PPolySim OS
For Engineers · Fire Hose Hydraulics

Fire Hose Hydraulics for a search-and-rescue grid

Built for engineers using it for real design work. Go from concept to a running model in the browser, then scale to the cloud when needed. Simulate a search-and-rescue grid live below — adjust the inputs and watch it respond, right in your browser.

Fire Hose HydraulicsLive
Required pump discharge pressure
125psi
100
nozzle
25
friction
0
elevation

Controls

Hose diameter

Presets

Friction loss uses the fireground formula FL = C·(Q/100)²·(L/100), added to nozzle pressure and elevation head to give the required pump discharge pressure. Coefficients are standard single-line values. Verify against your department's charts.

▶ Run in Python

Data Inspector

Friction loss25 psi
Elevation0 psi
Coefficient C2

Governing equation

Reading this result: Friction loss is modest here, so nozzle pressure sets most of the 125-psi discharge the pump must supply.

Runs locally in your browser — free forever. Scale to the cloud when reality gets heavy.

or unlock everything with Pro →

More with Fire Hose Hydraulics

Frequently asked questions

Is this good for engineers?
Yes — this version of "Fire Hose Hydraulics for a search-and-rescue grid" is framed for engineers using it for real design work. Go from concept to a running model in the browser, then scale to the cloud when needed.
Do I need to install anything?
No. It runs in any modern browser, free, with no account required.