Standpipe systems are built to deliver water in buildings so firefighters can connect hoses quickly. Class I systems provide 2½-inch hose connections for fire department use, commonly found in stairwells of high-rise buildings. Class II systems have 1½-inch hose stations intended for trained occupants or staff for early fire control. Class III systems combine both 2½-inch and 1½-inch outlets, allowing use by either firefighters or trained occupants.

In my experience, I’ve benefited from standpipe systems during building calls by using the Class I outlet in the stairwell as a reliable water supply. It helped us avoid stretching long hose lines from the engine, improved setup time, and supported safer, faster fire attack on upper floors.