What is required to make an outlet gas tight when not connected?

Making an outlet gas tight when it is not connected is crucial for ensuring safety and preventing any potential gas leaks. The appropriate action in this case is to cap the outlet. Capping involves securely covering the end of the gas line with a cap designed specifically for this purpose. This cap is designed to ensure that no gas can escape, thereby maintaining the integrity of the gas system.

Capping is a reliable method because it provides a permanent and robust seal that can withstand pressure and ensure that the gas system remains safe until it is needed again. It also prevents any contaminants from entering the gas line, which is essential for the safety and functionality of gas appliances.

Other methods, such as plugging or sealing with tape, may not provide the same level of assurance as capping. Plugging may involve temporary solutions that are not suited for long-term use, and sealing with tape may not create a secure enough barrier to prevent gas escape, leading to potential safety hazards. Leaving the outlet detached and open is unsafe and directly contradicts safety regulations regarding gas systems, as it poses a significant risk of gas leaks. Thus, capping is the most effective method to ensure gas tightness when an outlet is not connected.