"A standpipe is a type of rigid water piping which is built into multi-story buildings in a vertical position or bridges in a horizontal position, to which fire hoses
can be connected, allowing manual application of water to the fire.
Within the context of a building or bridge, a standpipe serves the same
purpose as a fire hydrant.When standpipes are fixed into buildings, the pipe is in place
permanently with an intake usually located near a road or driveway, so
that a fire engine can supply water to the system. The standpipe extends into the building to supply fire fighting
water to the interior of the structure via hose outlets, often located
between each pair of floors in stairwells in high rise buildings. Dry
standpipes are not filled with water until needed in fire fighting."