Best Under Sink Water Filter For 2022

An under sink water filter is an ideal way to ensure that you get clean drinking water at home when you need it. The filter cleans water just before it gets to your faucet. It also eliminates the need to purchase plastic water bottles for home. But which is the under sink best water filter? Keep reading as we guide you in choosing the best under counter water filter.

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3 Best Under Sink Water Fiters

The Best Water Filters For Under The Sink

What Is An Undercounter Water Filter?

An under-counter water filter is a filter you install at the point of use (POU). You install the water filter exactly where you need clean water.

Undercounter filters are in-line filters, which connect directly to your waterline. Water passes via the filter to the faucet. Undercounter water filters are a popular water treatment solution for many homeowners.

Water may be suitable for other household chores such as bathing and laundry but may not be ideal for drinking or cooking. In such a case, a whole house water filter may not be necessary.

There are several types of water filters, which include:

Activated Carbon

Activated carbon is good for absorbing organic substances, agricultural chemicals, sediment, magnesium, chloroform, and chorine. The key to how activated carbon works is absorption. Water contaminants stick to the carbon as they pass through the filter.

Ion Exchange

Ion Exchange is suitable for removing radioactive material and hard water. This type of filter has a substance that exchanges ions as water passes through.

Reverse Osmosis

Reverse osmosis is ideal for a high percentage of contaminants. As a result, this type of filter is prevalent. It uses pressure to push water via a reverse osmosis membrane, leaving contaminants behind.


Mechanical filters use the pre-filtration method, which is ideal for matter waste and physical properties. Water flows through a mechanical filter leaving behind waste material. This filter is a type of sediment filter and is suitable for a well water filtration system.

Ultra Violet Filter

This type of water filter is ideal for removing viruses and bacteria. They use ultraviolet light at different frequencies to clean water.

Best Undercounter Water Filter

Best Under Sink Water Filter Systems
Best Under Sink Water Filter System

There are so many under counter water filters available in the market. These filters vary in terms of efficiency, filtration type, capacity, size, and maintenance needs. Furthermore, there are also different models and brands from various manufacturers.

With so many types, brands, and models of under counter water filters, it may be challenging to decide the right filter for your home. Here are the best under sink water filters to help you narrow down your options.

APEC Water Systems Reverse Osmosis Drinking Water Filter System

This reverse osmosis drinking water filter has supreme quality, design, and engineering, guaranteeing safe water for your health. The Water Quality Association (WQA) has certified the filter to provide unlimited clean and refreshing water superior to bottled water.

The filter is also long-lasting and will remove up to 99 percent of water contaminants, including taste, smell, chlorine, and heavy metals. The water filtration system includes a 100 percent lead-free faucet and certified food-grade tubing.

The filter also comes with fittings that are easy to connect, leak-free, and do not need lock clips to seal leaks. In addition, the filter comes with instructions and videos, which ensure that you have a trouble-free DIY experience.

iSpring Water Filter

iSpring water systems use a reliable and safe reverse osmosis water filtration system to clean water. The system will restore the natural mineral balance and alkalinity. In addition, the filter converts water into pure, healthy, and clean drinking water by removing over 1,000 harmful contaminants.

The filter has a transparent first-stage housing for easy and quick visual inspection. Three long-life pre-filters protect the reverse osmosis membrane by removing large contaminants. Finally, an ultra-fine filter removes tiny contaminants, while a fine GAC filter does the final polishing.   

This water filter is designed for DIY installation; hence it is easy to install and has no leaks. In addition, there is a detailed instruction manual, installation videos, and access lifetime support.

3M Aqua-Pure Whole House Water Filter System

This Aqua pure water filter is a whole house water filter, which reduces chlorine taste, odor, and sediment build-up. Ultimately there is an increase in the life of home appliances such as water heaters, dishwashers, and clothes washers.

The 3M water filter has a capacity of 100,000 gallons at high flow rates of 10 and peak flow rates of 20 gallons per minute. The replacement cartridge has an activated carbon filter with a heavy-duty particulate reduction rate of 5 microns.   

The cartridge has a sanitary quick change (SQC) design, making it easy and fast to change without using a filter wrench.  

Express Water Reverse Osmosis Alkaline Water Filtration System

This alkaline water filter uses the reverse osmosis water filtration system to filter over 99 percent of water contaminants. The filter has an active mineral technology, which adds magnesium, potassium, calcium, and other minerals to the water.

The express water filter does not require professional installation. The quick and easy-to-understand design is ideal for a DIY installation. Connection fittings ensure that the filter is easily upgradable and customizable.

The under sink water filter has an emergency leak stop detector that ensures there is no mess. The detector will shut off water flow once it notices unwelcomed moisture.

Aquasana Under Sink Water Filter System

The Aquasana under sink water filter instantly transforms ordinary water into pure and clean drinking water. The filter can reduce up to 99 percent of 77 contaminants. However, the filter cannot decrease Total Dissolved Solids (TDS).

The filtration system has a high flow rate of half a gallon per minute; thus, there is no need to wait like traditional drip filters. The filter has a capacity of 800 gallons, which can last approximately six months before replacement.

Filter replacement is straightforward, and there is no need to disconnect water lines or hoses. An eco-friendly housing twists off easily; thus, no need for a plumber.  

Is An Undercounter Water Filter Worth It?

Water gets easily contaminated and could even get contaminated as it gets to the faucet. The water may be clean, but contaminants may ruin its smell and taste. An under counter water filter cleans the water just before it gets to the faucet and is the best option for the best water quality for cooking and dinking.

Undercounter water filters are also convenient, easy to maintain, and quick. If your home consumes more than a few gallons of drinking water in a day, then an under sink water filter is appropriate for you. Under sink water filters clean the water on demand without waiting around for the filtration process.

Finally, using an under sink water filter is a great alternative to buying bottled water. Plus, they save money. Over the lifetime of an under sink water filter, the cost-saving compared to buying bottled water adds up.

What Features To Look For In An Under Counter Water Filter

Under Counter Water Filtration Systems


Different types of filters have varying maintenance needs. You don’t need a filter that will require a plumber frequently.

Ease of Installation

An ideal under-the-sink water filter should have a DIY installation procedure that does not require a plumber or professional.

Type of Filter or Filtration System

The type of filter and the filtration system it uses should be ideal for the kind of water available in your home.


The space available under your sink will also determine the type and size of the water filter. The filter should easily fit in the space without the need for any modification.


The amount of filtered water you need will play a crucial role in determining the ideal type of filter for your home.

Types of Contaminants Filter Will Remove

The type and number of contaminants that a filter removes are the keys to ensuring that you get clean and pure drinking water in your home.

An under sink water filter plays a crucial role in ensuring that you have a constant supply of clean drinking water. Use this guide to ensure that you get the ideal filter for your home.

FAQs – Under Sink Water Filters

Do under sink water filters work?

Yes, they do. Under sink water filters are increasingly become the norm in homes. From reducing single use plastic bottles to the simple convenience of clean, pure water under the sink water filters work and work well.

Is a sink filter worth it?

100% yes! While the initial cost of a sink filter may seem too high, over their lifetime, a sink filter will pay for itself and then some. There’s also a positive effect on the environment by eliminate plastic water bottles.

How much does it cost to install under sink water filter?

If you have the DIY skills to install an under sink filter, the costs to install will be minimum. However, a professional installation can run between $300 to $1,000.

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