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Philadelphia Water Department
Centre Square Water Works, Frederick Graff, Sr. Plans, 1799
Pipeline being laid in Wissahickon Avenue
PWD Drinking Water Treatment diagram
Steam engine drawing, Frederick Graff Sr., 1815
Wooden Water Pipe, removed from Market Street, December 6, 1901
1903 Proceedings of the Engineers’ Club title page
Lab tech, water cleaning demo, Philly Home Show, 1960
Torresdale Conduit work gang, 12/18/1906
Finished Upper Roxborough filters, 1903
Apparatus for testing model turbine wheels used at Fairmount, 1859-60
Duplex Pumping Engine, Belmont Works
Electric Pump Installations at Lardner’s Point Pumping Station
Engine House, Belmont Works
New Mill House at Fairmount
Laboratory Alkalinity test, ca. 1943
Plan for the Collection, Treatment and Disposal of Sewage, 1914
Pennypack Sewage Treatment Works, 1914
Jonval Turbines at New Mill House, 1870