Top Under Sink Water Filters


CuZn UC-200 Under Counter Water Filter
  • Simple installation
  • Bacteriostatic filtration system
  • Five-year warranty


Culligan US 1 EZ-Change Undersink Drinking Water Filtration System
  • Certified by NSF International
  • An effective way to provide cleaner
  • Quick connect fittings guarantee


iSpring RCC7AK Under Sink Water Filter System
  • Premium-quality components
  • Incredibly easy to inspect the filters
  • Featuring as longest-lasting filters

Under sink water filters have never been so efficient. These filters have progressed so far concerning technology; they can now remove contaminants that previously relied upon reverse osmosis systems.

Even better, they produce no wastewater, unlike reverse osmosis systems. They're affordable, out of sight, and have fantastic filtration rates.

In the following piece, we will look at the top products that are currently available today. After discussing the pros and cons of each, we'll explain why investing in one of these filtration systems is beneficial to you and your family.

So, without further ado, let's check out our top five under sink water filters.

We’ll start with our favorite product!



Top Pick

CuZn UC-200 Under Counter Water Filter

This CuZn under counter water filter is one of the highest-rated water filtration systems in the world. After reading through the advantages that this model offers, and considering its cost, it's a no-brainer as to why this is one of the market leaders.

The CuZn UC-200 has a simple and efficient installation process. Also, unlike many other under the sink water filters, this model doesn't require an additional faucet. Instead, it connects directly to your sinks cold water line. This filter includes all of the necessary components for installation, making it a dream to install, without the need to hire a plumber.

Another advantage is the longevity that you will get if you purchase this product due to its long-lasting filter, capable of producing 50,000 gallons of filtered water. Most households will filter around 10,000 gallons per year. So that's five years of filtered water.


  • Simple installation, all the tools that you'll need are provided, aside from an adjustable wrench.
  • BACTERIOSTATIC FILTRATION SYSTEM: Unlike Carbon Only Filters, The UC-200 is Bacteriostatic and therefore not Susceptible to bacteria or mold Growth.
  • Five-year pro-rated warranty and a 90-day satisfaction guarantee.


  • This water filter is slightly larger than other models available. This is only an issue if you are using a disposal system installed in a small cabinet.



Culligan US 1 EZ-Change Undersink Drinking Water Filtration System

This system includes a dedicated faucet that can easily be installed in most sink models. At this price, homeowners can be rewarded with cleaner filtered water for drinking or cooking.

This particular budget model comes with EZ change replacement filter cartridges with simple connection fittings. All you have to do is twist on and twist off the cartridges, and you're away! The RC-EZ-1 filter cartridge is included with this model and it guarantees the removal of bad taste and odor from your water.

However, for higher filtration level needs, Culligan offers a range of interchangeable upgrade filter systems. These additional cartridges are easy to twist on and off and can be purchased in line with your individual filtration needs and requirements.

The included RC-EZ-1 cartridge can filter up to 3,000 gallons of water, which means that it could potentially last twelve months.


  • The US-EZ-1 has been tested and certified by NSF International to NSF/ANSI Standard 42 for the reduction of Chlorine Taste and Odor and Nominal Particulate Class III.
  • Using this particular drinking water system is a more effective way to provide cleaner, better-tasting water for your home.
  • Quick connect fittings guarantee that the filter remains in place until it needs changing. Therefore, there is no need to worry about hidden spills or leaks.


  • Some customers have complained about slow flow speeds with this particular product.
  • There have also been some complaints regarding leaks coming from split filter cartridges.



iSpring RCC7AK Under Sink Water Filter System

For those looking to spend a little more and get a superb quality product, look no further than this beauty! 

This incredible machine uses reverse osmosis water filtration to make your drinking water healthier and safer. It can be mounted beneath your sink and will remove over 99% of more than 1,000 contaminants.

This includes the removal of 98% of lead, arsenic, asbestos, hormones, bacteria, viruses, calcium, sodium, and much more. People that purchase this product can look forward to better tasting food, crystal clear ice cubes, and fresher coffee every single morning.

What's more, it's easy to install and can be typically fitted within a couple of hours. It fits under most standard sinks and includes all the parts for installation alongside concise instructions and videos to follow.

