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NFPA 291: Recommended Practice for Fire Flow Testing and Marking of Hydrants
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What is NFPA 291?
NFPA 291: Document Scope

1.1 Scope. The scope of this document is fire flow testing and marking of hydrants.

NFPA 291 provides guidance on fire flow tests and marking of hydrants in order to determine and indicate the relative available fire service water supply from hydrants and to identify possible deficiencies which could be corrected to ensure adequate fire flows as needed.

Official document scope
What does NFPA 291 address?

Provisions provide criteria for determining the rate of flow available at various locations for fire fighting purposes, classifying hydrants in accordance with their rated capacities, and color-coding hydrants to indicate their class. Specific testing coverage includes rating pressure, use of pumper outlets, determination of discharge, calculation results, and system corrections.

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