Why is it important to verify proper operation after opening a closed control valve?

Verifying proper operation after opening a closed control valve is essential because it confirms that fire protection has been restored. When a control valve is closed, the flow of water to the sprinkler system is halted, potentially leaving the system inoperable in the event of a fire. Once the valve is reopened, it is critical to ensure that the system is functioning effectively and that water can flow to the sprinkler heads as intended. This verification is key in assuring that the fire protection system is ready and able to perform when needed, thus providing the necessary safety for occupants and property.