Under Sink Water Filtration System

Best Under Sink Water Filter System: Reviews and Guide

Tired of drinking weird-tasting water from the tap? Your dishes end up all dirty after washing? Do you smell something weird in the water? Then it probably means that the water reaching your house is not the cleanest. 

That’s why you must get the best under sink water filter. Just place it below the counter, and it will filter all the water going to the tap. Whether it is for cleaning, washing dishes, or cooking food – it will make the water as clean as you can imagine.

We decided to bring the most reliable and well-made filters in the market and teach you how to pick the right one. 

Care to learn what we have for you? Then keep scrolling!

7 Best Under Sink Water Filters Reviews

There were hundreds of models available. But few of them truly met our standards in terms of quality and popularity. Those were the ones we picked for these reviews. Here’s what we found about them:

1. iSpring RCC7AK High Capacity Under Sink Water Filter 

The first model in our list is the iSpring RCC7AK – a top rated under sink filtration system that will blow your mind away.

The RCC7 line from iSpring stands out for the ability to get rid of over one-thousand contaminants. You won’t have to worry about asbestos, lead, mercury, sodium, arsenic, fluoride, or even lead to reach your tap – everything will stay on the filter.

It boasts a unique RO membrane that gets rid of all the pollutants and minerals behind. The Alkaline Remineralization or 6th stage mineralizes the water back, making it drinkable and super healthy. And those are merely the last stages. In the previous 4 stages, the machine will clean the water thoroughly.

Despite all that, you still get a European-style kitchen with the system. And sure enough, the whole piece is a piece of cake to install.

You get the beautiful sink, the straightforward installation, and a top-notch filter for next-level water delivery. Is there any way to get better than this? 

Well, iSpring also offers one of the best technical supports in the market. So if you ever have a problem with its filters – you can be sure they’ll help you out from the first moment. 

Highlighted Features:

  • 6-stage for super effective filtration
  • Unique RO membrane & remineralization system
  • European-style sink as an extra
  • Easy installation despite its huge size
  • Top-level support from iSpring

2. Woder WD-S-8K-DC Water Filtration System

Writing reviews about filtration systems and not adding a Woder water filter should be a crime.

That’s why the WD-S-8K-DC is on here. One of the most effective filter systems for high-capacity sinks, capable of working at up to 2GPM without problems.

The filter is also fantastic for its lifespan, letting through about 8,480 gallons of water. That’s enough to last at least 3 years in a typical household sink.

Still, the real advantage comes from the amazing filtration. It uses a selective system that removes 99% of all contaminants without getting rid of the minerals. The reverse osmosis system is just the best at that.

This goes well with the safe-taste certification. You won’t have to worry about odor or lead and chlorine residues, it gets rid of everything. 

And with the super-fast Direct Connect hoses, you can connect the whole system in minutes. No need to call a plumber or mess up your entire countertop to install it.

Last but not least, it is super small and fits almost anywhere. Alongside the cheapest price tag in the list – you’ll have the Woder as the best low-price option available. This is an offer not to dismiss. 

Highlighted Features:

  • Small and simple design fits anywhere
  • Processes up to 8,480 gallons total
  • Excellent water-pressure capacity at 2GMP
  • An easy-to-install system with Direct Connect hoses
  • Ultra-cheap despite the great quality


Another fantastic brand to consider is Express Water. And with the Reverse Osmosis system this filter offers, you get no less than exceptional results.

You will purge up to 99% of all contaminants – going from nitrates to bacteria, lead, chlorine, and more. And it all comes down to its 5-stage system, starting with the standard filters like granular carbon, standard carbon block, and a sediment filter. 

Then you get the chance to enjoy the RO filter, which gets rid of all the other contaminants and even minerals, making the water ultra-clean. And with the coconut carbon filter for last, you get the touch of healthiness to enjoy next-level water.

This set also boasts a tank for the reverse osmosis and a sink. You get the chance to enjoy easy installation with the Quick Connect system as well – making it ultra-practical. 

All of that matches well with the emergency leak detector, which stops leaks and tells you where they’re happening. You won’t have any problem finding issues when they happen.

Overall, this is a filtration system for demanding users who want the best of the best.

Highlighted Features:

  • A highly effective 5-stage system
  • Next-level reverse osmosis filter with tank
  • Easy-to-install with Quick Connect design
  • Practical emergency leak detector 
  • Added chrome faucet for extra convenience

4. Home Master TMAFC-ERP-L Artesian Under Sink Water Filter System

When it comes to making your water drinkable, few filter models will match your demands like the Home Master TMAFC-ERP-L Artesian does.

