The Mourne Conduit was a water main which ran 42 kilometres (26 mi) from the Silent Valley Reservoir to Carryduff, near Belfast and was built between 1893 and 1901 for the Belfast City and District Water Commissioners.[1] This was supplemented by additional pipelines twice in the 20th Century.[1] This system supplied water to Greater Belfast and North Down for more than 100 years. It is labelled as the Mourne Aqueduct in Ordnance Survey maps from the early 20th century.
This system was replaced by the Aquarius Line, a dual pipeline between the Mourne Mountains and the Purdysburn Service Reservoir in Belfast which was constructed along with associated infrastructure as part of the Aquarius Mourne Water Project. The system provides water to approximately 20% of Northern Ireland's population.[2]