Who developed the first fireplug (hydrant)?

The development of the first fireplug is attributed to Frederick Graff, Sr., who was an influential figure in the early history of firefighting. Graff was responsible for creating a reliable system for accessing and controlling water for fire suppression. His invention represented a significant advancement in firefighting technology by allowing firefighters quick access to water, which was vital for effective firefighting.

Graff's design for the fire hydrant made it more efficient for firefighters to connect hoses and draw water directly from the mains without the need for cumbersome setups. This innovation dramatically improved the response time during fires, ultimately saving lives and property. His contributions laid the foundation for modern hydrant systems we still use today.

The other individuals listed in the question, while historically significant in their own right, were not directly responsible for the invention of the fire hydrant.