Section R. 408.30539a - Automatic fire sprinkler systemsRule 539a. Sections R313.1, P2902.5.4 and P2904.1 of the code are amended to read as follows:
R313.1. Design and installation. Where installed, automatic residential fire sprinkler systems shall conform to the design and installation requirements of the national fire protection association (NFPA) standard 13D or P2904.1.P2902.5.4. Connections to automatic fire sprinkler systems. The potable water supply to automatic fire sprinkler systems shall be protected against backflow by a double check-valve assembly or a reduced pressure principle backflow preventer.Exception: Isolation of the water distribution system is not required for deluge, preaction, or dry pipe system.
P2904.1. General. Where installed, residential fire sprinkler systems, or portions thereof, shall be in accordance with NFPA 13D.Mich. Admin. Code R. 408.30539a