The final boil advisory caused by a massive water main break has been lifted.A 48-inch pipe burst on Monday evening, causing flooding, a drop in water pressure and a boil advisory for much of central Louisville. The advisory was lifted in phases over the week, but now no longer stands for any part of the city.Louisville Water Company crews are still investigating the cause of the break in the 80-year-old main. The repairs will likely take several days or weeks and could lead to the closure of several lanes of Eastern Parkway.