Which type of device can be used as an alternative to an in-ground dry hydrant?

A Venturi is a device that can be utilized as an alternative to an in-ground dry hydrant because it functions by utilizing the principle of fluid dynamics. Essentially, a Venturi creates a decrease in pressure when the fluid flows through a constricted section of pipe, which can facilitate the suction of water from a source such as a pond or other body of water into the firefighting apparatus.

This method enables firefighters to effectively draw water without the need for a physical installation like a dry hydrant, offering flexibility in various environments where access to a water supply may be limited. In situations where a dry hydrant may be impractical due to site conditions or availability, the Venturi can provide a means to deliver water quickly and efficiently.

While pumps, eductors, and compressors serve various important functions in firefighting, they do not replicate the specific water extraction and suction capabilities in the same manner as a Venturi, making it the more suitable alternative in this context.