NFPA 291:2025

Chapter 1 Administration
1.1 Scope.
1.2 Purpose.
1.3 Application.
1.4 Units.
Chapter 2 Referenced Publications
2.1 General.
2.2 NFPA Publications.
2.3 Other Publications.
2.4 References for Extracts in Recommendations Sections.
Chapter 3 Definitions
3.1 General.
3.2 NFPA Official Definitions.
3.3 General Definitions.
3.4 Hydrant Definitions.
Chapter 4 Flow Testing
4.1 Water Flow Testing Purposes.
4.2 Rating Pressure.
4.3 Procedure.
4.4 Layout of Test and Procedure to Determine the Available Water Supply in a Water Main.
4.5 Layout of Test and Procedure to Evaluate the Available Flow Through a Fire Hydrant.
4.6 Equipment.
4.7 Test Procedure.
4.8 Pitot Readings.
4.9 Determination of Discharge.
4.10 Use of Pumper Outlets.
4.11 Determination of Discharge Without a Pitot.
4.12 Calculation Results.
4.13 Data Sheet.
4.14 System Corrections.
4.15 Public Hydrant Testing and Flushing.
4.16 Private Hydrant Inspection, Testing, and Maintenance.
Chapter 5 Marking of Hydrants
5.1 Classification of Hydrants.
5.2 Marking of Hydrants.
Annex A Explanatory Material
Annex B Informational References

The scope of this document is water flow testing and marking of hydrants.