Naperville Backflow Testing
Trusted Backflow Testing Near You in Naperville, Illinois
If you are a resident or business in Naperville, Illinois, backflow testing is required by the City of Naperville to ensure the safety of your drinking water. Whether you have a single backflow assembly or multiple assemblies, our backflow specialists can tailor a plan that perfectly fits your needs and budget. With over 40 years of experience servicing the greater Chicago, Illinois, and Northwest Indiana areas, you can count on Chicago Backflow for all your commercial or residential backflow testing, repair, installation, and emergency needs. Give us a call today at 708.389.5600 to get started!
Residents and businesses in Naperville, Illinois, can rely on our annual backflow testing service to ensure their property remains compliant with Naperville’s backflow regulations. Our inspectors are the best in the business, and we are available 24/7 to answer any questions or concerns. Whether you need backflow testing, repairs, installations, or an emergency response, contact us today to schedule a test or obtain more information.
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Why Is Backflow Testing Important?
Backflow testing ensures your property’s water system is protected from contamination. Backflow happens when water reverses direction due to pressure changes, allowing potentially harmful substances to enter the water supply.
This can occur if:
A water main breaks
Firefighters open multiple hydrants
Irrigation systems, hose connections, or storage tanks experience pressure loss
To prevent this, backflow prevention devices are installed on water lines. During a professional test, our licensed technicians:
Uses backflow test gauge to test each component according to set standards in Illinois
Inspect all valve components for correct operation
Ensure the device is clear of debris. If it is not, the inspector will clean components thoroughly.
Naperville requires these devices to be tested annually by a licensed backflow tester, and results must be submitted to the city to maintain compliance.


What Is A Cross-Connection?
A cross-connection is any actual or potential link between your drinking water system and a source of contamination. This could include:
Garden hoses submerged in buckets or pools
Irrigation systems
Chemical tanks
Fire sprinkler systems
Contaminants can flow backward into your clean water supply without a proper backflow prevention device, creating a serious health risk.
Naperville ordinances require businesses and facilities with cross-connections to test backflow devices annually, helping to protect you, your employees, and your customers.