What should be checked if a pressure drop occurs during a leak test?

When a pressure drop occurs during a leak test, it is essential to check all appliances and their connections. This is crucial because appliances are often the source of leaks due to improper installation, wear, or damage to the connection points. Each appliance has its own set of connections to gas lines, and any failure at these junctions can lead to a loss of pressure.

Testing appliances and their connections allows for a thorough assessment to ensure that all components are functioning properly and securely sealed. Issues might stem from gas valves, flares, unions, or hoses that connect the appliance to the gas supply, making a comprehensive check of these areas vital in maintaining system integrity and safety.

While checking the gas meter functionality, external gas lines, and building construction materials may provide additional insights, they are not the immediate focus when addressing a pressure drop in relation to a leak test specifically. The appliances and their immediate connections are most likely to contribute to such a pressure drop, making them the primary concern in this scenario.