As I was studying my plumbing, I came to a point where the subject was fire protection system and it occurred to me that the plumbing design for fire protection needs a little bit more mathematical or hydraulic mechanics than just mere connection of pipes. If a fire truck connects to a stand pipe how high can the fire-water reach? Thus, this question dominos to more question like; if the fire truck can give off 100 GPM at 100 PSI how can it go vertically; what is its highest point?, what would happen if the pipes size were smaller say 3 inch?, how high should it go if I would reduce the pipe from 4 inch-3inch then to 2inch?, when/ or at what height do you change the pipe sizes? So in conclusion, what is the relationship (mathematical formula) of water supply (GPM), pressure (PSI) to its resistance (pipe size, gravitational pull, friction loss). Additional trivial question, what's the standard GPM and PSI of fire water that comes from the fire trucks? Thank you very much, Engineers, Professors, Firemen thanks frank but it doesn't lead me any where. there are a lot of topics under fluid dynamics... what specific topic should i look...
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