About CBI
Chicago Backflow Cares About YOU
Chicago Backflow, Inc. (CBI) works to protect water resources every day through backflow testing, repair, installation and emergencies. CBI’s attention to detail, commitment to professionalism, industry-leading expertise and dedication to providing our customers with exceptional service 24 hours a day, 7 days a week…sets us apart from the average backflow testing company. Chicago Backflow, Inc. began its journey as a family-owned business and remains so to this day. YOU are part of the ever-expanding Illinois and Indiana backflow family.
Chicago Backflow, Inc. (CBI) works to protect water resources every day through backflow testing, repair, installation and emergencies. CBI’s attention to detail, commitment to professionalism, industry-leading expertise and dedication to providing our customers with exceptional service 24 hours a day, 7 days a week…sets us apart from the average backflow testing company. Chicago Backflow, Inc. began its journey as a family-owned business and remains so to this day. YOU are part of the ever-expanding Illinois and Indiana backflow family.


Professional Inspectors
Whether your backflow preventer needs cleaning, or is not functioning properly, the plumber acting as a backflow inspector may not have the experience or knowledge to fix the problem, if they even catch it at all! This is not, and never will be the case with Chicago Backflow. Each and every time you schedule your backflow test and certification with CBI, guaranteed your inspection will be completed by a fully licensed backflow inspector that ONLY tests, certifies, and repairs/installs backflow preventers. Backflow testing is CBI’s specialty.
Knowledgeable Office Staff
The combined knowledge of backflow and backflow operations of over 50 years, makes our office staff the best in the business! We handle thousands of inquiries throughout the year with care, expertise, professionalism, urgency and sometimes… a bit of humor!
When you call or email Chicago Backflow, you are talking to someone that truly cares about getting your backflow needs taken care of quickly and efficiently.




Knowledgeable Office Staff
The combined knowledge of backflow and backflow operations of over 50 years, makes our office staff the best in the business! We handle thousands of inquiries throughout the year with care, expertise, professionalism, urgency and sometimes… a bit of humor!
When you call or email Chicago Backflow, you are talking to someone that truly cares about getting your backflow needs taken care of quickly and efficiently.
CBI is not your typical run of the mill backflow testing company
With over 40 years of experience, Chicago Backflow, Inc. started off as a family-owned business and remains that way to this day. Our team of 12 licensed CCCDI inspectors not only service the greater Chicago metropolitan area, but also Northwest Indiana and to the borders of Iowa and Wisconsin. The belief in growing together as a family and treating your team with respect are the cornerstones around which this company was built and how we operate to this day.


Three generations of CBI Doug, Vito, and Mike Eisenhauer.
CBI is not your typical run of the mill backflow testing company
With over 40 years of experience, Chicago Backflow, Inc. started off as a family-owned business and remains that way to this day. Our team of 12 licensed CCCDI inspectors not only service the greater Chicago metropolitan area, but also Northwest Indiana and to the borders of Iowa and Wisconsin. The belief in growing together as a family and treating your team with respect are the cornerstones around which this company was built and how we operate to this day.


Three generations of CBI Doug, Vito, and Mike Eisenhauer.


Chicago Backflow’s top notch customer service team.
Another benefit of working with CBI is our amazing customer service. When you reach out to us, you get to speak with one of our team members directly. Supporting each of our backflow inspectors is a full office staff of the most experienced group in the industry. We believe in interacting and resolving any problems that come up without running you through automated menus or outsourced representatives. The philosophy of maintaining the relationships with our clientele and providing a collection of talented individuals pulling together to harmonize in protecting our drinking water, has not changed, even as technology has advanced. We are dedicated to achieving optimal results by providing only the best support and inspectors for our services which are available 24 hours a day, 7 days a week. Holding to these standards, our attention to detail, and working to protect our water resources over the years, has allowed us to build the trust needed to grow our business into the premier backflow testing company in the country.
We offer more than the rest, for less
In keeping with this philosophy of offering cutting edge opportunities to help guide their customers, CBI is the only backflow testing company to offer an “all-inclusive” service package. The all-inclusive program allows for peace of mind when it comes to ensuring your backflow is kept in top working condition. It includes the annual testing and certification of the backflow device, as well as internal parts and repairs as needed for no additional cost. In addition, the backflow valve is covered for the next 12 months if any emergency return trips are needed. This helps alleviate any unexpected bills for repairs or even return service calls, allowing for onsite repair to be included at the time of evaluation with no extra cost incurred.


Pete Rodriguez standing next to a CBI van.


Backflow Industry Trailblazers
When the Safe Drinking Water Act was federally mandated (1974), the need for testing backflow preventers became more prevalent. Mandated annual testing became a vital part of the initiative. Mike Eisenhauer, current owner of CBI, was one of the first to adapt and dedicate his business to this expanding field. He was committed to applying his plumbing knowledge to train the best backflow team available, so they could provide the top tier field work and customer service. The initial committee for safe water and backflow prevention was formed in 1985 and comprised a team of five people. Being a part of that committee helped build the foundation for the small family-owned plumbing business that was Eisenhauer Plumbing to evolve into what Chicago Backflow is today.
When the Safe Drinking Water Act was federally mandated (1974), the need for testing backflow preventers became more prevalent. Mandated annual testing became a vital part of the initiative. Mike Eisenhauer, current owner of CBI, was one of the first to adapt and dedicate his business to this expanding field. He was committed to applying his plumbing knowledge to train the best backflow team available, so they could provide the top tier field work and customer service. The initial committee for safe water and backflow prevention was formed in 1985 and comprised a team of five people. Being a part of that committee helped build the foundation for the small family-owned plumbing business that was Eisenhauer Plumbing to evolve into what Chicago Backflow is today.
CBI = Backflow Industry Trailblazers
When the Safe Drinking Water Act was federally mandated (1974), the need for testing backflow preventers became more prevalent. Mandated annual testing became a vital part of the initiative. Mike Eisenhauer, current owner of CBI, was one of the first to adapt and dedicate his business to this expanding field. He was committed to applying his plumbing knowledge to train the best backflow team available, so they could provide the top tier field work and customer service. The initial committee for safe water and backflow prevention was formed in 1985 and comprised a team of five people. Being a part of that committee helped build the foundation for the small family-owned plumbing business that was Eisenhauer Plumbing to evolve into what Chicago Backflow is today.
When the Safe Drinking Water Act was federally mandated (1974), the need for testing backflow preventers became more prevalent. Mandated annual testing became a vital part of the initiative. Mike Eisenhauer, current owner of CBI, was one of the first to adapt and dedicate his business to this expanding field. He was committed to applying his plumbing knowledge to train the best backflow team available, so they could provide the top tier field work and customer service. The initial committee for safe water and backflow prevention was formed in 1985 and comprised a team of five people. Being a part of that committee helped build the foundation for the small family-owned plumbing business that was Eisenhauer Plumbing to evolve into what Chicago Backflow is today.