Backflow testing is to ensure your backflow assembly is working correctly and is required annually in most Illinois jurisdictions. In Illinois, properly credentialed inspectors should only test and certify your backflow is in working order. A backflow event is when drinking water flows backwards to the source. If a water main were to rupture or the City’s firefighters opened multiple hydrants to put out a large fire, the water main’s pressure could plummet. The water demand upstream may create a flow reversal and tanks or hoses that contain chemicals or other non-potable things could be sucked up into the water supply. To prevent this from happening, backflow preventers are installed on a water main. They have a series of pressurized chambers and valves that prevents this from happening. During a test, the certified tester measures the pressure of each chamber and checks the functionality of all the valves. CBI ensures the device is clear of any debris. If applicable Berwyn residents must have their backflow devices tested every year to ensure that they are working properly.

A cross connection is any actual or potential connection between the drinking water lines and potential sources of pollution or contamination. This can include a piping arrangement or equipment that allows the drinking water to come in contact with non-potable liquids, solids, or gases. A cross connection can be hazardous to humans if/when there is a backflow of contaminated water.

In order to protect the public from cross-connection hazards, Berwyn requires all businesses and facilities with cross connections must have their backflow prevention devices tested on an annual basis. Backflow testing must be performed by a certified tester and the results must be submitted to the City. Failure to do so could result in serious health consequences for you and your employees, customers, or tenants and possible fines.