5 Best Reverse Osmosis Filter Systems for Your Kitchen

Although it is one of the most abundant natural resources in the world and is essential for survival, water has not always been safe for consumption. At many points throughout human history, water has caused diseases and suffering due to contamination. 

These days, this has become considerably less of a concern, thanks to the modern treatment technology for water. However, this doesn’t mean that there aren’t any problems anymore hiding in your regular glass of water.

As a result of certain treatment processes or other factors, the water that is fed through indoor plumbing can contain contaminants. These include chemicals, metallic particles, and more which could pose an issue to you and your family.

This is why tools like these five reverse osmosis (RO) filter systems that are featured here have become a necessity. If you truly want pure drinking water that is safe to consume, you’ll want to check out this list we prepared for you.

Best Reverse Osmosis Filter Systems Comparison & Rating

Want to Learn More?

Before you decide which reverse osmosis filter system to buy, you might want to find out more about the best options available. This is to make sure that you will absolutely enjoy the reverse osmosis filter system that you would get for your kitchen. Also, be sure to click the yellow buttons below to see their best deals on Amazon! With that, here are five of the best options that we rounded up especially for you.

iSpring RCC7AK 6-Stage Reverse Osmosis Drinking Water Filter System

iSpring RCC7AK 6-Stage Superb Taste High Capacity Under Sink Reverse Osmosis Drinking Water Filter System with Alkaline Remineralization-Natural pH, White
Specifications

Dimensions

15 x 8 x 18 inches

Weight

20 pounds

Color

White

Package

RO System, Brushed Nickel Faucet, and Storage Tank

Rating: 95% Overall
96%
efficiency
97%
flow speed
93%
installation
94%
quality
Pros
  • This is designed to restore the natural alkalinity and mineral balance of water.
  • Removes up to 99% of over 1, 000 harmful contaminants.
  • The system includes an additional sixth filtration stage that gives a more natural water taste.
  • Includes a European-style faucet.
  • Comes with a transparent first-stage housing for easy visual inspection.
  • The ultra-fine filter removes contaminants down to 0.0001 microns.
  • The system is designed for DIY installation.
  • Comes with written instructions and instructional videos.
Cons
  • Mildew can sometimes build up in the filters. That said, regular cleaning is required.
  • The unit takes up a lot of space under the sink.
  • It can sometimes start leaking if not threaded properly.
Verdict

This excellent reverse osmosis filter system has six stages of filtration. That is one more than most standard RO systems, which results in much tastier drinking water. This is due to the alkaline remineralization stage, which essentially restores the minerals in the water. As a result, you get water that tastes a lot more natural instead of one that has a ton of chemicals in it. You also won’t have to worry about contaminants like chlorine, fluoride, lead, arsenic, asbestos, calcium, and sodium.


Frizzlife RO Reverse Osmosis Water Filtration System

Frizzlife RO Reverse Osmosis Water Filtration System - 600 GPD High Flow, Tankless, Reduce TDS, Compact, Alkaline Mineral PH, 1.5:1 Drain Ratio, USA Tech Support, PD600-TAM3
Specifications

Dimensions

18 x 17.6 x 15.6 inches

Weight

28.9 pounds

Color

Black and White

Package

System Cover, Brushed Nickel Faucet, CP Filter, 600G RO Membrane, TAM3 Alkaline Remineralization Filter, Tubings, Wastewater Clamp, Fittings, and Screws.

Rating: 93% Overall
95%
efficiency
92%
flow speed
94%
installation
92%
quality
Pros
  • This system restores essential minerals in your water.
  • It adjusts the PH to more than 7.5.
  • Comes with a compact and sleek design.
  • Features a tankless design that saves space.
  • Able to produce 600 gallons of water per day.
  • Comes with a smart display panel to indicate the remaining lifespan of the filter.
Cons
  • Difficult to install due to its built and feature.
  • Makes minimal noises when getting water.
Verdict

This is an excellent reverse osmosis filter system for those who like their water pH levels to be healthy. It’s quite efficient in water usage, saving you up to 450% compared to other systems. Because it doesn’t require tanks, you can place this machine in pretty much any kitchen sink setup. This item also comes with a built-in TDS system that constantly monitors the quality of your drinking water. This ensures that the water you will be drinking will remain safe for a long time.


Home Master TMAFC-ERP Reverse Osmosis Water Filter System

Home Master TMAFC-ERP Artesian Full Contact Undersink Reverse Osmosis Water Filter System
Specifications

Dimensions

12 x 16 x 20 inches

Weight

14.5 pounds

Color

White

Package

Assembled Filter Cluster with RO Membrane and Permeate Pump, Storage Tank, and Adapter

Rating: 92% Overall
91%
efficiency
93%
flow speed
93%
installation
92%
quality
Pros
  • Comes with an innovative design that solves common traditional RO system problems.
  • Comes with seven stages of filtration.
  • It will remove up to 98% of chemicals, including chloramine.
  • The patented Full Contact technology adds calcium and magnesium minerals to the water.
  • This will reduce water waste by up to 80 percent.
  • Changing filters is quick and painless.
Cons
  • A bit challenging to install.
  • Replacing the filters can be difficult.
  • The written instructions are a bit vague which would require you to ask for help from professionals for its installation.
Verdict

This reverse osmosis filter system guarantees a super smooth water flow for your kitchen faucet. It’s also incredibly water-efficient, so you waste less and the costs are lower. The multi-stage filtration system is also intended to deal with chemicals, sediments, and microorganisms. This will prevent your water from getting contaminated while also keeping your pH levels perfect for drinking water. With this, you won’t have to worry about getting hard water ever again.


