NFPA 25
Water Supply Tools
Hydrant and water supply tools for converting pitot readings, plotting supply curve points, and estimating available flow at required residual pressure.
4 tools1 tablesNFPA 25
Workflow tools
4
Interactive calculators
Standard context
NFPA 25
Primary engineering basis
Reference tables
1
Input setup support
Page role
Use this page for a defined task before moving to the next project record.
- Audience
- Users running water supply tools for a known project condition.
- Job
- Move from input evidence to a calculator result, then into a standard hub, worksheet, reference table, or authority review.
- Evidence
- Static pressure, Residual pressure, Test flow, Pitot pressure, Outlet diameter
- Output
- Hydrant flow, Available flow, Supply curve point, Residual pressure check
- Next
- Use the workflow table before opening individual tools; keep reviewed outputs with the project workpaper.
Water Supply Tools workflow
Use this category page as a workflow control surface: confirm entry conditions, run the tools, review quality gates, and keep the records.
| Phase | Workflow step | Inputs | Outputs | Quality gate |
|---|---|---|---|---|
Phase 1 NFPA 25 | Enter hydrant test data, pitot pressure, outlet diameter, static pressure, and residual pressure. | Static pressure, Residual pressure, Test flow | Hydrant flow, Available flow, Supply curve point | Inputs have been checked against drawings, device listings, field test records, or project criteria. |
Phase 2 NFPA 25 | Calculate flow or available water supply using the visible test relationship. | Residual pressure, Test flow, Pitot pressure | Available flow, Supply curve point, Residual pressure check | Outputs including Hydrant flow, Available flow, Supply curve point, Residual pressure check have been reviewed before project use. |
Phase 3 NFPA 25 | Compare supply outputs against sprinkler demand and pump sizing screens. | Test flow, Pitot pressure, Outlet diameter | Supply curve point, Residual pressure check | Warnings, failed screens, or narrow margins are documented before moving to the next workflow. |
Entry conditions
- 1Use this workflow when the task belongs to water supply tools and the controlling project condition is known.
- 2Collect Static pressure, Residual pressure, Test flow, Pitot pressure before opening individual calculators.
- 3Confirm the values are project-specific, field-measured, manufacturer-listed, or selected from linked reference tables.
Records to keep
- 1Water Supply Tools input source checklist.
- 2Reviewed output set: Hydrant flow, Available flow, Supply curve point, Residual pressure check.
- 3Linked reference values used for the calculation basis.
- 4Next-step review note for final calculation package, field review, or submittal check.
Next steps
Choose the water supply calculation by the field record
Use this matrix when a hydrant test or pitot reading needs to become an available-flow or demand-comparison record.
| Project question | Basis to have ready | Open first | Then verify with |
|---|---|---|---|
Hydrant discharge flow point NFPA 25 workflow | Outlet diameter, pitot pressure, discharge coefficient, test location, and flowing outlet record. | Hydrant Flow Test Calculator | Hydrant Flow and Water Supply Worksheet |
Pitot reading conversion NFPA 25 workflow | Pitot pressure, outlet diameter, coefficient, and confirmation that readings came from the same outlet. | Pitot Flow Calculator | Water Supply Curve Plotter |
Available flow at required residual NFPA 25 workflow | Measured test flow, static pressure, residual pressure, and required residual pressure for the demand comparison. | Available Water Supply Calculator | Sprinkler System Demand Calculator |
Water supply curve record NFPA 25 workflow | Static pressure, residual pressure, test flow, required residual, and the same test record for all values. | Water Supply Curve Plotter | Hydrant Flow and Water Supply Worksheet |
Reference tables for this workflow
How to use this category
- 1Confirm the category matches the actual project task before choosing a calculator.
- 2Collect Static pressure, Residual pressure, Test flow, Pitot pressure from drawings, field data, listings, criteria, or linked references.
- 3Run the smallest calculator that answers the immediate question, then review warnings and pass states.
- 4Move reviewed results into a worksheet, standard hub, or authority record; separate downloadable products are optional and only belong where a real workflow product exists.
- 5Use these tools directly without an account; keep the workflow focused on calculations, references, worksheets, and authority records.
Tools in this workflow
| Tool | Workflow role | Input basis | Primary outputs | Open |
|---|---|---|---|---|
Hydrant Flow Test NFPA 25 | Convert hydrant or flow test observations into water supply screening values. | Discharge coefficient, Outlet diameter, Pitot pressure | Hydrant flow | Open |
Pitot Flow NFPA 25 | Convert hydrant or flow test observations into water supply screening values. | Discharge coefficient, Outlet diameter, Pitot pressure | Hydrant flow | Open |
Available Water Supply NFPA 25 | Convert hydrant or flow test observations into water supply screening values. | Measured test flow, Static pressure, Residual pressure | Available flow | Open |
Water Supply Curve Plotter NFPA 25 | Convert hydrant or flow test observations into water supply screening values. | Measured test flow, Static pressure, Residual pressure | Available flow, Static pressure, Residual pressure | Open |