In Michigan, irrigation system backflow preventers must be installed by a licensed plumber.

• A. True
• B. False
• C. Only in new installations
• D. Optional in some cases

Answer: (A)

Backflow preventers are safety devices that stop irrigation water from contaminating the home’s drinking water. In Michigan, installing these devices is treated as plumbing work, so it must be done by a licensed plumber. This ensures the device is sized, installed, and sealed correctly according to the Plumbing Code, reducing the risk of cross-connections. Licensed plumbers are equipped to follow manufacturer instructions, perform proper shutoffs and clearances, and arrange for the required testing and inspection. The requirement applies to all installations, not just new systems or certain cases, making this the best answer.