APEC Water Systems Portable Reverse Osmosis Water Filter System

APEC Water Systems RO-CTOP-C Portable Countertop Reverse Osmosis Water Filter System with Case, Installation-Free, Fits Most Standard Faucet
Specifications

Dimensions

15.5 x 6.5 x 6.5 inches

Weight

10 pounds

Color

Silver

Package

Case, APEC High-Capacity Filters

Rating: 91% Overall
93%
efficiency
90%
flow speed
91%
installation
91%
quality
Pros
  • Compatible with most standard faucets.
  • Comes with a protective aluminum casing.
  • Boasts the highest-grade, four-stage, ultra-pure system.
  • This is a 90 GPD portable system that is built with high-capacity filters.
  • Works for water pressure between 40 and 80 psi.
  • Compact and does not take up a lot of space.
Cons
  • The water flow is a little weak.
  • Installation is best done by a professional.
Verdict

This is one of the most affordable but also one of the best reverse osmosis filter systems in the market. Once it is installed, you can easily enjoy great-tasting water that is also safe to drink. This is thanks to the four-stage filtration system that makes use of semi-permeable layers to trap contaminants while letting water through. You don’t have to worry about dangers, both chemical and biological. If you want to use the water for washing dishes, there is a reversible water flow function, too.


Brondell Circle Reverse Osmosis System

Brondell Circle Reverse Osmosis System, Under Sink, Black – 4 Stage RO Water Designer Chrome Faucet– Quick Change Filter, WQA Gold Seal-Certified
Specifications

Dimensions

13.75 x 9.25 x 16.5 inches

Weight

14.6 pounds

Color

Black

Package

Faucet, Filters, and Hardware

Rating: 89% Overall
90%
efficiency
89%
flow speed
88%
installation
90%
quality
Pros
  • Up to 10 times more water-efficient than other reverse osmosis systems.
  • Comes with a six-liter tank.
  • Features a compact design that takes up less space.
  • Comes with a four-stage filtration system.
  • The package includes a designer faucet
  • It dramatically reduces industrial and harmful chemicals.
Cons
  • Improper DIY installation can lead to leaks.
  • The flow rate can be slower compared to when there is no reverse osmosis system.
Verdict

This reverse osmosis filter system produces some truly great-tasting water. You can easily install it yourself, though, you do have to double-check to prevent leaking. Once installed, the dissolved solids (TDS) levels can be reduced up to 10 times less than previous levels. The quarter-turn filters make changing the filters much easier. This makes the switch faster and less messy compared to other systems.

Reverse Osmosis Filter System Buyer's Guide

versatility

Reverse osmosis filter systems are meant to be installed in kitchen faucets. So if the faucet is not compatible with the system, one of them will have to be replaced. A good system should be compatible with most faucets and kitchen sinks so that you won’t have to go through that hassle. However, exceptions do exist such as with pull-down faucets.

materials

While these types of systems are typically similar in design, they will inevitably be different in terms of materials, material quality, construction, and so on. It’s also to be expected that they are going to vary in terms of how reliable and durable they will be relative to the cost. So be sure to keep that in mind when you are shopping for a reverse osmosis filter system.

ease of use

Despite the complexity of their typical design, reverse osmosis filter systems are actually relatively straightforward. Once they are installed, they will filter the water that is pushed through the pipes every time the faucet is opened. That is it. If the system requires you to fiddle with it every time you need water, it’s probably not meant for home use.

installation

Installing a reverse osmosis filter system should not take a lot of effort. This goes for both the systems that will go under the sink and those that can simply be placed on the sink countertop. In fact, the best examples of this product should be DIY-friendly, so that you won’t have to rely on a professional in order to enjoy delicious and pure drinking water.

safety

Most important of all, a reverse osmosis filter system must be safe to use. This means that they must not contribute to making the water dangerous to consume or to replace filtered toxins with new ones. One of the biggest threats with regard to these kinds of systems is particles from the filters, tubes, and cases also getting into the water. This is why you should only choose high-quality filter systems.

FAQs

What is a reverse osmosis filter system?

A reverse osmosis filter system consists of several devices that have semi-permeable membranes that are intended for purifying water and removing contaminants. It’s intended to remove all forms of chemicals or harmful metals that might be in the water. As a result, the water will be much safer to drink or to use for cooking.

Do I need a reverse osmosis filter system in my kitchen?

Unless you have absolute confidence in how your local water provider filters and treats its supply, then yes, you need a reverse osmosis filter system. This can basically act as extra protection against possible contaminants like metals, dirt, or harmful chemicals in the water. Lead, mercury, and even biological threats can be prevented from affecting your water with this system. It’s better for your health and the health of your family.

How does a RO filter system work?

Through several layers of filtration that involve semi-permeable membranes, a reverse osmosis filter system will essentially push water through these multiple fine meshes. These tiny openings will allow water molecules to get through but will stop everything else that is bigger. This can include sediments, chemical particles, mineral solids, and even salt. This is how such systems are able to produce pure drinking water.

Is water from reverse osmosis filter systems better than bottled water?

Generally speaking, the water you get from reverse osmosis filter systems is less wasteful than bottled water. Regardless of whether it is purified, distilled, or mineral, bottled water is more expensive and can contribute to pollution. On top of that, when paired with the kitchen sink faucet, you can use this system to fill up pots for stock, soup, or stews. This would be a lot more expensive when you use bottled water.