Before placing appliances and equipment in operation, what must first be checked?

Before placing appliances and equipment in operation, it is crucial to check for leakage in the piping system. This step is essential to ensure safety and prevent potential hazards such as explosions or fires that can arise from gas leaks. A thorough inspection of the piping for any signs of leaks allows for the detection of issues that could compromise the integrity of the system, ensuring that gas is effectively contained and safely routed to the appliances.

While ensuring a proper connection to the power supply is important for electrical appliances, and calibration of settings is necessary for optimal operation, these steps come after confirming the integrity of the gas system. Similarly, the installation of surge protectors is relevant for protecting electrical components but does not address safety concerns specifically related to gas appliances. Therefore, verifying the absence of leaks in the piping system takes precedence to safeguard both people and property before the appliances are put into use.