 The Grand Junction Waterworks Company built a pumping station near Kew Bridge at Brentford in 1838 to house its new steam pump and two similar pumps purchased from Boulton, Watt and Company in 1820.The water was taken from the middle of the river and pumped into filtering reservoirs and to a high water tower to provide gravity feed to the area.A six to seven mile (11 km) main took the water to a reservoir on Campden Hill near Notting Hill capable of containing 6 million gallons.