(Expert Picks) 8 Best Under-Sink Water Filter You Can Install Yourself

Kenneth Wilson

If you're reading this article, there's a great possibility that you may be thinking about buying an under-sink water filter.

Now, under-sink water filters continue to rise in popularity for several good reasons: (1) It is affordable, (2) It can be easily installed, and (3) It requires little maintenance. So if you want to avoid breaking the bank by buying a whole-house filtration system, you may want to consider an under-the-counter water filtration system instead.

To make it easier for you, we've compiled a list of the top under-sink water filter expert picks– based on their efficiency in filtering out harmful contaminants from your home's drinking water supply.

796 Ratings

The Waterdrop brand is renowned for its extensive water filter offerings. In particular, this water filtration system is famed for its innovative water purification features.

4,801 Ratings

If you're looking for the best-value water solutions, Frizzlife is the brand to consider! In particular, their under-sink water filter system gives you reliable water purification without having to break the bank.

1,085 Ratings

The Aquasana 3-stage water filtration system is another option you should look into. Its filter can guarantee maximum contaminant removal and easy access to purified water.

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This next under-sink water filter option also leverages a proven 3-stage purification process to ensure all impurities are removed from your water– while keeping the essential minerals.

2,803 Ratings

Culligan is another trusted name in the industry, with many good reviews from long-time customers. It is also designed to remove cysts, lead, and mercury contaminants.

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Home Master's simple under-sink filter system has a dedicated water faucet to provide purified drinking water.

99 Ratings

This product also has a relatively easy installation and straightforward filter replacement. Additionally, the Multipure Aquaversa MP750 is certified to NSF standards 42, 53, and 401.

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At a fraction of the price of other water purification system counterparts, the Clearlyfiltered under-sink filtration system efficiently combines filters to give you the purest drinking water possible!

In This Review & Buyers Guide

Under-Sink Water Filters: Top Expert Picks

Many households depend on water filtration systems, mainly because their tap water supply is undrinkable. Not to mention, tap water may unwittingly make you ingest certain bacteria, which may harm your health. We've asked experts for their favorite under-sink water filter options, and we've compiled them into this list for your convenience.


With several advanced features and a futuristic design, the Waterdrop 3-Stage Ultra-filtration System is an excellent choice to consider. The Waterdrop brand is renowned for its extensive water filter offerings. In particular, this water filtration system is famed for its innovative water purification features.

Your purchase includes three RO filters, ensuring any contaminants are thoroughly filtered out of the water. Its tankless design also helps avoid the potential clogging of bacteria or other harmful substances. (Related: What Are Waterdrop Filters? Here's Everything You Need To Know)

Advantages


  • Multi-stage filtration process
  • Deepwater purification
  • Enhances taste, odor, and color of the water
  • Tankless and space-saving design
  • Easy installation
  • Smart monitoring technology
  • Auto flush function to provide you with the freshest water
  • Refund coverage of up to a month

Disadvantages


  • The overall cost can be expensive
  • Frequent replacement of the three Reverse Osmosis filters can add up to the costs

Additional features include: Automatic flushing, TDS display to inform it's time to replace the RO filters, and other smart features you need to check out.


The Aquasana 3-stage water filtration system is another option you should look into. Its filter can guarantee maximum contaminant removal and easy access to purified water.

Not to mention, this product is manufactured by Aquasana, an award-winning brand in the industry.

Advantages


  • Can filter out 77 of the most common water contaminants
  • Activated carbon filter eliminates herbicides, pesticides, and other harmful chemicals
  • Doesn’t use any additives during water filtration
  • Filters are easily replaceable
  • Certified by NSF and ANSI standards
  • Affordable price
  • Eco-friendly build

Disadvantages


  • Its size is not compact
  • The filters only last for about six months
  • Replacement parts can be tricky to find, given their unique build

Culligan is another trusted name in the industry, with many good reviews from long-time customers. You may want to check out the Culligan EZ-change filter system, as it has low initial costs and cheap replacement filters.

It is also designed to remove cysts, lead, and mercury contaminants. Some users of this filtration system also note it reduces the strong chlorine taste and color in their water. 

But, its granular activated carbon filter may not be as impressive as the other top picks.

