Updates to Flexible Sprinkler Hoses

UL 2443 Standard for Flexible Sprinkler Hose with Fittings for Fire Protection Service has been revised to address historical questions regarding flexible sprinkler hoses. The new product standard now addresses maximum K-factors for sprinklers, new methods for determining friction loss and the maximum number of bends, and updates to marking requirements and installation instructions. Concurrently, NFPA 13 has proposed language to address installation requirements for flexible sprinkler hoses for the first time.