Best Under Sink Water Filters

Posted on the 01 January 1970 by Charlene Farwell

Are you shopping for water filtration systems? Check out our list of the best under sink water filters, expertly selected to meet your household needs.

Access to clean and safe water is a basic human need. By now you know that water plays a central role in the life of any organism, humans included. The need for clean and safe water for human consumption cannot be overemphasized. No matter the source, water normally comes with many impurities.

Some have more chemical that physical contaminants while the converse is also true for some other types of water. It is very hard to tell the number of impurities by simply staring at the water in a container or glass. For instance, you must have noticed that some plumbing pipes and fixtures are clogged with plug, scum, and scale, right? Yet water trickling from such pipes appears clean.

Clearly, there’s more than meets the eye concerning water contaminants. Luckily, there are devices with the technology and capacity to remove most of the contaminants from your household water. One such equipment is the under sink water filter. It is compact in design and size so it fits into very small spaces. They come in different brands and models. As such, one has to be more than certain of what to look for in a good under sink water filter. For you though, we have done all the donkey work.

Research, evaluation, and comparisons have been done by our team of experts. In a nutshell, this review is basically a roundup of the best under sink water filters in 2020. Take your sweet time to compare and contrast the various product.

That’s it for the intro. Now, straight away to some definitions.

Product name Filtration Stages Filter life span

WaterChef U9000 Premium under sink water filter 1 10,000 gallons or 3 years

Aquasana 3-Stage Max Flow under sink water filter 3 3,000 gallons or 12 months

iSpring RCC7 5-Stage High Capacity Under sink water filter 5 3,000 gallons or 1 year

Global Water RO-505-5 stage reverse osmosis filter 1 3,000 gallons or 12 months

The iSpring 100GPD 7-stage Reverse osmosis RO UV Alkaline water filter 1 10,000 gallons or 3 years

APEC WFC-1000 super capacity premium under sink water filter 3 6000 gallons or 2 years

The iSpring WCC31 3-stage under sink tankless filter 3 50,000 gallons or 1 years

Aquasana 2-stage under sink water filter system 2 500 gallons

The 3M Aqua-Pure under sink water Filtration system 1 6,000 gallons

EcoSoft 5 stage Reverse osmosis water filtration system 5 10,000 gallons

What is an under sink water filter?

Under sink water filter is, as the name suggests, a water treatment system that removes most solid and chemical contaminants from your household water. The latest models are said to be more efficient than the former. In fact, according to some manufacturers, the tap water filters are now just as efficient as their reverse osmosis counterparts. So, if you weren’t sure which one of the two to go for, I can tell you confidently that the under sink varieties are just as good. And besides, they are nicely concealed under your sink in addition to the fact that they do not accumulate any wastewater.

Do you really need an under sink water filter?

Bearing in mind the latest modifications and performance enhancement features that have been added to these types of water filters, I can confidently say that yes, you need one of these. In terms of performance, it works just as efficiently as reverse osmosis filters. They are cheaper and take up very little storage space. With all these pros and a couple others, not included in this content, it is very easy to tell which option to go for.

That said, let’s head straight to the different types of under sink water filters. We will start off with a tabulated version of the same. The table below provides you a quick overview of the different brands and models that we have includes in our under sink water filter review.

Best Intelligent Cartridge Monitor Detailed Review With Pros & Cons

  • WaterChef U9000 Premium under sink water filter

Eliminate all tap water contaminants with the help of a high grade under sink water filtration system that also improves the taste and quality of your water. Say no to expensive cartridges and plastic bottles that have to be replaced time and again. By design, weight, and construction, this water filter is best suited for use at home, office, and even restaurants. It utilizes the Big Block Filtration technology capable of removing quite a lot of contaminants, both chemical and physical. Because of their high efficiency, WaterChef U9000 premium water filter only requires a single cartridge replacement every year.

It also comes with an intelligent cartridge monitoring function. This ensures that your filter cartridges are always in good shape. You won’t have to discard healthy or even unknowingly continue using worn-out cartridges. In terms of performance, this under sink water filter is NSF certified. Testing and approval by the industry’s leading authority is itself sufficient proof of superior performance.

