Frederick Graff

Frederick Graff
Frederick Graff portrait
Born27 August 1775
Died13 April 1847 (1847-04-14) (aged 71)
Philadelphia, Pennsylvania, US
Resting placeLaurel Hill Cemetery, Philadelphia, Pennsylvania, US
OccupationEngineer
Engineering career
Disciplinehydraulic engineer
ProjectsFairmount Water Works

Frederick Graff (27 August 1775 – 13 April 1847) was an American hydraulic engineer who designed and built the Fairmount Water Works in Philadelphia, Pennsylvania, and unofficially invented the fire hydrant.