1.Previous
3.Next

the trunks were weakened by corrosion. Additionally, there was an increased pressure requirement due to increasing water demand, as well as an increase in external stresses due to vehicle traffic. These problems were exacerbated by a lack of system redundancies which limited preventive maintenance, resulting in an increasing number of leaks. The ring main extended the operational life of the high-level trunks by reducing the demand placed on them, and, by providing an increased level of redundancy, enabled them to be more easily isolated and

1.Previous
3.Next