What action should be taken when a backflow device shows a “failed” test result?

When a backflow device shows a "failed" test result, the appropriate action is to repair or replace the device. This is crucial because a failed backflow prevention device can lead to contamination of the potable water supply, which poses significant health risks.

Addressing the issue immediately by repairing or replacing the device ensures that it functions correctly to prevent backflow, thereby safeguarding public health and maintaining compliance with local regulations. Regular testing and maintenance are important, but if a device fails, those actions alone are insufficient without rectifying the underlying problem.

Waiting for the next inspection or simply adjusting the water pressure would not resolve the immediate risk associated with a failed device and could lead to serious consequences, including potential fines or public health issues. Therefore, taking swift action to repair or replace is the only responsible and effective response to a failed backflow device test result.