking water to its customers for over 20 years. The company also provides a two-year extended warranty to people which greatly increases their credibility in the eyes of the customer. The system comes with 100% lead-free designer faucet that has a fast dispense rate than usual water filters. The product is also FDA Certified as a producer of contamination-free, drinking water that anyone can purchase.

The entire set is leak-free with premium quality and does not require an extra lock clip to seal leak. It also doesn’t rely on water leak detector like the ones other brands use to protect homes in a case where water suddenly starts leaking non-stop. The company has put full faith in their design and quality which might be taking a risk, but it sure pays off.

Lastly, their double carbon blocks can remove up to 99.99% chlorine chemicals in drinking water, which improves taste. The water you get now will have the ability to improve metabolism through the several minerals that will not be destroyed in the process.

Pros
  • Safe US made alkaline filter.
  • Super efficient APEC carbon blocks.
  • Free life time loyalty support service.
  • Easy installation and maintenance.
Cons
  • Complaints of leaks in replacements.
  • Complaints about low pH levels.

3. CuZn UC-200 – 50K Ultra High Capacity Under Counter Water Filter

CuZn UC-200 - 50K Buy on Amazon  | See Discounted Price

The product is known for its 5-year performance warranty and the storage capacity it holds that allows customers to keep water chilled for a long period of time. The CuZn UC-200 is an easy to install under sink water filter that connects directly to your kitchen sink’s cold water line. It is reported that set up takes only around 10 to 15 minutes and all that is required is an adjustable wrench that helps tighten the connections.

The product has a 3-stage filtration process that the UC-200 is specialized for as it purifies the water without removing any benefits to your health. These could include vital minerals that not only improve the taste of your water but also your metabolism. The bacteriostatic filtration system is not prone to get covered in mold from the length of the usage. This problem is frequently occurring in several filters that exist in the market that have poor standards of cleaning water. They have carbon filters that may sometimes get covered in bacteria over 2 to 3 years later.

The product can be mounted horizontally under the sink along with an able wrench and a few screws. The company however recommends the product to be installed standing on its base if there is enough space underneath your sink. The company also has an impressive customer support service that is available 24/7 for any queries that customers bring up on their website or through the helpline. Many reviewers online even commented on how the company contacted them in the matter of minutes to resolve their issues which is very impressive.

The CuZn is one of the best under sink water filters available in the market and is also cost effective. The product not only improves taste and removes chemicals in the water pre-cleansing but also removes any smell, giving a fresh sip of cold water on a hot summer day.

Pros
  • Great tasting water
  • 3-step filtration system keeps minerals intact.
  • Outstanding customer support system.
  • Compact and easy to install at your home or office space.
Cons
  • Is prone to leaking.

4. Woder 10K-Gen3 – Removes Chlorine, Lead, Chromium 6, Heavy Metals, Bad Tastes, Odors And Contaminants

Woder 10K-Gen3 - Removes Chlorine Buy on Amazon  | See Discounted Price

While other filters can help to treat water entirely, this filter needs to be used after some of the water has been decontaminated already. The disinfected water can then pass through this filter to clean anything else that may still be lingering in it. The Woder 10k-Gen3 lasts the users around 3 years depending on the frequency of usage. To attain the longest time period, customers can use the product with municipally treated cold water and not with well water. The Woder cannot be used with salty water as well.

The unique feature about this under sink water filter is how it can be set up easily. There is no need for plumbing as the water filter connects automatically with its ‘direct connect’ feature. The Woder can clean up to 99.9% of all lead, heavy metals, chlorine, chromium 6, mercury, volatile organic compounds, carcinogens, and other contaminants. The filter also improves the taste of the water along with the smell, so you get the best fresh water out there.

Another unique feature is in the design of this water filter. The selective filtration system is a technology developed by the company to eliminate 99.99% of contaminants while leaving in all essential minerals. These minerals go on to improve the body functions and much more. However, there aren’t any nutrients present in the water and experts gave it the term ‘dead water’.

Lastly, the filter has been tested by the American National Standards Institute that holds it accountable through and through. The filters have the ability to turn normal tap water into spring water with its unique technology which gives the consumers an incentive to buy the product.

Pros
  • Selective Filtration kills off 99.9% germs.
  • Natural taste of water with no smell.
  • No need for bottles in the fridge.
  • Much healthier than water filtered by RO.
Cons
  • Needs municipally treated water.
  • Needs replacement of parts after every 5 months.

5. UC-2K Fluoride + Wide Spectrumt – Easy to install at your home or office space

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The product comes with a 90-day satisfaction guarantee right off the bat. It has one of the biggest storages in water filters and can help cool water to make it seem like you’re drinking spring water fresh from the source. The product also comes with a 5-year warranty that further allows for establishing credibility in the eyes of the customers.

