In new buildings (less than 5 years), the plumb lines are usually already separated by apartment. The great challenge of the individualization in old buildings is the hydraulic work, because it is necessary to unify the plumb lines. For this type of undertaking, there is no possibility without a renovation. It is important to point out that, in buildings whose construction time needs a replacement of water columns, the possibility of individualizing instead of replacing the columns should be considered. A new pipe is placed and the old column ceases to have function.