It boasts the helpful modular filter system with 7 stages. That’s enough to get rid of even the smallest particle – going from chlorine to lead, TDS, and more.

The whole system is also super healthy. It doesn’t only clean the water thoroughly, but it also adds minerals like calcium and magnesium back, so you get great-tasting but also safe & rich water.

This wouldn’t be possible without the high-rate pump. The system can handle high pressure, so it works practically on any sink without problems. A totally non-electric pump makes it all possible while reducing waste and preventing common issues.

If that wasn’t enough, the system still boasts a beautiful brushed nickel faucet. The whole filtration set is a piece of cake to install with the Full Contact feature. And you get a reverse osmosis tank system for extra cleanliness – flavoring your water from now on will be a total pleasure.

For those who don’t want to waste a single dime of their money, the Home Master Artesian will come like the ideal choice. From the mineralization to the high flow rate and the top-notch 7-stage filtration – this system will surpass all your expectations. 

Highlighted Features:

  • Super effective 7-stage filtration
  • Reverse osmosis filter with a tank for high capacity
  • A non-electric pump delivers proper pressure and reliability
  • Beautiful faucet with brushed nickel finish
  • Full Contact function for easy installation

5.  Frizzlife MK99 Under Sink Water Filter System

Another model we couldn’t leave behind was the Frizzlife water filter. With the MK99 model, this brand can surpass even the highest of expectations – getting rid of all contaminants in minutes.

The filter operates at 2GPM – strong enough to get your water fast into the sink. Thanks to how straightforward this filter is, you can start using it in just minutes. The water goes through it in seconds, and the water will get out super-fast and clean from the faucet.

It also comes with a unique auto shut-off feature. You won’t have to worry about replacing or installing the piece and making a mess – it shuts down by itself. This goes well with the straightforward twist-in installation – so you can hook it up in minutes after getting it.

Thanks to how small it is, you can place it almost anywhere – as it takes little space and is almost invisible under the counter. Alongside its compatibility with 3/8 and 1/2 fittings – you won’t have any problem setting it up.

The filter lasts a long time still, and you can set it up later with a bigger multi-stage system from Frizzlife if necessary. When it comes to convenience, few models reach such a high level.

Highlighted Features:

  • Highly compatible with different fittings
  • Fast & straightforward installation 
  • Excellent flow rate capacity for any sink
  • Decent filtering results for the size
  • The ultra-practical design fits almost anywhere

6. Express Water UV Water Filtration System 

Coming back to Express Water – we now find the UV Water Filtration System. It has everything from the carbon block to the granular carbon, and even the sediment filter.  You also find the reverse osmosis and the re-alkalinization filter, for mineralizing the water. 

Yet, the true advantage comes from the UV filter. Not only you get rid of the most common contaminants like chlorine and nitrates, calcium, bacteria, lead, arsenic, and so on. In essence, you also get rid of viruses and highly dangerous diseases on the water.

Everything from E.coli to microorganisms, small squishy viruses, and other potentially harmful stuff – it will be eliminated by the UV filter. So you get an excellent 7-stage filter that delivers no less than almost-perfect results.

Despite all that, you get a Quick Connect system for easy installation, a practical design for easy setup, and an automatic system that fills itself so you won’t have to activate it. Alongside the leak-detection system, this filter will meet even the highest standards with ease.

You also get a pressure gauge so you can read pressure, a 0.8 GPM faucet for effective water delivery, and the reverse osmosis tank for next-level cleaning. It is probably the most complete filtration set you will find. 

Highlighted Features:

  • Fantastic filtering capacity with 7-stage system
  • Effortless installation with Quick Connect design
  • Unique UV filter for superb cleanliness
  • Leak-detection system makes it easy to troubleshoot
  • Ultra-convenient set of extra features 

7. AMI Home RO WaterAnywhere Under Sink Drinking Water Filter

Last but not least, we had to bring an Applied Membrane filter –the best under sink reverse osmosis system in the list.

You get a top-notch reverse osmosis filtration process in 5 stages. It gets rid of even the smallest particles without making much of an effort.

First, it starts with a 5-micro sediment filter – cleaning everything from sand to dust and rust. Then, it goes through a standard carbon block and a granular block, removing any type of smell, taste, and chlorine in the water.

