What do the vertical pipes in a standpipe system typically refer to?

Vertical pipes in a standpipe system are known as risers. They are essential components designed to transport water from a water source, typically at the ground level, to various floors or levels in a building. The risers provide firefighters with quick access to water during an emergency, allowing them to connect hoses at different points throughout the building for effective firefighting operations.

Risers can be either wet or dry systems, depending on whether they are always filled with water or only filled upon activation. This structure ensures that water is readily available when needed, which is a critical aspect of fire safety in high-rise buildings or large complexes. The proper functioning and maintenance of these risers are crucial for the safety of both occupants and responders during a fire emergency.