The UC-2K Fluoride also can also connect to your kitchen sink easily with it’s Connect Direct technology that takes only a few minutes of your day to set it all up. The lesser time it takes for that, the more you can have for testing the product out. All the product requires is wrench that can help tighten the connection under your sink.

The unique feature about this product is the 3-stage filtration system it has to improve overall water quality. The micro sediment membranes, KDF-55 & coconut shell carbon are all part and parcel of the quality maintaining features of the filter system to produce clean, drinkable water. They help by eliminating hazardous bacteria and keeping the minerals that are needed by your body to function properly. You are given test strips along with the product, so you may test the water for yourself whenever you want.

The UC-2K Fluoride is also has a bacteriostatic filtration system meaning it can prevent the buildup of bacteria and moss in the filter. Many filters in the market develop the problem after a year of use hence manual cleanups need to be done. This feature lowers your overall expenses and effort required. Lastly, the support helpline for UC-2K Fluoride is there to help you out with any problem that may occur after several years of usage. They are helpful bunch of people who we called and asked several questions from just to make sure.

Pros
  • Great tasting water
  • 3-step filtration system keeps minerals intact.
  • Outstanding customer support system.
  • Easy to install at your home or office space.
Cons
  • Is prone to leaking.

6. Home Master TMAFC – Full Contact Undersink Reverse Osmosis Water Filter System

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The Home Master is known for its quality control system that enables it to provide clean, drinkable water. It has an innovative design that helps to solve the most common problems associated with traditional RO systems. This can include the filter being able to fit anywhere along with the filter’s ability to clean water properly. The filter system has a seven stage filtration method that provides the user with the right enhancement to remove up to 98 percent of chemicals, including chloramine, and other contaminants.

Imagine drinking directly from a spring. The taste of the water is enhanced to meet the taste bud needs along with improving the smell and overall quality of water. The faucet literally gives you water that has been treated as much as it can. What’s more is that the water is rich in minerals because of the company’s patented Full Contact technology. This technology helps add calcium and magnesium minerals twice during the purification process which are essential minerals for body functioning.

The filter also has a built-in non-electric permeate pump. This pump reduces water waste up to 80 percent and increases water production up to 50 percent. The company not only made sure you get the water you deserve but also ensured you develop the habit of not wasting valuable drinking water. The filters themselves are easy to use and can last people for countless years to come. They can also be replaced easily after they have been fixed under the sink to reduce overall time and effort required to do so.

There are several RO systems that choosing the right one can be like choosing a needle in a haystack. This RO system provides its customers with the features they most crave for hence is a great contender in the market.

Pros
  • Clean, great-tasting water.
  • Modular filter design for easy replacement activities.
  • Better water efficiency and a faster flow rate.
  • Easy change of filters.
Cons
  • Instruction manual not very clear.
  • Strips that connect the entire are easily breakable.

7. Culligan US-EZ-1 – Certified by the NSF

Culligan US-EZ-1 Buy on Amazon  | See Discounted Price

This under sink water filter comes with a dedicated filtration system that comes with a dedicated faucet that can be fixed in almost all kitchens. The faucet is designed to provide with optimal water flow. The EZ change replacement filter cartridge comes with a quick connect system that can be changed in minutes.  The twist on and twist off feature is loved by many who use the product on a regular basis.

The cartridge also helps to eliminate bacteria and reduce moss buildup in the system.  If you’ve ever drunk from a bad filter, you would know that the moss ends up creating bad smell in the water along with giving you bad breath and more stomach problems. The included RC-EZ-1 filter cartridge is also tested and certified by NSF International because the company felt that it was necessary that customers trust the product in order to use it.

The market is filled with fake filters hence this feature alone increases the credibility of the water filter. The cartridge can filter water for a year after which it needs to be replaced. If you go beyond a year, chances are the quality of your water may drop.

There are several accessories that you get when you make the purchase that include a head assembly, RC-EZ-1 filter cartridge, lead-free faucet, 1/4″ thick clear tubing, mounting hardware, cartridge change reminder sticker. The overall water flow rate is fast enough to fill your glass up in 4 seconds. The cartridge performance is the primary target of the company and surely, they have achieved great success in it. The interchangeable cartridges allow you to easily change to the kind of cartridge that you think is best suited to your water needs.

Pros
  • Several accessories to improve performance.
  • Filter performance is top notch.
  • Certified by the NSF.
  • Twist-on, twist-off filter mechanism allows to change cartridges easily.
Cons
  • Installation is tricky if you aren’t a handy person.

