What is the name of the valve that controls the flow from the domestic water supply or fire pumps?

The main control valve is essential in managing the water supply within a building's fire protection system. It is responsible for controlling the flow of water from the domestic water supply or fire pumps to various systems such as sprinklers or standpipes.

By regulating the water flow, the main control valve ensures that adequate pressure and volume are maintained during a firefighting operation, which is crucial for effective fire suppression. Understanding this valve's function is vital for a Fire and Life Safety Director, as it has direct implications on maintaining safety protocols and ensuring that the fire protection systems operate properly when needed.

The other options, while related to water management within fire protection systems, serve different purposes: the flow control valve typically manages the rate of water flow in a specific system, the pressure relief valve is designed to relieve excess pressure to prevent system damage, and the sprinkler shut-off valve is used to isolate the sprinkler system from the water supply for maintenance or repairs.