I used to do fire flow calculations by hand previously but now we have to move to software. I work on to ensure sufficient fire flow on small project sites. I tried working using EPANET but it needs to have reservoir in design. But, in my case I just design based on a supply line from city mains. I have Pipe size as 6 in. throughout and the connection to mains have elevation of 159 ft. Static pressure, residual pressure and simulation discharge is 74 psi, 57 psi and 2000 gpm respectively. I have to maintain 20 psi to the furthest hydrant. Please tell me process to do it. Do you know of any manual or videos to design?