sentences:  This was the Western Pumping Station, completed by 1875, and the final part of the main drainage system for London.Four high-pressure condensing beam-engines, housed in a building tall, developing raised sewage by from a low level sewer, to pump it to the Abbey Mills station at Barking.The station could pump 55 million gallons per day (250 Mld), and a backup non-condensing engine was provided in case of failure of any of the main engines.