HMWSSB has completed repairs to major leaks in the 105-year-old raw water conduit from Osman Sagar reservoir six hours ahead of schedule. More than 90 per cent of leaks at eight critical locations were controlled during a 36-hour shutdown. Hyderabad: Hyderabad Metropolitan Water Supply and Sewerage Board (HMWSSB) completed repairs to major leaks in the 105-year-old conduit carrying raw water from the Osman Sagar reservoir to Hyderabad six hours ahead of schedule.