Engineering work procedure

Fire Pump Sizing Workflow

Screen fire pump flow, pressure, elevation, and horsepower before detailed pump selection and curve review.

Page role

Use this page for a defined task before moving to the next project record.

Audience: Engineers, designers, contractors, technicians, and reviewers following a tool-backed workflow.
Job: Screen fire pump flow, pressure, elevation, and horsepower before detailed pump selection and curve review.
Evidence: Sprinkler demand, hose allowance, required system pressure, and elevation basis imported from hydraulic review.; Available water supply, required residual pressure, and suction condition notes before pump screening.; Pump rated flow, discharge pressure, total head, efficiency, horsepower, and rounded motor size.
Output: Pump flow and pressure start from reviewed sprinkler demand and water supply context.; Horsepower is treated as a screening estimate before manufacturer curve review.; NPSH review is separate from discharge pressure and includes suction losses.
Next: Start with the related worksheet, run the linked calculators, then retain reviewed values before project use.

1Open the worksheet first when the guide spans multiple calculations or review gates.
2Use each linked calculator only after the input source for that step is known.
3Keep warning states, assumptions, and review notes with the project record.
4Move to the handoff panel after the guide sequence is complete.

Follow the sequence as an engineering workflow: each phase lists the action, tools, and evidence to retain before moving forward.

Phase	Action	Tools	Evidence to keep
Step 1	Define sprinkler and hose demand.	Fire Pump Rated Flow and Pressure Calculator	Document the source used to start the Engineering workflow.
Step 2	Determine required discharge pressure at the pump.	Fire Pump Rated Flow and Pressure Calculator, Fire Pump Horsepower Calculator	Keep calculation notes showing how this step supports: determine required discharge pressure at the pump.
Step 3	Account for elevation and friction loss.	Fire Pump Rated Flow and Pressure Calculator, Fire Pump Horsepower Calculator, Available Water Supply Calculator	Keep calculation notes showing how this step supports: account for elevation and friction loss.
Step 4	Estimate horsepower from flow, head, and efficiency.	Fire Pump Rated Flow and Pressure Calculator, Fire Pump Horsepower Calculator, Available Water Supply Calculator	Keep calculation notes showing how this step supports: estimate horsepower from flow, head, and efficiency.
Step 5	Compare against listed pump ratings and water supply data.	Fire Pump Rated Flow and Pressure Calculator, Fire Pump Horsepower Calculator, Available Water Supply Calculator	Record the reviewed output, warning state, and next review decision.

1Sprinkler demand, hose allowance, required system pressure, and elevation basis imported from hydraulic review.
2Available water supply, required residual pressure, and suction condition notes before pump screening.
3Pump rated flow, discharge pressure, total head, efficiency, horsepower, and rounded motor size.
4NPSH margin, manufacturer curve boundary, and fire pump worksheet review notes.

1Pump flow and pressure start from reviewed sprinkler demand and water supply context.
2Horsepower is treated as a screening estimate before manufacturer curve review.
3NPSH review is separate from discharge pressure and includes suction losses.
4Pump selection remains preliminary until curve, water supply, and AHJ/project criteria are resolved.

1Open the fire pump selection worksheet before using pump flow or horsepower as a recommendation.
2Use available water supply and NPSH tools before treating discharge pressure as acceptable.
3Keep manufacturer curve review separate from calculator screening output.
4Route unresolved suction, water supply, or edition questions to authority workflows.

Fire Pump Sizing Workflow

1Open the fire pump selection worksheet before using pump flow or horsepower as a recommendation.
2Use available water supply and NPSH tools before treating discharge pressure as acceptable.
3Keep manufacturer curve review separate from calculator screening output.
4Route unresolved suction, water supply, or edition questions to authority workflows.