The Metropolitan Water Board Railway was a narrow gauge industrial railway built to serve the Metropolitan Water Board's pumping stations Kempton Park and Hampton near London. The line was opened in 1916 and closed shortly after the Second World War. It connected a wharf on the Thames at Hampton to a standard gauge siding off the Shepperton branch at the Kempton end and running via pumping stations and reservoirs on the way. It mainly transported coal but was also used for sand used in the filter beds. By having two inputs coal from the cheapest or most convenient source could be used.