“Our drinking water is so much better.
And we are happy to have the water on hand instead of having to buy bottled water.
— Catherine G, OH
Reverse Osmosis Systems
Upgrade to Cutting-Edge Filtration
Target a broad range of potential contaminants and enjoy a virtually unlimited supply of worry-free drinking water with Culligan reverse osmosis (RO) systems.*
Why Choose Culligan Reverse Osmosis Systems
With easy installation, space-saving designs and smart features available, Culligan reverse osmosis systems provide the ultimate drinking water upgrade.
Reduce More Than 70 Contaminants
Culligan RO systems are certified to reduce 12x more contaminants than the leading standard filter pitcher.**
40 Billion+ Bottles Saved
Culligan water filtration solutions make an eco-friendly impact by reducing plastic bottle waste.
Smart Features Available
Get filter change alerts, track contaminants reduced and view plastic bottles saved through our app.
Reverse Osmosis
Filter products by category below.
Not What You’re Looking For?
Want to tackle problem water issues that impact cleaning, laundry and bathing, too? Ready to put an end to hard water headaches? See how Culligan whole house filtration systems and water softeners can help address your water concerns.
Reverse Osmosis Reviews
Reverse Osmosis Water Filter Benefits
Get a virtually unlimited supply of cleaner, safer, great-tasting drinking water for pennies a glass.
01
Customizable Filtration
Culligan RO systems have up to seven stages of filtration and 12 interchangeable filters.
02
Long Filter Life
With filters that can last up to two years, maintenance is simple and worry-free.
03
Third-Party Certified
Culligan systems are tested and certified by third-party organizations to ensure they meet the highest of industry standards.
04
Filtered Water on Tap
Get filtered water directly from your existing faucet with the ClearLink PRO™ accessory.
Never Question Your Water Quality
Start enjoying the benefits of cleaner, safer water in your home with help from your local Culligan water expert.
Compare Reverse Osmosis
Unsure of the best reverse osmosis system for your home? Learn how these systems work, then review the comparison chart below to help determine which one may be right for you.
Select and compare two products.
Aquasential® Smart RO Drinking Water System
Aquasential® RO Drinking Water System
Aquasential® Tankless RO Drinking Water Filtration System
AC-30 Good Water Machine®
 Aquasential® Smart RO Drinking Water System |  Aquasential® RO Drinking Water System |  Aquasential® Tankless RO Drinking Water Filtration System |  AC-30 Good Water Machine® | |
|---|---|---|---|---|
Benefits System Features | ||||
World’s most efficient RO system¹ | ||||
Compatible with ClearLink PRO™ wireless filtration control | ||||
Advanced filtration for lead, arsenic, pharmaceuticals, volatile compounds and other emerging contaminants | ||||
Space-saving tankless design | ||||
See water usage and system performance via app | ||||
Can alert you and your dealer to service needs and filter changes via app | ||||
Track single-use plastic bottles and money saved through app | ||||
Certified to reduce more than 70 contaminants, plus 15 emerging contaminants | ||||
NSF Protocol P231 certified for virus and bacterial reduction | ||||
Hear What Customers Say
There is a huge difference because the quality of the water now is so much better.— Jose R
Frequently Asked Questions
What is reverse osmosis water filtration?
In reverse osmosis water filtration, water flows across a tightly woven membrane that separates the water from contaminants as small as a single atom. Typically, the reverse osmosis process is combined with multiple other stages of filtration including a sediment filter, carbon filtration, and additional speciality filtration stages.
How long do reverse osmosis filters last?
The lifespan of your filter depends on a number of factors including how much water you use, your local water quality and the specific RO system you choose. Regularly replacing your filters will help ensure your system is running at full capacity. Some filters should be changed annually, but others can last up to two years. The reverse osmosis membrane should be checked annually and typically lasts three to five years.
How do reverse osmosis filters work?
Reverse osmosis filters contaminants from water by forcing them through a semipermeable membrane. Some of these contaminants include lead, mercury and chromium, among many others.
Is it safe to drink chlorinated water?
It’s common for city water to be treated with small concentrations of chlorine, which is not typically a hazard to your health. However, if you prefer to minimize the chlorine in your water, which can cause unpleasant tastes and odors, a reverse osmosis system could help.
Why get a reverse osmosis system?
You can get a virtually unlimited supply of cleaner, safer, better-tasting water right from the tap. With multiple stages of filtration, these systems are one of the most comprehensive ways to treat your water for a wide variety of potential problems.
Articles and Resources
Schedule Your Free Water Consultation
Our Culligan water experts are ready to help you find the right solution for your problem water. We offer a free in-home water test, or we can schedule a phone consultation (you can select your choice in the next step).
Enter Your Information
Fields marked * are required fields.
Enter Your Information
Fields marked * are required fields.