Engineering Calculators

Fire Pump Curve Validation

Compliance Rules

  • Churn (shutoff, 0 GPM) pressure must not exceed 140% of rated pressure.
  • At 150% of rated flow, pressure must be at least 65% of rated pressure.
  • Curve points must span from 0 GPM through at least 150% of the candidate's rated flow.

The candidate pump's nameplate rated flow — the 100% point on its performance curve.

The candidate pump's nameplate rated pressure at its rated flow.

Enter points straight from the pump manufacturer's published performance curve (flow vs. pressure). You need at least the shutoff point (0 GPM) and a point at or beyond 150% of the candidate's rated flow.

Curve Points

The flow your system requires — usually the rated flow from the Demand calculator.

The pressure your system requires — usually the rated pressure from the Demand calculator.