integrated hydrant system; fire department connection piping
Engineering and firefighting term for a building's internal piping system that allows firefighters to connect hoses and supply water to upper floors.
High-rise buildings are required to have an integrated hydrant system installed.
The fire brigade used the fire department connection piping to spray water on each floor.
Compound of 連結 (connection), 送水 (water supply), and 管 (pipe). The term is a modern technical coinage for firefighting infrastructure.