Backflow occurs when the water in your pipes (after the water meter in your building/facility) goes backward (opposite its normal direction).
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A cross-connection is when the drinking water supply line is connected to a non-potable substance. i.e. industrial equipment lines, a garden hose filling a pool or spa.
There are two situations that can cause the water to go backward (Backflow):
According to Modesto Municipal Code 11-1.113 and California Health and Safety Code 116800-116820 all backflow prevention assemblies are to be tested annually at the owner / water account holder's expense. Be sure to utilize a Certified Tester when performing this task.
There are two types of Backflow prevention assembly devices:
The City of Modesto's Cross-Connection Specialist is available to help conduct a backflow survey within your facility to determine what type of backflow prevention assembly is best to protect your facility and your personnel. You will receive a survey report complete with recommendations. To arrange for this free service you may contact us at 209-342-2246 or via e-mail at WaterBackflow@modestogov.com
According to California Health and Safety Codes 116800 and 116407; Water Code 13553 and 13578; and Modesto Municipal Code Article 20 section 9-8.2003 Plumbing hazards and 11-1.14 sections (g, i, j, k, l, and m): backflow preventers are required on all commercial buildings that have a potential cross-connection.
Backflow assemblies are devices that are installed at the point of connection/service and prevent non-potable substances from flowing back into the drinking water supply. There are various types of assemblies that are specific for certain applications.
You received this letter because an approved backflow assembly is required to be installed at the service connection to protect from potential backflow conditions.
If you had the assembly tested, repaired, or installed contact your tester / installer to ensure the test report was sent to the City of Modesto cross-connection control staff. If the work has not been completed you need to do so to ensure there is no interruption in your water services.
Non-compliance may result in your water services being discontinued as well as fines and penalties being added.