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// CODE SNIPPET

513.2.4 Modification of Existing Hood Systems

2018 Uniform Mechanical Code of Nevada > 5 Exhaust Systems > 513.0 Fire-Extinguishing Equipment > 513.2 Types of Equipment > 513.2.4 Modification of Existing Hood Systems

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An abandoned pipe or conduit from a previous installation shall be removed from within the hood, plenum, and exhaust duct. [NFPA 96:10.2.7.1]

513.2.4.1 Sealing

Penetrations and holes resulting from the removal of conduit or piping shall be sealed with listed or equivalent liquid-tight sealing devices. [NFPA 96:10.2.7.2]

513.2.4.2 Obstructions

The addition of obstructions to spray patterns from the cooking appliance nozzle(s) such as baffle plates, shelves, or a modification shall not be permitted. [NFPA 96:10.2.7.3]

513.2.4.3 System Re-evaluation

Changes or modifications to the hazard after installation of the fire-extinguishing systems shall result in re-evaluation of the system design by a properly trained, qualified, and certified person(s). [NFPA 96:10.2.7.4]

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