What hose connection must Class I standpipe systems have?

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Multiple Choice

What hose connection must Class I standpipe systems have?

Class I standpipe systems are designed for firefighter use, so they provide a single 2½-inch hose connection. This size matches standard fire department hose fittings and allows the higher flow needed to suppress a structure fire. Other sizes (such as 1½ inches) are used for different standpipe classes intended for occupant use or mixed applications, but they do not meet the requirements of Class I. A system with multiple smaller connections or with a combination would not offer the standard 2½-inch outlet that Class I requires.

Class I standpipe systems are designed for firefighter use, so they provide a single 2½-inch hose connection. This size matches standard fire department hose fittings and allows the higher flow needed to suppress a structure fire. Other sizes (such as 1½ inches) are used for different standpipe classes intended for occupant use or mixed applications, but they do not meet the requirements of Class I. A system with multiple smaller connections or with a combination would not offer the standard 2½-inch outlet that Class I requires.

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