Lastly, every purchase of WaterChef U9000 Premium water filter for sink is backed by very comprehensive warranty coverage. This takes care of repairs and replacements.

Why We Like It:

  • The smarter way to improve the taste of your drinking and cooking water.
  • Can be used at home, office, or even restaurants to filter water for use.
  • Uses Big Block filtration technology to remove a range of tap water contaminants.
  • Cartridge replaceable once every year.
  • Features an intelligent monitor that helps you take the guesswork out of cartridge replacements
  • Backed by a comprehensive warranty coverage.

Why We Hate It:

  • Not identified

Best Comprehensive Warranty

  • Aquasana 3-Stage Max Flow under sink water filter

Ever used a Bluetooth water filter? Well, this is another one with Bluetooth connectivity and a horde of other classic features. The latest models of Aquasana under sink filters supports 44% faster flow rate than the old models. Every set of filters, therefore, have an output capacity of 800 gallons.

What I like most about this under sink water filter is that it has a 99% contaminant removal efficiency. This is one of a few Bluetooth filters that is NFS certified for quality performance. It user Claryum filtration technology that selectively removes harmful mineral contaminants while retaining the beneficial mineral ions.

Why We Like It:

  • Provides fresh and clean water to keep you and family hydrated all day every day.
  • Uses Claryum filtration system that selectively eliminates harmful and retains healthy mineral salts.
  • Supports 44% faster flow rate with a total output capacity of 800 gallons
  • Comes in an eco-friendly design featuring a premium finish
  • Bluetooth function connects to your smartphone via a dedicated smartphone app.
  • Every purchase comes with a 90-day money back guarantee and 1-year warranty.

Why We Hate It:

  • Filters require replacement more often than is the case with other under sink water filters.

Simplest Installation Process

  • iSpring RCC7 5-Stage High Capacity Under sink water filter

Reverse osmosis filtrations systems are by far more superior in water treatment compared to other filtration systems. The iSpring RCC7 5-stage water filter faucet makes use of this technique to guarantee you and family healthy water for household use. This water softener is reputed for its 99% contaminant removal efficiency. The entire household is safe and secure from any waterborne infections often associated with chemical, physical, and biological water contaminants. Every time you turn your faucet you will be treated to a clean and fresh water, free of any form of contaminants. This is a Gold rated under sink water filter, according to the Water Quality Association (WQA). It is therefore reliable and easy to maintain.

Why We Like It:

  • Simple and direct installation process. In fact, there’s a video to help you with the whole installation process.
  • It features premium quality components that are Gold certified according to WQA.
  • Super reliable and low maintenance water filter for sink.
  • Features a brushed nickel all metal faucet and a clear see-through housing.
  • Backed by a 1-year warranty and a lifetime tech support.

Why We Hate It:

  • The filters wear out much faster hence require frequent replacement.

Best Reverse Ssmosis Under Sink Water Filter

  • Global Water RO-505-5 stage reverse osmosis filter

This is a high performance 5 stage reverse osmosis water filter that is also reasonably priced. With this under sink water filter, you will be able to remove up to 99% of chemical, biological, as well as solid contaminants. Its quality and performance are NFS/ANSI standard 58 compliant. Therefore, you can rest assured of superior performance as far as water filtration is concerned. It comes with quick connect fittings with self-secure technology. This implies that you won’t require clips for safety lock.

Its 5 stage filtration system features a polypropylene 5-micron sediment filter for 1st stage filtration, 2nd stage filtration is done by GAC coconut shell activated carbon filters. The 3rd stage is done by CTO 5 Micron coconut shell block carbon filter. The 4th stage is by high-quality TFC RO membrane while the 5th stage filtration is undertaken by Inline filter cartridge quick connect polishing filters.

Why We Like It:

  • Uses reverse osmosis system to reduce the number of water contaminants with an efficiency of up to 99%.
  • Features a set of quick-connect fittings and self-secure technology which eliminates the need for clip safety locks.
  • The 5 stage water filtration system ensures clean water that is free of any chemical and physical contaminants.
  • The design and performance are NSF/ANSI standard 58 certified.

