https://www.youtube.com/watch?v=m3i_5xP9PYU
10 minute video
200K views in 1 day
this is a little bit more complicated than what fire departments
usually do - but not much
FD pump operators might need to watch this a couple of times and let it sink in
its just a bit over my head - but I have seen 'pump efficiency curves'
before and given them a little bit of thought