Valve Identification Signs
According to NFPA 13, all control valves, drain valves, and test connections should have permanently marked weatherproof metal or rigid plastic identification signs. Building staff should secure the identification signs with corrosion-resistant wire or chain. The control valve sign needs to indicate the portion of the building served. Knowing which valve controls what part of the building helps mitigate the extent of water damage if the system develops a breach through a broken sprinkler head or following suppression of a fire.