Grasp the critical importance of working plans, hydraulic calculations, and system acceptance through this module in the updated 2013 NFPA 13 Online Course Series. Course 4 in the NFPA 13 Online Course Series — Working Plans, Hydraulic Calculations, and System Acceptance — provides you with a greater understanding of the importance of working plans, hydraulic calculations, and the requirements for working plans and hydraulic calculations to be approved. You’ll also learn about the items that must be contained in the working plans, including the piping layout, fittings, sprinklers, valves, hangers, braces, and test connections.