Where are outside stem and yokes normally located?

Outside stems and yokes are typically located inside a mechanical room linked to a standpipe or sprinkler system. Their primary function is to provide an accessible means of controlling the water supply to these systems. In a mechanical room, firefighters and maintenance personnel can readily access the components necessary for emergency operations or routine service.

The choice of a mechanical room allows for the protection of the equipment from the elements and also minimizes the risk of tampering or accidental use outside of planned operations. This location is strategic, ensuring that the equipment is functional yet secure. Often, the layout of a building’s fire protection system necessitates that these components be located in a centralized area where they can be quickly reached in case of emergencies.