Standpipes are pipes that are used for firefighting. They are connected to a water supply, usually a municipal water system, and are used to provide a steady flow of water to firefighters. The standpipe system consists of pipes that are installed in a building and connected to a water supply. When the fire alarm is triggered, the water supply is activated and the water is delivered to the firefighters through the standpipes. The standpipes also provide a direct connection to the water supply, allowing firefighters to access water quickly and easily.