What action must be taken immediately after installing a gas outlet?

After installing a gas outlet, it is essential to close the outlet with a cap or plug as an immediate action. This step is crucial for safety reasons, as it helps to prevent any gas leaks from occurring at the outlet. When an outlet is newly installed, it is left open, which poses a risk if the gas supply is inadvertently activated before the outlet is connected to an appliance. By using a cap or plug, the outlet is securely closed off, ensuring that no gas can escape and mitigating the risk of an explosion or fire hazard.

While actions such as thread sealing, color coding, and pressure testing are also important in gas installation practices, they are not the immediate priority right after a gas outlet is installed. These steps usually follow or accompany the sealing of the outlet to ensure overall system integrity and compliance with safety codes.