If a backflow prevention device fails a test, what action should be taken?

When a backflow prevention device fails a test, the appropriate action is to repair or replace it immediately. This response is critical because a failed device indicates that there may be a risk of contamination in the potable water supply. Allowing a failed device to remain in service poses a serious health hazard, as it can lead to the backflow of potentially harmful substances into the drinking water system.

Timely action ensures that the integrity of the water supply is maintained and protects public health. Repairing or replacing the device immediately also aligns with regulations and best practices in plumbing and water safety management, which emphasize the importance of maintaining all backflow prevention devices in good working order to prevent contamination.