Backflow Prevention Practice Exam

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What must be done before any maintenance on a double check valve assembly?

Notify local authorities
Shut off the water supply
Conduct a flow test
Removal of the assembly

The correct answer is: Shut off the water supply

Before conducting any maintenance on a double check valve assembly, it is crucial to shut off the water supply. This step is essential to ensure safety and prevent any potential water leakage or backflow that could occur while the assembly is being serviced. By shutting off the water, you eliminate the flow of water through the system, allowing maintenance to be performed without risking contamination of the drinking water supply or exposure to high pressure. Shutting off the water also protects both the technicians undertaking the maintenance and the plumbing infrastructure from damage that could arise if the valve assembly were to inadvertently open during work. This protocol is a standard safety practice in plumbing and valve maintenance as it minimizes risk and ensures compliance with regulatory requirements for backflow prevention maintenance. While notifying local authorities, conducting a flow test, or the removal of the assembly may be necessary steps in specific contexts or for certain procedures, they are not the immediate first actions required for maintenance on a double check valve assembly.