What must be included in a gas appliance installation inspection?

In a gas appliance installation inspection, verifying proper gas line connections is crucial for ensuring safety and compliance with regulations. This step involves checking that the gas lines are correctly fitted and secured, that there are no leaks, and that the connections meet the specifications laid out by the manufacturer as well as local codes. Any leaks or improper connections can lead to dangerous situations, including gas leaks or explosive hazards. Ensuring that the gas line connections are sound is a fundamental aspect of maintaining safety standards in gas appliance installations.

While the other options may have their own relevance in different contexts, they do not address the critical safety and regulatory requirements that come with gas appliances. For example, while a visual inspection of the appliance's aesthetics may be important from a consumer satisfaction perspective, it does not contribute to the safe operation of the appliance. Similarly, testing electrical components might be necessary for appliances that use electricity but is not specific to gas installations. Finally, assessing the overall design layout of the installation may be helpful for efficiency, but it does not address the immediate safety concerns associated with gas supply and connections.