In the 4th stage, it passes through the reverse osmosis membrane, removing 99% of all the remaining contaminants. And when it goes through the 5th stage with a coconut shell system, it gives the water back some of its mineral, flavor, and filters the last residues out.

All of that comes with the faucet and a pretty neat & decently compact design that fits under most countertops. So you get the chance to save time, effort, and even money in the process while enjoying next-level filtration. Isn’t that amazing?

When it comes to quality filtration without leaving a single-stage behind, the AMI Home RO Membrane Filter stands out.

Highlighted Features:

  • Exceptional filtration with 5-stage system
  • Reverse osmosis system cleans like no other
  • The well-made design makes it compact & practical
  • Easy to install despite top-notch filtration
  • Comes with handy faucet for less hassle

Under Sink Water Filter Buying Guide

After reading our under sink water filter reviews, you’re ready to take the next step – finding out exactly what you need.

So here are some factors to consider so you can know that:

Filter Stages

Most filters come with several stages to consider – others do not. 

Sure enough, the ones with 2 or more stages are often the best at cleaning the water, but they’re also a little more expensive and harder to install.

For the best filtration, however, we recommend going for filters offering at least 5 stages. That would be two carbon blocks, a sediment filter, a reverse osmosis filter, and the last filter for alkalinization or giving water back its taste. 

But that doesn’t mean a one-stage filter is a bad choice. If the water at home tends to be pretty clean and you just need to clean a little – then one stage will be enough. 

Still, nothing compares to having 5 stages or more – especially those with UV filters and additional filtration capacity – they will make water way healthier than anything you can think of. 

So it all comes down to your needs. The dirtier the water is at your home, the more filters you’ll want to have. For a decent experience, a 3 or 5-stage filter will suffice. 

Setup & Maintenance

Setting up the system shouldn’t be much of a problem. That’s why you must consider the smallest options, but also the most convenient.

We usually recommend those with unique connectors and/or easy-connect designs. And if the filter manages to save some space in the process, then that’s even better – so you can set it up wherever you want. 

Otherwise, you may end up with a bulky and tricky-to-install filter that demands a lot of time and effort to set up. And you probably don’t want that.

The same happens when replacing the cartridges once they wear out – you want the process to go neatly and quickly. So you should go for the easiest-to-maintain filtration system as possible.

If you don’t need to waste more than 10 minutes changing a worn-out filter, then that’s a model to consider. 

In short, go for a filter that makes it easy to install and maintain when necessary. You won’t have to waste time or effort when tweaking it.

Cartridge Longevity

Following the maintenance ease, you’ll want a filter that has long-lasting cartridges. That’s why we recommend those that can last the most time without changes.

Some filters can last between 6 to 12 months. Others can last up to 5 years. Sure enough, the more long-lasting the cartridge, the better it is.

But most of the time is not about the overall time they can last, but how much water they can process before they wear out. We typically recommend models that can handle at least 3,000 gallons of water in their lifespan, but some can reach up to 8,000 or more – which makes them last 3 years at least.

If you’re looking for a filter to install in your restaurant, for example, then you need a high-capacity filter that handles a lot of water. So a 5,000-gallon capacity will be the least you can pick. 

Water Pressure & Flow Rate

Then you fall into the water pressure & flow rate of the filter. The more pressure the filter has, the faster the water will run through the system.

This won’t necessarily change the filtration quality, but it can affect how fast the water goes out of the faucet. That’s why we recommend no less than 2 GPM for a decent experience. 

If the filter offers more GPM, then you will probably get a lot more speed and flow rate. This means it can process a lot more water faster. So be sure to get something decent enough for your needs.

For a restaurant, for example, filtration quality with speed is super important – so a high-GPM system will be essential. 

It is also important to remember that the more stages the system has, the less the flow rate & pressure it offers. So be aware of that before choosing.


Last but not least, you have to consider any extra feature that comes with the system.

Here you can find faucets, pumps, connections, and other extras that make the whole filtration a lot more convenient, easier to install, or more effective. 

The more extra features you get, the better the system will be. So don’t hesitate to get a filter that offers accessories or additional devices to enjoy. 

5 Popular Under Sink Filter Brands: Which One to Suggest?

Apart from being aware of the most important factors, you also need to learn about the most popular and reliable brands. Otherwise, you won’t be able to get the best under sink water filtration system for your needs. Here are 5 brands to consider: 


The first brand to think about will be iSpring. We love this brand for many reasons, mainly because it offers the most complete filtration systems in the market.

