What should be regularly checked in a gas appliance to prevent leaks?

The regular checking of gas lines and connections in a gas appliance is essential to prevent leaks because these components are directly involved in the flow of gas from the supply to the appliance. Over time, gas lines can corrode or develop wear from environmental exposure or mechanical stress, which may lead to leaks. Ensuring that connections are properly tightened and free from damage helps maintain the integrity of the gas system, thus reducing the risk of hazardous situations like gas leaks, which can lead to fires or health risks due to inhalation of gas.

While other components such as thermal insulation, electrical wiring, and ventilation ducts are crucial for the safe and efficient operation of gas appliances, they do not have a direct role in preventing gas leaks. Regular checks of gas lines and connections are a primary safety measure in gas appliance maintenance.