Kempton Park Steam Engines

The Kempton Park Steam Engines (also known as the Kempton Great Engines) are two large triple-expansion steam engines, dating from 1926–1929, at the Kempton Park waterworks, London. They were manufactured by Worthington-Simpson. Each engine is of a similar size to that used in RMS Titanic and rated at about 1008 hp. They each pumped 19 million gallons of water a day, to supply north London with drinking water taken from the River Thames. They were the last working survivors when they were finally retired from service in 1980.

The engines are of an inverted vertical triple-expansion type, 62 feet (19 m) tall from basement to the top of the valve casings and each weighing over 800 tons. The engines are thought to be the biggest ever built in the UK.

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. The same site also features a 2-foot gauge steam railway, the Kempton Steam Railway, the largest steam railway offering rides to the public on selected days, in London.

The steam engines now form a museum operated by Kempton Great Engines Trust, a registered charity.

I would just like to set the record straight - TOTP Pan’s People – Tap Turns On The Water, it was filmed at Walton on Thames Pumping Station, the 2 engines featured were No 4 Thames Ironworks Triple expansion engine built in 1911 (still there) and No 6 Hathorn Davey & Co Ltd Triple expansion engine built in 1926, makers name can be seen on the front of the engine. ( Cut up for scrap in late 70's). The Kempton Park engines were built by Worthington Simpson and completed in 1929.

...
Wikipedia