In the sixth session (6 of 6) of this seminar series, we present CYPEFIRE Hydraulic Systems, a programme used to calculate and design hydraulic fire-extinguishing networks using sprinklers and fire hose reels. It includes EPANET 2 software developed by the Water Supply and Water Resources Division from the U.S. Environmental Protection Agency’s National Risk Management Research Laboratory. This application is integrated into the Open BIM workflow via the BIMserver.center platform.