Invert
For a pipe or closed conduit this is the lowest point on its interior surface. For a channel it is the lowest point on the channel bed. Levels of inverts are used to define the vertical alignment of pipelines and channels.
For a pipe or closed conduit this is the lowest point on its interior surface. For a channel it is the lowest point on the channel bed. Levels of inverts are used to define the vertical alignment of pipelines and channels.