Centre Square Water Works, Frederick Graff, Sr. Plans, 1799
Centre Square Water Works, Latrobe Plans, 1799
Fairmount and vicinity, 1839
Isometrical View of Fairmount Water Works, 1843
Steam engine drawing, Frederick Graff Sr., 1815
Pipes, distribution mains, transmission mains, filtration plants, pumping stations, and all other appurtenances, either above or underground, that relate to providing drinking water to homes and businesses. In tandem with sewer systems, properly-designed water supply systems are what make densely-populated urban areas possible.