This family-owned company is located in Georgia, and it focuses on providing next-level filters. So you can guess the brand produces craftsman-like products that surpass even the most demanding expectations.

Apart from that, iSpring stands out for its quality customer service. You won’t have any problem calling them if you have a problem. And sure enough, they offer an excellent warranty of 1 year. Yet, you can extend it up to 10 years if you want – adding the extra reliability only top-notch brands offer.

If you want to know a high-quality brand that doesn’t disappoint – iSpring is the way to go. 


One of the youngest yet most popular brands in the market is Woder. Pronounced just like water, you can guess this brand wanted to enter the market and bash the competition. And it comes close to that.

Every product from this brand is super affordable, yet it delivers top-notch filters for incredible results. And sure enough, all of its filters stand out for how easy they are to install and how fast they work.

They’re also based in the US and offer excellent customer service. Whatever problem you have, they will not let you down. 

Woder is not as prestigious as other brands in the list, but it’s still worth the investment – mainly because they offer innovative features that you won’t find anywhere else. 

Home Master

Home Master focuses on delivering problem-free filters over anything else. You will get the chance to install the system and let it work without a single worry. 

You will find that Home Master also delivers excellent filtering without leaving extras behind. Not only it focuses on cleaning your water thoroughly, but you also get extra features that not many other brands offer.

Sure enough, Home Master doesn’t let anyone down in terms of ease of use. Despite their extra features, you can still enjoy straightforward installation and maintenance.

And lastly, they offer an excellent warranty for up to 5 years. That ensures a worry-free experience for a long time. 

For those who want reliability over everything else – Home Master comes like an excellent choice. 

AMI (Applied Membranes)

Founded in 1983, AMI or Applied Membranes is one of the oldest in the list – and one of the most quality-oriented. 

It employs hundreds of professionals that produce quality results in every product. So you expect AMI filters to be of the highest quality out there.

Most of the components this brand uses are made in the same facility, making every product amazingly reliable and well-made.

Following the expertise this brand has alongside their focus on quality results, you can expect no less than amazing filtering and long-lasting components.

You get both the performance and the quality that filtration systems should have – so it is not a brand to dismiss. 


Coming to life with the sole purpose of revolutionizing the market of filtering systems, Frizzlife focuses on small yet effective filters for any purpose. 

Getting a Frizzlife filter means you’re going to save a lot of time and effort in installation and maintenance. 

Even the largest model from this brand focuses on ease of use and convenience – so you can guess how dedicated this brand is to revolutionize the market.

At the same time, they offer decent customer support. And with the 2-year warranty on all of its products, you won’t have a single thing to complain about. This gets even better if you’re a registered customer, as they can make the warranty even longer at 3 years.

When it comes to innovation, Frizzlife is the one that stands out. 

Express Water

Lastly, we have to talk about Express Water. It delivers some of the most complete and performance-oriented models. And every product manages to clean water thoroughly – so even the dirtiest of water delivery goes out the tap super-clean and ready to use.

The brand doesn’t disappoint in results, but it also manages to make its systems super practical. Even the biggest and most results-oriented filter from this brand will be a piece of cake to install. 

If you want quality filtering with simple installation, this brand is your go-to choice. At the same time, they won’t let you down with a 1-year warranty as well as top-notch customer service for any problem you have.

Advantages of an Under Sink Water Filter

Getting the best under counter water filter is not just about filtrating water, but it also comes down to many other advantages. Here are some of them: 

Water Taste & Quality

Because they can process water just before they get into the tap, these filters deliver excellent taste, no odor, and overall cleanliness. The water goes out free of contaminants but also tasty and ready for any purpose – so you can enjoy next-level water delivery in your kitchen. 

Little Space Needed

You don’t need to have a large countertop to install one of these. Even the largest under-the-counter filter takes just a few feet of total storage space – and that’s something you don’t get with whole-house filtration systems.

Easy Installation & Maintenance

Following how small they are, you can guess how easy they are to set up. Just a few minutes is enough for most systems. And when it’s the time to replace or fix an issue, that’s even easier. The days of hiring a plumber will stay in the past.

Super Affordable

When you look at prices of larger filtration systems, you realize how affordable these are. While others can reach up to several thousand, under-the-sink filters barely meet a couple hundred bucks. And they end up being more efficient and cheaper over the long term.

