This is the process of checking whether a plumbing system can prevent backflow. “Backflow” happens when contaminated water reverses, flowing back into the drinking water supply.

Backflow testing ensures that a building’s plumbing system complies with local and state regulations, and it keeps the community’s water supply safe. The process usually involves shutting off the water supply, installing a backflow preventer valve, and running a series of tests to check the valve’s effectiveness.

Such testing is crucial for preventing health hazards and protecting water supplies. Typically, backflow checks are required annually for commercial and industrial buildings.