76.25-25—Controls.
(a)
The controls for the system shall be outside the spaces protected, and shall not be located in such space as might be cut off or made inaccessible in the event of fire in any of the spaces protected. The control space shall be marked as required by § 78.47-17 of this subchapter.
(b)
Each supply line to the various zones shall be fitted with a stop valve which shall be marked as required by § 78.47-15 of this subchapter. These valves shall be normally open, and shall indicate by an alarm if they are closed.