Advantages


  • Cost-effective price
  • Easy installation and replacement of filters

Disadvantages


  • Uncertified to remove Perfluoroalkyl and Polyfluoroalkyl Substances (PFAS)

Homeowners looking for a compact under-sink water filter, this Multipure unit may just be what you need. You may mount the 5.8" x 5.8" x 8.5" housing to a cabinet wall, giving you more room for other items below the sink.

This product also has a relatively easy installation and straightforward filter replacement. Additionally, the Multipure Aquaversa MP750 is certified to NSF standards 42, 53, and 401.

You can count on its solid carbon block filter to capture different contaminant varieties!

Advantages


  • Compact, space-saving design
  • Excellent filtration capabilities
  • Resistant to clogging

Disadvantages


  • Rather expensive

If you're looking for the best-value water solutions, Frizzlife is the brand to consider! In particular, their under-sink water filter system gives you reliable water purification without having to break the bank.

Even with its affordable pricing, it doesn't compromise the quality of its units. This product also offers 0.5-micron filtration technology, an auto shut-off valve, and dual water-line compatibility.

Advantages


  • Can filter out up to 99.99% of contaminants
  • Quick installation
  • Filter replacement is cheap and easy
  • Best bang for the buck
  • Environmentally friendly
  • Compact design
  • It can be used with any faucet
  • 30-day money-back guarantee

Disadvantages


  • Has a shorter filter life (than other counterparts)
  • It may be incompatible with certain faucets
  • Inconsistent compatibility with some water lines. As a result, the water pressure may drop.

This next under-sink water filter option also leverages a proven 3-stage purification process to ensure all impurities are removed from your water– while keeping the essential minerals.

Customers are impressed by this system's easy installation and set-up, taking only around 5 minutes without having to drill or mount anything.

The UC-200 Filtration System is expected to last for years from the manufacturer itself. It can also filter up to 50,000 gallons of water (and more).

Advantages


  • Durable and long-lasting
  • Company-issued replacement given system failure within five years (at no cost)
  • Easy installation
  • Affordable option
  • Free custom installation kit
  • Bacteriostatic filter prohibits possible mold or bacteria growth in the system
  • Made in the USA
  • 90-day satisfaction guarantee
  • Consistent company support

Disadvantages


  • It may not be suitable for well water
  • Cannot soften hard water
  • Cannot reduce TDS or PPM readings
  • No filter replacement option. You will need to replace the entire system after five years of use (or after the system filters 50,000 gallons of water)

Home Master's simple under-sink filter system has a dedicated water faucet to provide purified drinking water. It also has a 7-stage reverse osmosis water purification filter to provide only the cleanest water for you and your family.

Additionally, the installation for this unit is also a breeze. It also has a reliable filter, so the system only requires minimal maintenance on your end.

Advantages


  • Easy DIY installation
  • Your purchase already includes all the needed parts
  • It comes with a 5-year manufacturer warranty
  • It does not reduce the flow rate, unlike other under-sink water filters
  • Proven to filter out contaminants in the water
  • Adds minerals to the water to make it healthier and more refreshing
  • A filter can hold up to 2,000 gallons of water (around 1-year of regular use)

Disadvantages


  • Its water feed adapter and the shut-off valve are only available in 3/8-inch sizes

At a fraction of the price of other water purification system counterparts, the Clearlyfiltered under-sink filtration system efficiently combines filters to give you the purest drinking water possible!

In particular, it has three unique filters that can remove specific contaminants from the water. It boasts a 99.5% rate in clearing out fluoride and lead– which only costs you less than $500.

If you're looking for the best value for your money– this may just be what you're seeking.

Advantages


  • Each filtration stage targets a group of contaminants
  • Effective in removing common contaminants such as chlorine, heavy metals & VOCs
  • Quick and easy installation (It only takes 10 minutes to install the system)
  • The mounting plate is notably tough and sturdy
  • Improves the taste of water
  • Visible water clarity difference after installation

Disadvantages


  • Reduces the water pressure
Kenneth Wilson
February 17, 2022
Interior, Reviews

Kenneth Wilson

Retired contractor. Currently residing in Southwest Florida. Now in semi-retirement, I write and manage this blog focused on helping home owners make savvy decisions when it comes to finding contractors and getting their projects done. I also operate remodeling design service for homeowners.

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