Discover Chicago Backflow!

Choosing CBI for your annual backflow testing is the best decision you can make! With a team of highly specialized and licensed inspectors, over 50 years of combined experience, and a commitment to exceptional customer service, CBI ensures your backflow preventer is tested, certified, and maintained to the highest standards. Learn how our expertise and dedication to quality makes CBI the best choice for safeguarding your water system.

CBI is a fully-licensed plumbing contractor performing backflow testing in compliance with local and state laws.

With a team of highly trained technicians and 31+ years of experience in the industry, Chicago Backflow can efficiently diagnose and repair a wide range of backflow prevention devices, ensuring they operate at optimal levels.

Chicago Backflow uses high-quality materials and follows the best practices to guarantee reliable performance and compliance with local codes and standards. Whether it is a new installation or a replacement, Chicago Backflow’s commitment to excellence ensures that each installation is completed professionally and meets the highest standards of quality and safety.

We have inspectors ready 24/7, 365 days a year – yes, even holidays!

Sign Up for our Backflow Guide

Unlock the ultimate resource for understanding backflow prevention devices by signing up to download our comprehensive PDF guide. Packed with expert insights, practical tips, and detailed explanations, this guide is designed to help you navigate the complexities of backflow prevention and maintenance with ease. Whether you are a homeowner, business owner, or industry professional, our guide will empower you with the knowledge to ensure your water system remains safe and compliant.


Read what some of our happy customers had to say about our backflow services:

“Chicago Backflow is a great company. They are very professional and have excellent customer service. I have been very pleased with the routine maintenance and fast response to emergencies. I will continue to use Chicago Backflow for a long time.”
Anthony Graziani, Steger School District 194

“The Elk Grove Park District has been a customer of Chicago Backflow for more than 15 years and in all that time, we have enjoyed terrific service, thorough repairs, numerous new installations, and fair prices!  Other companies have tried to lure us away with the promise of cheaper inspection costs, but the true value of Chicago Backflow’s service is in the warranty work they perform for us, often same day, and at no cost to us.

I highly recommend Chicago Backflow to anyone who is serious about their water safety program.”

John Walters | Building Maintenance Crew Leader, Elk Grove Park District

“The CBI team continues to amaze us. John Keating had left our home only an hour or so after inspecting our backflow valve when your final report arrived by e-mail. That’s real efficiency. We want to thank Mike Eisenhauer, John, Jessica, Katie, Barb and the entire CBI family for your generous gift of time and skills. We can never thank you enough. We wish you and CBI good health and good fortune in all the years ahead.”

Bill Nicholson

“I wanted to let you and your bosses know that your technician, Alan, is an amazing man. He serviced my backflow last year and he was out again this morning. He is so kind and considerate of my property. He explains things and he is just a pleasure to be around. Not to mention that he does an excellent job, he is honest and he cares. In today’s world that is such a rare thing to find. I will use the services of Chicago backflow for as long as you keep great employees like Alan.

Thank you so much for your great service.”

Fran Schultz