A 12-inch burst water pipe affected roads in Bromley on Thursday morning.
The A21 Bromley Common between Homesdale Road and Crown Lane Spur had to be closed in both directions.
A broken main in Masons Hill on Wednesday also left around 100 homes water-less.
Thames Water has apologised to locals and reported that it was a “complicated repair”. They set up a bottled water station in the area and also hand delivered water to customers on the priority services register.