Get Started with a Free Water Consultation

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

“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

“Culligan is a trusted name.

… We purchased their drinking water system and it has made such a huge difference in the taste of our water.
— Donna and Les C, AB

“Most effective and problem free.

… The annual maintenance is reasonably priced. The maintenance staff has always been polite and performed efficiently.
— Fred H, FL


Customizable Filtration

Culligan RO systems have up to seven stages of filtration and 12 interchangeable filters.


Long Filter Life

With filters that can last up to two years, maintenance is simple and worry-free.


Third-Party Certified

Culligan systems are tested and certified by third-party organizations to ensure they meet the highest of industry standards.


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.
Culligan reverse osmosis system
Aquasential® Smart RO Drinking Water System
Aquasential® RO Drinking Water System
Aquasential® RO Drinking Water System
Aquasential® Tankless RO Drinking Water Filtration System
Aquasential® Tankless RO Drinking Water Filtration System
AC-30 Good Water Machine® Under Sink Water Filtration System
AC-30 Good Water Machine®
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
man drinking water out of a glass

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?​

How long do reverse osmosis filters last?

How do reverse osmosis filters work?​

Is it safe to drink chlorinated water?​

Why get a reverse osmosis system?

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.

By opting in, you are agreeing to receive SMS messages from Culligan. Alerts at the phone number listed above. 4 msgs/month. If you have questions, text HELP to 73777 or contact Customer Service at 1-855-558-1684 or You can opt-out of the subscription anytime by texting STOP to 73777. Msg&data rates may apply. You can view the Terms and Conditions here and Privacy Policy here.