What type of standpipe is usually found in residential buildings?

In residential buildings, Class II standpipes are typically used because they are designed for use by the occupants or by the fire department to assist with fire suppression in smaller or mid-rise buildings. Class II standpipes provide 1½-inch outlets, which are suitable for individuals who may not have extensive firefighting experience. They usually offer a straightforward means for trained occupants or firefighters to quickly deploy hoses for fire control.

Class I standpipes, on the other hand, are oriented towards trained firefighters and have larger, 2½-inch outlets, often found in commercial or industrial environments. Class III standpipes combine aspects of both Class I and Class II, serving the needs of both firefighters and non-professional users, and are more commonly found in larger buildings. An automatic standpipe system is integrated into a building’s design to activate when a fire is detected and is not specifically tied to the kind of standpipe that would be found in residential buildings.