Engineer Academy · Drill

Pump discharge calculator.

Set the line and the calculator works the pressure the way you would at the panel: NP + FL + AL ± EP. Drill it until the math is instinct.

Drill mode → Pump simulator → What’s wrong? →

Set the pump to

170PSI

Nozzle reaction

76lbs

The work

NP (nozzle pressure): 100 psi

FL (friction loss, 150 gpm through 200′ of 1.75″): 70 psi

PDP = 170 psi

Nozzle

Flow

150gpm

Attack line

Length

200ft

Add a supply line into the attack line

Floor (elevation)

Uses standard IFSTA training coefficients (1.75″ = 15.5, 2.5″ = 2, 5″ = 0.08, …) and the 5-psi-per-floor handline rule. Your department’s hydraulic calculations, apparatus documentation, and SOGs are always the authority on the fireground — this is for practice.