Why We Hate It:

  • No warranty coverage.

Best Multistage Filtration

  • The iSpring 100GPD 7-stage Reverse osmosis RO UV Alkaline water filter

If your tap water has significantly low pressure, then iSpring 100GPD tap water filter is all you need. It utilizes reverse osmosis technique to eliminate bacteria, viruses, chemical, and physical contaminants. It features a booster pump that helps bring water pressure to the right level, just enough to facilitate effective reverse osmosis filtration. An inbuilt UV sterilizer eliminates bacteria and viruses from your household water. The iSpring 100GPD uses Red mineral stones to replace the essential mineral salts eliminated by calcium carbonite filter. This helps keep the water beneficial to your health. The installation process is easy, thanks to the push connect fittings and color coordinated tubing. And there’s a video to help you with the installation process, in case you are experiencing some issues.

Why We Like It:

  • Easy installation process featuring push to connect fittings and color coordinated tubing.
  • Comes with high-end dual filters; GAC & CTO. The two have a set of loose carbon that enhances the trapping of contaminants.
  • Comes with a reinforced transparent 1st stage housing which allows you to easily monitor and inspect the sediment filter.
  • Has a durable multilayered filtration membrane with a filtration rate of up to 100 gallons per day.
  • Booster pump makes this tap water filter ideal for use even with low-pressure tap water supply.
  • Inbuilt UV water sterilizer
  • Red mineral stone filters help replace all the essential mineral salts lost at the calcium carbonite filters.

Why We Hate It:

  • The filters need replacement once every 6 months.

Cheapest Under Sink Water Filter

  • APEC WFC-1000 super capacity premium under sink water filter

Enjoy dependable and reliable household water filtration with APEC WFC-1000 under sink water filter. It is engineered and equipped with the US made high capacity filter ideally suited for softening tap and well water. Every purchase of APEC WFC-1000 comes with a 100% lead-free chrome faucets alongside FDA certified food grade tubing. You will also get a 1 year dedicated tech support and lifetime customer support by certified WQA water specialists. This water filter faucet comes with a ½ to ⅜ inch feed water adapters and a max pressure of up to 85 psi. It supports a 3 stage filtration system with the first stage using a 10” high capacity polypropylene sediment filter. The second & third stages use of 10” premium excluded carbon block filters.

Why We Like It:

  • It makes use of high performance, low cost and durable super capacity filters capable of lasting more than 12 months before replacement.
  • The 3 stage filtration process delivers water to your faucets fast enough hence no need for a storage tank.
  • No need for filter flushing hence no water wastage.
  • The high-end filtration process removes harmful contaminants while retaining all the vital mineral salts and alkalinity.
  • Superior quality and performance for long-lasting filtration experience.
  • Comes with 100% Lead-free chrome faucets together with FDA certified JG food grade tubing for safe water.

Why We Hate It:

  • No product warranty.

Best Tankless Under Sink Water Filter

  • The iSpring WCC31 3-stage under sink tankless filter

This system provides on-demand clean contaminant-free water for household use. And it is very much affordable. The softening and water filtering operations are executed in 3 distinct stages. The first stage utilizes a polypropylene 5-micron sediment filter while the 2nd & 3rd stages make use of a pair of 5 micron CTO carbon block filters.

The iSpring WCC31 under sink tankless filter has a standard transparent housing. This facilitates better visual inspection of the health and status of the filters. The entire system includes a feed water adapter that brings cold water to iSpring WCC31 for filtration. Drinking water faucet takes water away from the system to your household line for use.

Why We Like It:

  • It has a simple installation process, thanks to an included user manual with complete instructions on the same
  • It is self-sustaining under sink water filter that requires no connection to the mains electricity.
  • Supports fast flow rate of up to 8 GPM at a pressure of 60 psi.
  • Supports 3 stage filtration process effected by a sediment filter and 2 CTO carbon filters.
  • Removes all forms of water contaminants; sediments, chlorine, and other chemical contaminants.

