Crossness Pumping Station at east London ( ) near river Thames contains four big sewage pumping engines, one of them -- Prince Consort -- restored to working condition. Besides their pure size -- length overall approximately 68 ft (20.4 mtrs) and height 72 ft (22 mtrs) they show two features of special interests: grasshopper counter beam and Corliss valve gear.
The engines are three-cylinder triple expansion engines - upgraded from single cylinder Watt engines (1865) in 1899.
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