What's unique about this product is that it includes an alkaline remineralization filter that restores healthy minerals and produces balanced alkalinity. This helps to give your water a more natural taste after the reverse osmosis membrane takes away harmful pollutants.


  • Premium-quality components ensure low maintenance and excellent reliability for years to come.
  • Clear see-through 1st stage housing makes it incredibly easy to inspect the filters.
  • Featuring some of the longest-lasting filters in the entire industry, this system consists of 6 stages, each stage designed to remove contaminants and rapidly improve water quality and purity progressively.


  • This product has a one year warranty but has been known to develop leaks after thirteen months in some cases. Simply err on the side of caution by placing trays below the product to detect any leaks as soon as they occur.


Woder 10K-Gen3 Water Filtration System

This product has been specifically designed to be used with municipally treated drinking water as opposed to well water.

The manufacturers have stated that this premium class under the sink filter will last for a minimum of three years or 10,000 gallons. For optimum longevity, don't use this product with salty or softened water.

This is a great budget option and is very effective for its price. The system is NSF approved, and so are all of its filter materials and components. An additional advantage of purchasing this model is that it includes all the accessories needed for installation. All you need is an adjustable wrench to plumb the system into your household completely.


  • Eliminates 99.9% of lead, heavy metals, chlorine, mercury, carcinogens, and other contaminants.
  • Selective filtration - Meaning that Woder's technology removes 99.99% of contaminants but leaves in all the essential minerals that your body needs.
  • Woder filters are independently tested to the ANSI standards (American National Standards Institute). Therefore you can be confident that Woder-filtered water is of the highest possible quality.


  • Slower water pressure - will reduce the water pressure that reaches your taps by as much as 20%. If you already have low water pressure, this could be a problem.


APEC WFS-1000 Under-Sink Water Filter

The APEC WFS-1000 is a premium-quality product. Engineered, assembled, and designed in the USA, it includes a super capacity filter for dependable, long-lasting filtration.

This under the sink model comes with a one-year satisfaction guarantee and can treat well water and tap water using its long-lasting premium filter.

This particular model comes with a 100% lead-free chrome faucet and FDA certified JG food grade tubing, guaranteeing the purest, safest, contamination-free water. Chemicals such as chlorine will be a thing of the past as this product's filtration system eliminates all chemical tastes and odors from your drinking water.


  • This system will not waste water or require regular filter flushing, so all of the water entering the system goes straight into your glass.
  • Removes chemicals, odors, tastes, and VOCs from your water while still keeping important alkalinity and minerals.
  • Speedy water flow, no tank is necessary. Enjoy clear, filtered water in an instant.


  • Specific models have been known to leak over extensive periods of usage. However, this product does have a one year warranty.

Buyers Guide

There are four main things that you should look for in an under sink water filter:

1. Water Pressure

Look for a water filter that is capable of delivering good water pressure, especially if you have low water pressure in the first place. However, the downside of increased pressure is that water sends less time running through the filter, so try to find a happy medium.

2. Filtering Capacity

Always use a home water quality testing kit before you purchase a filter. This will help you to identify the primary contaminants that you want to remove from the water. Use this information to find a model that will efficiently remove these contaminants.

3. Ease of Installation and Filter Change

If a unit is a nightmare to install, you could damage it, or damage your plumbing system. If the filters are difficult to change, then you may end up having to call in a plumbing professional to change them. Both of these factors could end up costing you a fortune in additional fees. Therefore, it's worth doing your homework and reading product reviews and specifications.

4. Cartridge Longevity

Some models will only need a new filter cartridge every three to five years. Others will need new filters every six months.

Be aware that cartridges are tested with municipal quality water as it leaves the water treatment facility. After this, it travels miles and miles through pipes and picks up additional contaminants, so the water you use will often be more contaminated than the water that the cartridge has been tested with.

Final Verdict

Although all of the products mentioned in this piece are excellent choices, we recommend purchasing the CuZn UC-200. It's hassle-free, simple to install, high performing and affordable. Again, this product will last you a minimum of five years, and it's incredibly easy to install. The UC-200 requires virtually no maintenance and installs in roughly 5 minutes, hooking up to your cold water supply. When you turn on the cold water tap on your sink, it will be CuZn pure.