What should be done if appliances are found to be tight but leakage is still suspected?

When appliances are found to be tight yet there remains a suspicion of gas leakage, the most appropriate course of action is to conduct further testing on the piping system. This step is crucial to ensure safety and compliance with safety standards.

Further testing may involve performing methods like a soap test or using specialized gas leak detection equipment to identify any potential leaks that were not discovered in the initial inspection. It is critical to address any lingering concerns of gas leakage, as undetected leaks can lead to severe safety hazards, including explosions or gas poisoning.

This method allows for a comprehensive assessment of the entire piping system, which is essential for ensuring that any hidden vulnerabilities are identified and resolved before the appliances are used.