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1926 The Vyrnwy Aqueduct carrying water from Lake Vyrnwy to Liverpool is divided into a number of sections, of which the upper section, between Vyrnwy and Oswestry, carried unfiltered water. That section (21km in length) was a double line of 160cm diameter pipes, with capacity less than that of the sections below Oswestry. At the beginning of the year the Water Committee of Liverpool Corporation decided to start work to increase capacity of part of the aqueduct between the lake and Oswestry by adding an extra pipe of 7km length in parallel with the existing line