This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Lantern Slide Tangyes Ltd Gas Engines Deep Well Pumps Welwyn Garden City circa . Diagram of the Welwyn Garden City Water Works showing cross section of engine house and well Installation consists of two sets of Tangye gas enginedriven treblebarrel deep well pumps delivering combined output of gallons per hour over total head