Best Under Sink Water Filter Reviews – Inline Comparison

If you don’t have a whole-home water filtration system or you just need to add an additional water filter to your kitchen, installing an under sink water filtration systems is a great way to make sure your water is safe and pure.

As the name suggests, this type of filter is designed to fit in the cabinet underneath the sink, so you don’t have to look at unsightly tubes, wires, and canisters. Finding the best under sink water filter, however, can be a bit of a challenge.

That’s why we’ve put together a list of some of the best under sink water filter reviews to help you choose the system that works for you.


Nahla Pure Under Sink Direct Connect Water Filter

Nahla Pure Under Sink Direct Connect Water Filter

The Nahla Pure Under Sink Direct Connect Water Filters is one of the best inline water filters on the market. It eliminates the need to install specially designed faucets or find room for clunky water-filtering pitchers.

In addition, the filters on this system only need to be replaced every 10,000 gallons or three years, which is 18 times more filter life than pitcher filters and, impressively, a longer filter life than most whole-home system filters.

This filter removes 99 percent of contaminants, including VOCs, chlorine, lead, and more. It’s also easy to install as it connects directly to standard 3/8-inch cold water lines, so you have fresh, cold water that comes right from your tap.


Woder Ultra-High-Capacity Direct Connect Water Filtration System

Woder Water Filtration System

This is one of the best under counter water filters available if you already have municipally treated or disinfected tap water. Featuring NSF approved materials, it removes 99.99 percent of contaminants, including chlorine, foul tastes and odors, lead, and heavy metals, while leaving in the essential minerals that make water taste fresh and crisp.

Like the previous filter, this one will last for up to 10,000 gallons or three years and connects directly to a water line to provide you with fresh water from the tap. This system includes easy-to-install instructions and can be set up in as little as five minutes, making it one of the best sink water filters on the market.


Culligan EZ-Change Under Sink Drinking Water Filtration System

Culligan US-EZ-1

The Culligan man is at it again with the best sink water filter. This filter drastically reduces the bad tastes and odors that are often associated with poor water quality. It also removes the taste and smell of chlorine as well as class III particles. Each filter can purify up to 3,000 gallons of water before it needs to be replaced, and when it does, the EZ-Change twist-on, twist-off mechanism allows the user to change the filter in just minutes.

This system also features a double water shutoff and quick-connect fittings to make sure the filter stays in place and to reduce leaks and spills, making this system one of the best under sink water filtration systems money can buy.


APEC Top-Tier Ultra-Safe Built-In USA Reverse Osmosis Drinking Water Filter System

APEC Reverse Osmosis Drinking Water Filter

If you’re looking for a great under sink water filter that uses reverse osmosis technology, the APEC Top-Tier Ultra-Safe Built-In USA Reverse Osmosis Drinking Water Filter System is a great option. This under sink systems removes up to 99 percent of contaminants such as arsenic, lead, and even bacteria and viruses.

It offers quick-connect fittings, eliminating the need to use lock clips or seal leaks, as well as easy installation and maintenance. If you have problems, the company’s trained WQA certified water specialists are there to help. The virtually noise-free reverse osmosis filtering process is sure to provide you with great-tasting drinking water.


iSpring 5-Stage Residential Under-Sink Reverse Osmosis Water Filter System

iSpring RCC7 Water Filtration System

Like the previous product, this under sink water filter system also utilizes reverse osmosis technology. Even better, this system has earned the Water Quality Association gold seal for exceptional safety, quality, and durability. This under sink system filters water through five stages to remove up to 99 percent of contaminants and pollutants, including dangerous chemicals like arsenic and pesticides.

Even though it features a complex reverse osmosis system, it’s small enough to fit underneath just about any sink. This small but powerful system has a rating of 75 gallons per day, providing you with fresh water whenever you need it. Last but not least, this under sink water filter includes a beautiful brushed-nickel, lead-free, solid brass faucet to provide a clean, finished look.


Finding the right under sink filtration system for your household can sometimes be tricky, which is why we created this list of some of the best under sink water filtration systems. Each of these featured products successfully remove most harmful contaminants from your drinking water.

If you choose one of the first two products, you won’t need to install a new faucet because it connects directly to your water line; they also have one of the longest possible filter lifespans of three years or 10,000 gallons. The third product allows you to quickly and easily change the filter in minutes with its EZ-Change technology. The fourth and fifth under sink water filter systems filter water using reverse osmosis technology to ensure that you have access to the safest drinking water possible.