What type of valve should be found at the gas meter for safety?

A lockable valve at the gas meter is crucial for ensuring safety and security in a gas supply system. This type of valve allows for the gas supply to be shut off manually while offering the option to secure it with a lock, preventing unauthorized access and tampering. The ability to lock the valve adds an extra layer of safety by ensuring that only authorized personnel can operate it, which is particularly important in residential and commercial properties where gas can present significant hazards if mishandled.

In contrast, manual valves, while functional, do not have locking mechanisms and can be inadvertently turned on or off by anyone with access. Remote valves may allow for shutting off gas from a distance, but they can lack the physical security features of a lockable valve. Automatic valves can enhance convenience and safety by responding to specific conditions, such as detecting leaks, but they do not provide the same lockable security feature that helps ensure the gas supply remains controlled and accessible only to authorized individuals. Therefore, a lockable valve stands out as the best option for safety at the gas meter.