Engineering worksheet
Fire Pump Selection Worksheet
A fire pump worksheet for demand flow, discharge pressure, elevation adjustment, horsepower screening, NPSH review, and water supply coordination.
fire pump selection worksheet3 workflow phases5 linked tools5 required inputs
Workflow phases
3
Ordered job steps
Linked calculators
5
Tools used by the worksheet
QA gates
3
Review checkpoints
Worksheet input matrix
Trace each required value to its source before running linked calculators.
| Group | Field | Source | Required | Used for |
|---|---|---|---|---|
| Demand basis | Sprinkler demand | NFPA 13 hydraulic worksheet or system demand calculator | Required | Rated flow screen |
| Demand basis | Hose allowance | Project criteria | Required | Total pump flow |
| Demand basis | Required system pressure | Hydraulic demand point | Required | Discharge pressure |
| Pump review basis | Total head | Pressure conversion or pump selection basis | Required | Horsepower |
| Pump review basis | Efficiency | Manufacturer or screening assumption | Required | Horsepower |
| Pump review basis | Suction head and losses | Water supply and suction pipe review | Conditional | NPSH screen |
Worksheet workflow
Run phases in order so the worksheet answers the full job intent, not only one formula.
| Phase | Objective | Actions | Linked tools | Acceptance gate |
|---|---|---|---|---|
| 1. Import demand | Start with sprinkler demand and water supply basis before pump screening. | Import sprinkler demand, Add hose allowance, Confirm required pressure and elevation | Demand basis is traceable to hydraulic screening or project criteria. | |
| 2. Screen pump output | Estimate rated flow, discharge pressure, and horsepower. | Calculate pump sizing, Convert pressure/head as needed, Calculate horsepower, Round to standard motor size | Pump flow, pressure, and horsepower are documented as screening values before curve review. | |
| 3. Review suction condition | Check suction head and NPSH assumptions before accepting pump arrangement. | Enter suction head, Enter friction and vapor pressure losses, Compare NPSH available to required NPSH | NPSH margin is flagged for professional review if narrow or negative. |
Worksheet QA gates
Use these gates before the worksheet result is used for design coordination or review.
| Gate | Check | Evidence |
|---|---|---|
| Demand basis | Pump sizing starts from a documented sprinkler demand and pressure point. | Demand basis input group |
| Curve review boundary | Outputs are treated as screening before manufacturer curve acceptance. | Pump output phase |
| Suction review | NPSH assumptions are documented and reviewed separately from discharge demand. | NPSH output and suction input group |
Records to keep
1Pump flow and discharge pressure screen
2Horsepower estimate
3NPSH review record
4Water supply and demand review record
Authority records
Document jurisdiction, AHJ, submittal, inspection, or edition-basis records before final project reliance.
Engineering disclaimer
NFPA in USA provides engineering workpapers, calculation checks, and reference tables for project screening and coordination. Final design decisions, code interpretations, submittals, and acceptance records must be completed by qualified professionals and verified against the adopted code, project criteria, listings, and Authority Having Jurisdiction requirements. This site does not issue signed or sealed engineering documents.FAQ
What is the fire pump selection worksheet for?+
It organizes a complete preliminary engineering check across inputs, linked calculators, reference tables, QA gates, and retained deliverables.
Can this worksheet replace a sealed calculation package?+
No. It is a structured screening and coordination worksheet. Final design, code interpretation, and submittal documents must be reviewed by qualified professionals and the AHJ.
Why use a worksheet instead of a single calculator?+
A single calculator answers one formula. A worksheet follows the job workflow, keeps input sources visible, links the required tools, and records the review gates before project use.