2022 NFPA 24 Standard for the Installation of Private Fire Service Mains and Their Appurtenances

NFPA 24, Standard for the Installation of Private Fire Service Mains and Their Appurtenances 2022 edition establishes minimum requirements for the installation of private fire service mains supplying sprinkler systems, water spray systems, foam systems, and private hydrants. Coverage includes pipe materials and joints, underground installation, valves, backflow preventers, fire department connections, post indicator valves, hydrants, and flushing and testing requirements. The standard is the primary reference for fire protection engineers, designers, and contractors responsible for the underground water supply infrastructure feeding building fire protection systems.

Who Uses NFPA 24

Required by fire protection engineers, sprinkler system designers and contractors, civil engineers, AHJ officials, and inspectors responsible for the design, installation, and acceptance testing of private fire service main systems in commercial, industrial, institutional, and campus environments.

What's New in the 2022 Edition

The 2022 edition adds scope clarifications, new AHJ-approved connection provisions, alternate valve placement criteria, and updated flushing requirements, including:

• Scope clarification added confirming NFPA 24 does not apply to dry fire hydrants used for drafting.
• New Chapter 5 provision permitting a single fire department connection to supply multiple buildings where approved by the AHJ.
• Alternate distance criteria added in Chapter 6 for post indicator valves and backflow preventers.
• New Chapter 10 section clarifying that flush rates from NFPA 20 must be used where a fire pump is connected to the water supply.
• New alternate cleaning procedure added as an option in place of traditional flushing methods.
• New annex material providing guidance for determining ice thickness where water is drawn from a source exposed to freezing conditions.

Stay compliant with the private fire service main installation requirements in effect for your jurisdiction.

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