Different Options

Lastly, you have the chance to pick several types and models. So there’s not a single option to go for – but a wide variety of under-the-counter filters you can pick. They go from 1-stage to 3-stage, up to 7-stage filters as well as those with reverse osmosis, UV filters, and more. There’s one for every purpose.

We need water in our every step of the way in the kitchen – in cooking, washing, cleaning or even for drinking. The kitchen sink is the most used appliance of our home.

We don’t just use it when cooking, but for normal uses too. We drink from it, make ice with it; sometimes, we turn it into a small bathtub to bathe babies!

No one really thinks about what goes inside the mechanics of a sink. We turn on the faucet and water comes out: hot and cold – whatever we need for the occasion. How many times do we actually stop to think about exactly where the water is coming from, and what is being done to it?

What is an Under-Sink Water Filtration System?

In most homes of the United States if America, a special filter is installed for the kitchen that is usually placed in the cabinets under the sink. This technology wasn’t really necessary or thought important even a few years ago, but now, almost every home has a water filtration system installed in the kitchen.

Water isn’t really safe to drink to cook without it being treated in a personal filtration system in the house.

Even though there are water treatment systems in all the cities of the United States, the water that reaches our homes aren’t 100% safe, at least not for drinking directly. A simple filtration system in our own kitchens can make it drinkable, even for children.

Why are they fitted Under the Sink?

These under-sink water filtration systems are rather large and not very aesthetically pleasing. Most of them come with complicated machineries and numerous wires – all the best to hide them under the sink.

Besides, under the sink, they have easy access to the house’s water pipes and lines, as well as easy-to-reach when the filters need changing or when there is a problem with the system.

How does an Under-Sink Water Filtration System work? 

The water that reaches our home from the local water treatment centers can be sometimes accompanied by lead, hormones, arsenic and other such unwanted contaminants.

While these pollutants are not very harmful in the other parts of the house, consuming them – directly or after cooking – can lead to a number of short-term and long-term health problems. With a water filtration system installed under your sink, the water that comes to your kitchen faucet can be as pure as is possible.

These water filtration systems do not store any water and they don’t have a storage tank. No water is used up in the process.

The amount of water that goes into the filter is cleaned and sent up immediately to the faucet as usable water. No wastewater is produced and this filtration system doesn’t need to be attached to a drainage system.

What are the different types of Under-sink water filtration system? 

There are basically two types of water filtration systems that are used in our homes for the kitchen: a conventional one and a simple one.

  • A conventional under-sink filter receives cold water from the home’s main water system and sends it to the water filter via a plastic tube. Inside the filter, the water is cleaned in two stages and then instantly delivered to the kitchen faucet to the user.

    This system is used for normal drinking water only and works constantly, whenever the user turns the faucet to get water. This is a separate line in the kitchen sink that remains independent of the hot-and-cold water faucet on top of the kitchen sink.
    This filtration system only uses the water source under the sink, but the outlet is different.

  • A simple under-sink filtration system, on the other hand, the kitchen’s main cold water supply is filtered via the system and delivered to the main cold water outlet of the sink.
    The hot water supply isn’t filtered since heated water is usually safer than regular water. This is the type of filtration system that is mostly used in homes these days.

Comparison between different filtration systems 

A simple filtration system is the one used in most homes because it is easier to install. It also happens to be less expensive to purchase and install, and can be used anywhere, not just under the sink.

However, with a simple filtration system, the cartridge needs to be replaced more times than in a conventional system. At the same time, a conventional filtration system can be installed in any setting under the kitchen sink, both copper and flexible pipping, but a simple system can only be installed where the connectors are flexible.

Even after undergoing treatment, it is not completely safe to use the water we get in our home for directly drinking. There are so many unwanted pollutants that come with our water that could lead to health issues in the future.

With just a simple step – i.e. installing a water filtration system under our sink – we can stay worry free about our drinking water. We can choose either one for our homes – a simple or a conventional filtration machine, and drink much safer and cleaner water.


So, are you ready to get the best under sink water filter? So put your brain into work and start finding out which model is your best bet.

We recommend the iSpring RCC7AK High Capacity Under Sink Water Filter as the most complete in the list. Yet, you may also want a convenient Woder WD-S-8K-DC Water Filtration System. It all comes down to your needs. 

With our recommendations and buying guide, you shouldn’t have a problem picking the right one.

Pick one of these under-the-sink filters today, and you’ll enjoy the most practical systems in the market. Don’t drink dirty water ever again, or make your food smell awful before cooking. These filters make all that possible. 

So, what are you waiting for?

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