8. APEC WFS-1000 – High Performance Under Sink Water Filter

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The design and the functioning of this water filter are both designed in the US. This water filter is famous for its clean drinking water and the neat design that it comes with. The under sink water filter provides the customers with a range of features they cannot say no to.

This includes a super capacity filter that helps treat water to its finest quality. The filter is able to clean both tap water as well as well water, therefore providing a number of health benefits and improvement in digestion. The product also comes with a 100% Lead-Free chrome faucet that is known to last for more than 5 years if used properly. The filter is also approved by the FDA for food grade tubing which means the water that passes through the filter is as clean as that of any company selling you some.

The filter also has a lifetime guarantee which is a huge statement by the company who believe in the filter’s water cleaning properties. The filter is known to eliminate all chemicals or bacteria from the water as they pass through the three cartridges. This helps remove the bad taste and odor as well.

Pros
  • High performance, low cost & longer filter life.
  • Fast water flow, no tank is needed.
  • Keeps important minerals, higher alkalinity.
Cons
  • Requires more space.
  • Is prone to leaking.

9. Ecosoft 3 – Best Under Counter Water Filter for Office and Commercial Use

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This filter is not only limited to the confinement of your sink but can also be set up in offices or inside a trailer because of its amazing design and commercial usage properties. The technology that the company uses is 100% patented therefore separating it from the rest of the water filters in the market. The Commercial Grade Ecomix technology has changed the way water is purified and has increased the health benefits to drinking water.

The water filter removes any bacteria that may be present in the tap or well water. The filter system also removes bad smell and taste that can give you a bad stomach ache, indigestion and even diarrhea. Ecosoft is also easy to install inside homes and also has a long-lasting filtration system. This system eradicates the chances of leaking which is a prevalent issue in a lot of filters in the market. The company has focused greatly on making the Ecosoft 3 the filter that not only helps you save money but also the Earth.

How come? Well, replacing water bottles with an Ecosoft Water Filter can help save up to 2500 water bottles every 400 gallons you drink. That’s a huge number of water bottles that do not enter the oceans of our planet or pollute anywhere on land. The company also provides a 1-year guarantee to first time consumers who have to make the tough choice of choosing from the thousands of filter brands present in the market.

Pros
  • Removes harmful bacteria and all kinds of contaminants.
  • Filters are made from 100% BPA free and European grade plastic.
  • 3-stage filtration system.
  • Save up to 2500 bottles from polluting the Earth.
Cons
  • Doesn’t connect to a standard sink valve.

10. APEC Top Tier Supreme – Durable Under Sink Water filter

APEC Top Tier Supreme Buy on Amazon  | See Discounted Price

The longevity of the filters in this product are amazing. The APEC Supreme is the most durable system in the industry that lasts for decades. The system is designed, engineered and assembled in USA to guarantee water safety and health. The company has FDA approval and also carries the title of having the tastiest water there is in the market.

The high-performance filtration system kills up to 99.9% of the bacteria that may exist in tap water or well water. Contaminants including arsenic, chlorine, lead, fluoride, heavy metals, bacteria, virus and more than a 1000 more contaminants are easily dealt with by the filters to provide you with the purest water there is.

The filter also adds calcium carbonate to effectively raise the pH levels in the water and also provide your body with essential minerals to stay alive and active. The faucets are made from 100% metal and are lead-free to increase the overall life of the faucets. This means you do not have to make additional expenses to maintain the product from the get-go. The company also provides its customers with a lifetime support system that keeps solving any issues you might face in the years to come.

Their filters have had to go through several testing before they could finally be approved to be sold in the market. The FDA approved filters are just what you need at your home, protecting your family and providing benefits through clean drinking water.

Pros
  • Double capacity and water storage.
  • Healthy alkaline water for health benefits.
  • Super-efficient carbon APEC blocks that remove chlorine and chemicals.
  • Amazing taste of water with purest 7.5 pH levels.
Cons
  • Troubling to set-up.
  • Larger in size than other under sink filters.

Conclusion

If you think about it, choosing the right filter could help prolong your life. The water you drink helps keep your body healthy and also strengthens your immune system. You generally perform better at work if you are taking the required amount of water (and more) per day.

The right filter can also help reduce your daily efforts. No longer will you have to worry about a leak or the filters/ cartridges need to be replaced. Choosing the best one means getting the best value out of the filter as possible with the least cost on it. That is of course possible as the filters mentioned above are tested for their innovative design as well as function.

Make sure you choose wisely because at the end of the day, you’d have to deal with the problems that are associated with unclean drinking water. There should be no compromise on that especially when it concerns your family. Your kids will no longer get sick frequently, and neither will you have to fetch them a glass of water each time they ask for it. You can easily teach them how to use the faucet and take it for themselves. After all, the ease of usage is part of an under sink water filter’s many features.

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