Hose inspection mandated by the NFPA25.

16.3.1. Scheduling

Hose inspection is performed every 3 years, by your licensed sprinkler company, typically at the same time of the annual sprinkler and standpipe inspection date. 

16.3.2. Inspection

To remove and inspect the hose, including gaskets, and rerack or rereel at intervals in accordance with NFPA 1962.