What information must be provided on signs for control, drain, and test connection standpipe system valves?

The correct choice indicates that the purpose of the valve must be included on signs for control, drain, and test connection standpipe system valves. This is critical because understanding the purpose of each valve helps firefighters and maintenance personnel respond effectively in emergencies. Each valve has a specific role, such as controlling water flow, draining the system, or allowing for pressure tests, and knowing its function can facilitate quick and efficient actions when time is of the essence.

Clearly labeling the purpose ensures that individuals involved in fire safety activities can easily identify how to interact with the system. It minimizes the risk of confusion during an emergency and supports compliance with safety regulations.

Other options, while potentially informative, do not directly contribute to maintaining the operational integrity and safety of the standpipe system in the same critical way. Knowing the location of the valve is useful, but without understanding its purpose, personnel might not utilize it correctly. The names of operators or manufacturer details can provide additional context, but they are less essential in an emergency response scenario where immediate clarity regarding functionality is paramount.