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NFPA 17A, Standard for Wet Chemical Extinguishing Systems

2021 NFPA 17 Standard - Current Edition
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  • Description

    The 2024 edition of this publication is now available. To purchase, please call 1-800-344-3555 or email your purchase orders to orders@nfpa.org for processing.

    Help ensure wet chemical fire extinguishing systems are ready to perform as intended by referencing the most current NFPA 17A requirements.

    Fire suppression systems and equipment play a critical role in reducing loss and protecting lives in the event of an emergency. NFPA 17A, Standard for Wet Chemical Extinguishing Systems, provides requirements for designing, installing, operating, testing, and maintaining these systems through their life cycle.

    Provisions focus on helping to improve the integrity and reliability of equipment designed to discharge wet chemicals from fixed nozzles and piping by means of expellant gas. Content is relevant to systems utilized in restaurants and institutional hoods, plenums, ducts, and related cooking appliances, covering everything from components to plans and acceptance testing and inspection, maintenance, and recharging.

    The 2021 edition focuses on the information you need to more accurately and easily apply the standard in the field.

    NFPA 17A is a must-have for anyone who purchases, designs, installs, tests, inspects, approves, lists, operates, or maintains pre-engineered wet chemical fire extinguishing equipment. Major revisions to the 2021 edition include:

    • Addition of a chapter addressing wet chemical extinguishing systems for mobile equipment
    • New Chapter 6 paralleling similar requirements in NFPA 17, Standard for Dry Chemical Extinguishing Systems, and addressing issues specific to wet chemical extinguishing systems (the application of the standard was previously limited to the protection of cooking equipment and its exhaust systems)
    • New provisions on the methodology of how to test for blocked piping
    • New criteria specifying that impairments be communicated in a timely manner
    • Modified language throughout the standard to correlate information between NFPA 96, Standard for Ventilation Control and Fire Protection of Commercial Cooking Operations, and NFPA 17A

    Be prepared to safeguard people and property by staying up to date with the latest design considerations relevant to wet chemical extinguishing systems.

    Make sure you are compliant with NFPA 17A, Standard for Wet Chemical Extinguishing Systems, 2021 edition, by placing your order today.

  • Table of Contents (2021 Current Edition)

    NFPA® 17A Standard for Wet Chemical Extinguishing Systems, 2021 Edition

    Chapter 1 Administration
    1.1 Scope.
    1.2 Purpose.
    1.3 Application.
    1.4 Retroactivity.
    1.5 Equivalency.
    1.6 Units and Formulas.
    1.7 Qualifications.
    Chapter 2 Referenced Publications
    2.1 General.
    2.2 NFPA Publications.
    2.3 Other Publications.
    2.4 References for Extracts in Mandatory Sections.
    Chapter 3 Definitions
    3.1 General.
    3.2 NFPA Official Definitions.
    3.3 General Definitions.
    Chapter 4 Components
    4.1 General.
    4.2 Detectors.
    4.3 Discharge Nozzles.
    4.4 Operating Devices.
    4.5 Pipe and Fittings, Tubing, and Hose.
    4.6 Wet Chemical.
    4.7 Electrical Wiring and Equipment.
    4.8 Indicators.
    4.9 Assembly.
    Chapter 5 System Requirements
    5.1 General.
    5.2 System Actuation.
    5.3 Supervision.
    5.4 System Location.
    5.5 Discharge Nozzles.
    5.6 Special Requirements.
    Chapter 6 Systems for the Protection of Mobile Equipment
    6.1 General.
    6.2 Components.
    6.3 System Requirements.
    Chapter 7 Plans and Acceptance Tests
    7.1 Specifications.
    7.2 Review and Certification.
    7.3 Plans.
    7.4 Approval of Installations.
    Chapter 8 Inspection, Maintenance, and Recharging
    8.1 General.
    8.2 Owner’s Inspection.
    8.3 Maintenance.
    8.4 Recharging.
    8.5 Hydrostatic Testing.
    8.6 Service Collar.
    Annex A Explanatory Material
    Annex B Vehicle Fire Suppression Systems
    Annex C Systems for Protection of Residential Stoves When Used in Other than Commercial Cooking Operations
    Annex D Informational References
  • 2017 Edition Description

    Install, inspect, test, and maintain wet chemical extinguishing systems correctly using NFPA 17A.

    The 2017 edition of NFPA 17A, Standard for Wet Chemical Extinguishing Systems outlines the latest rules for wet chemical extinguishing systems associated with restaurant and institutional hoods, plenums, ducts, and associated cooking appliances.

    Maximize equipment integrity and reliability with coverage for:

    • Components
    • System requirements
    • Plans and acceptance tests
    • Inspection, maintenance, and recharging

    The 2017 edition of NFPA 17A presents:

    • New requirement for the Authority Having Jurisdiction (AHJ) to approve used components in the system 
    • New requirement for a placard to be placed near all Class K portable fire extinguishers, indicating that the fire protection system must be activated before a portable fire extinguisher is used
    • Better correlation with NFPA 96, Standard for Ventilation Control and Fire Protection of Commercial Cooking Operations through reduced redundancies
    • Added Annex material identifying the areas of protection for the discharge nozzles 

    This edition of NFPA 17A is essential for manufacturers, installers, and AHJs. (Print, 19 pp., 2017)

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