The following types of systems are addressed within the scope of NFPA 25, Inspection, Testing, and Maintenance of Water-Based Fire Protection Systems…

NFPA 25 establishes the minimum requirements for the inspection, testing, and maintenance (ITM) of water-based fire protection systems. The scope of the standard explicitly includes sprinkler systems, standpipe and hose systems, and foam-water systems. Wet chemical systems, which are primarily used for commercial cooking applications, are not water-based systems. Their ITM requirements are addressed by a separate standard, NFPA 17A, Standard for Wet Chemical Extinguishing Systems. Therefore, wet chemical systems fall outside the scope of NFPA 25.

A. Sprinklers: Sprinkler systems are a primary type of water-based system and are explicitly covered within the scope of NFPA 25.

B. Standpipe and hose: Standpipe and hose systems are water-based and are explicitly listed as being covered by NFPA 25.

D. Foam water: Foam-water systems use water as a primary component and are explicitly included in the scope of NFPA 25.

1. NFPA 25, Standard for the Inspection, Testing, and Maintenance of Water-Based Fire Protection Systems, 2023 Edition. Section 1.1.1, "The types of systems addressed by this standard include, but are not limited to, sprinkler, standpipe and hose, fixed water spray, private fire service mains, fire pumps, water storage tanks, and foam-water systems."

2. NFPA 17A, Standard for Wet Chemical Extinguishing Systems, 2021 Edition. Section 1.1, Scope, "This standard provides the minimum requirements for the design, installation, operation, testing, and maintenance of pre-engineered wet chemical fire-extinguishing systems..."