Why We Hate It:

  • No product warranty.

Best 2-Stage Under Sink Water Filter

  • Aquasana 2-stage under sink water filter system

Aquasana tap water filter is one of the best market brands. It is well known for its tested and proven record of eliminating 99% of common water contaminants. Unlike some other water filters, this one is resource efficient and wastes absolutely no water. Besides, it has one of the best-rated water filtration systems that adds absolutely no contaminants to your water. With an estimated filtration cost of roughly 10 cents per gallon, this under sink water filter provides your entire household with clean water at only a fraction of the total cost. Integrated Claryum filters help retain essential mineral salts like calcium, potassium, and magnesium.

Has a range of all-metal faucets of one’s choice to match your particular kitchen decor.

Why We Like It:

  • It is NSF 42, 53, 401, and +P473 certified for quality performance, safety, and durability.
  • Includes a range of 100% lead-free stylish metallic faucets that matches one kitchen decor.
  • DIY installation process. You won’t require a plumber
  • Claryum filters help retain essential minerals salts like magnesium, calcium, and potassium.
  • Supports 2 stage water filtration and is capable of removing 99% of all chemical and solid water contaminants.

Why We Hate It:

  • No product warranty

Best Sanitary Quick Change Cartridge Filter

  • The 3M Aqua-Pure under sink water Filtration system

Eliminate awful odor, chlorine, sediments, and other contaminants with a high-performance water filter, 3M Aqua-Pure under sink water filter. It is also NSF certified for quality performance and safety. It is compact and lightweight thus installs easily under your sink with no much strain and hassle. This is one of a few options in an entire product portfolio credited with the provision of cleaner and better tasting drinking water. It has a universal system design that makes it ideal for use to treat both municipal and well water.

Why We Like It:

  • NSF certified water filter for sink capable of eliminating 99% of water contaminants.
  • The design of this water filter makes it ideal for treating chlorinated tap water and non-chlorinated well water.
  • Filter adapter connects directly to your bathroom or kitchen faucet for full flow water filtration.
  • Has a 3M Sanitary Quick Change (SQC) cartridge design facilitates fast and simplified cartridge change.
  • Uses advanced triple stage carbon-block filtration technique for a cleaner and sweet tasting water.

Why We Hate It:

  • No warranty coverage.

Best Budget Under Sink Water Filter

  • EcoSoft 5 stage Reverse osmosis water filtration system

EcoSoft reverse osmosis filtration system comes last in our list not because it is the worst, no. in fact it could very well be the best of all. We just decided to bring it at the very end in order to surprise you. Like most reverse osmosis filters, EcoSoft under sink water filter is capable of removing up to 99% of all water contaminants. Has a 5 stage European RO water filtration system, this equipment effectively eliminates all contaminants thus ensuring safe and tasty water for an entire household. It uses a patented Ecomix Technology to remove chemical, physical, as well as biological contaminants. This is one of the simplest to install under sink water filters. It fits anywhere, bathroom or kitchen.

Why We Like It:

  • Simple and direct installation procedure. There’s a user manual to help with the same.
  • Features a stylish faucet that matches your kitchen decor
  • Patented Ecomix technology removes all chemical, biological, and physical water contaminants.
  • Quality water filtration with a capacity to release up to 99% of over 1,000 harmful water contaminants.

Why We Hate It:

  • No product warranty.

What you should consider when shopping for an under sink water filter?

When it comes to choosing an ideal water purifier, there are a number of aspects to consider. Some of these may include.

There are a couple of things to consider when it comes to choosing an ideal water filter for sink. Some of the aspects to consider include:

  • Filtration rate
  • Ability to eliminate water hardness causing mineral ions; magnesium and calcium.
  • Which contaminants is it able to eliminate.
  • The frequency of filter replacement and associated cost
  • Does it accumulate waste water?

Conclusion

That is the end of our detailed review of the best under sink water filters. Be sure to compare and compare the various products enlisted in order to get the best filter for your household or office setting.