Kempton Park Steam Engines
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The Kempton Park Steam Engines (also known as the Kempton Great Engines) are two large triple-expansion steam engines, at the Kempton Park waterworks, Middlesex, London. Each engine is of a similar size to that used in RMS Titanic and rated at about 1008hp. They each pumped 19 million gallons of water a day, to supply north London with drinking water taken from the River Thames. They were finally retired from service in 1980.
One of the engines, called "The Sir William Prescott", has been restored to running order and is the largest fully-operational triple-expansion steam engine in the world. It may be seen in steam on various weekends during the year. The engine house also houses two steam turbine water pumps.
The waterworks is adjacent to the A316 (just before it becomes the M3 motorway), between Sunbury-on-Thames and Hanworth.