46 C.F.R. § 131.820 Branch lines of fire-extinguishing system.
Title 46 - Shipping
The valves of each branch line in the fire extinguishing system must be plainly and permanently marked, indicating the spaces served.
Title 46: Shipping
PART 131—OPERATIONS
Subpart H—Markings for Fire Equipment and Emergency Equipment
§ 131.820 Branch lines of fire-extinguishing system.
