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Cross Connection
What is a backflow prevention device?
These devices will not allow water in the pipes to flow in reverse. There are many types of backflow preventers for all applications. Most homeowners have one testable device (it is on the lawn irrigation water line) and several non-testable devices (vacuum breakers on the garden hose connection).

What do I have to do?
  • Backflow prevention devices must be tested by a state certified tester on a regular basis to make sure they are working properly.
  • The plumbing code requires that you have the devices tested by a state certified tester every 3 years. The tester is required to fill out a test report that must be submitted to the city.
  • The backflow prevention test report is available at the Building Department counter or here.
  • A list of certified testers can be found on the Hydrocorp website or on the Department of Public Services Cross Connection page.

Participation with this program is required in accordance with Michigan's Safe Water Drinking Act - P.A. 399, Part 14.

The City of Rochester Hills has contracted with Hydrocorp of Troy, MI for its cross connection inspections. Please note that letters addressing cross connection will be sent out to residents in phases throughout the city.

Should you need further information please contact Hydrocorp at 1.800.690.6651, or visit our Cross Connection webpage for frequently asked questions and related links.

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