Dry / Wet Stand Pipe Systems Combinations
Dry standpipes 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 supply pipe extends into the building to supply fire-fighting water to the interior of the structure via hose outlets, often located between each floor in stairwells in high rise buildings. Dry standpipes are not filled with water until needed in fire-fighting. Fire fighters often bring hoses in with them and attach them to standpipe outlets located along the pipe throughout the structure.
Wet Standpipes are filled with water and is pressurized at all times. In contrast to dry standpipes, which can be used only by firefighters, wet standpipes can be used by building occupants. Wet standpipes generally already come with hoses so that building occupants may fight fires quickly.