What is the Fireground Hydraulics multi-solver?

Fireground Hydraulics is a guided workflow that chains 1 individual PolySim solvers into one end-to-end analysis, piping each result into the next step.

Yes. Every step runs entirely in your browser using real numerics — no install, no account, no cloud cost. Custom or private solver packs are available as a paid service.

Earth & First Responders Pack · Multi-Solver

Fireground Hydraulics

Hose to pump. This multi-solver chains 1 solvers into a single guided workflow — run each step in order and carry the result forward.

Workflow steps

hose-flow

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Hose Flow

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Fire Hose HydraulicsLive

friction loss · pump discharge pressure

Required pump discharge pressure

125psi

100

nozzle

friction

elevation

Controls

Hose diameter

Presets

Flow (GPM)

Hose length (ft)

Nozzle pressure (psi)

Elevation (ft)

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

PDP = NP + C (\frac{Q}{100})^{2} \frac{L}{100} + 0.434 h = 100 + 25 + 0 = 125 psi

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

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Frequently asked questions

What is the Fireground Hydraulics multi-solver?: Fireground Hydraulics is a guided workflow that chains 1 individual PolySim solvers into one end-to-end analysis, piping each result into the next step.
Is it free to use?: Yes. Every step runs entirely in your browser using real numerics — no install, no account, no cloud cost. Custom or private solver packs are available as a paid service.