U.S. Code of Federal Regulations

Regulations most recently checked for updates: Aug 27, 2025

All TitlesTitle 46Chapter IPart 131Subpart H - Subpart H—Markings for Fire Equipment and Emergency Equipment
View all text of Subpart H [§ 131.800 - § 131.899]
§ 131.820 - Branch lines of fire-extinguishing system.

The valves of each branch line in the fire extinguishing system must be plainly and permanently marked, indicating the spaces served.

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