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
Page role
Use this page for a defined task before moving to the next project record.
- Audience
- Fire protection engineers, Pump contractors, Sprinkler designers, Plan reviewers
- Job
- Sprinkler demand, hose allowance, required pressure, elevation, and water supply data are available.
- Evidence
- Demand basis: Sprinkler demand, Hose allowance, Required system pressure; Pump review basis: Total head, Efficiency
- Output
- Pump flow and discharge pressure screen; Horsepower estimate; NPSH review record
- Next
- Run workflow phases in order, pass QA gates, then open related authority records before project reliance.
Worksheet record summary
Input status, phase records, QA review, and filing notes for the project record.
| Record area | Count | Engineering use |
|---|---|---|
| Inputs | 5 required / 1 conditional | Trace each value to an accepted source before tool use. |
| Workflow phases | 3 | Run phases in order and preserve each record. |
| Linked calculators | 5 | Open linked calculators from the worksheet phase where they belong. |
| QA gates | 3 | Retain review evidence before saving the worksheet record. |
Filing notes
- 15 required inputs and 1 conditional inputs recorded with source basis.
- 23 workflow phases connected to 5 calculator handoffs and 1 reference handoffs.
- 33 QA gates retained before final engineering or AHJ review.
- 44 project records retained for the calculation package.
Worksheet fit check
Confirm the worksheet matches the project record before opening every phase.
| Decision | Use boundary | Record to keep |
|---|---|---|
| Use when | Pump flow, discharge pressure, horsepower, suction, and water supply assumptions must be reviewed together before curve selection. | Demand basis, rated flow screen, discharge pressure, horsepower estimate, suction losses, and NPSH margin. |
| Do not use when | The task is only converting pressure units, estimating horsepower, or checking NPSH for an already selected pump scenario. | Use the specific pump or conversion calculator and keep the source assumptions. |
| Retain record | Keep the worksheet when a pump recommendation, manufacturer review, or plan-review discussion depends on the screening basis. | Flow and pressure screen, horsepower estimate, NPSH review, and water supply coordination record. |
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 |
Worksheet related tools
Checks that calculators, references, and standards are connected to the worksheet phases where they are used.
| Related item | Kind | Worksheet phase | Listed in worksheet | Back link |
|---|---|---|---|---|
| Pressure Unit Converter Pressure Unit Converter | calculator | 2. Screen pump output | Declared | Linked back |
| NPSH Calculator NPSH Calculator for Fire Pump Suction | calculator | 3. Review suction condition | Declared | Linked back |
| Fire Pump Horsepower Calculator Fire Pump Horsepower Calculator | calculator | 2. Screen pump output | Declared | Linked back |
| Fire Pump Sizing Calculator Fire Pump Rated Flow and Pressure Calculator | calculator | 1. Import demand, 2. Screen pump output | Declared | Linked back |
| Sprinkler System Demand Calculator Sprinkler System Demand Calculator | calculator | 1. Import demand | Declared | Linked back |
| NFPA 13 Sprinkler System Calculators NFPA 13 Sprinkler System Calculators | hub | Worksheet standard context | Declared | Linked back |
| Sprinkler Pipe Internal Diameter Reference Sprinkler Pipe Internal Diameter Reference | reference | 3. Review suction condition | Declared | Linked back |
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.