What does the invert of a horizontal pipe refer to?

The invert of a horizontal pipe refers to the lowest point of the pipe. In plumbing, the term "invert" is critical when discussing drainage and wastewater systems, as it is crucial to ensure proper flow and drainage. The lowest point is where waste or water will exit the pipe, and understanding the invert is essential for designing systems that prevent blockages and ensure effective drainage. Proper calculation of the invert elevation also helps in determining the slope necessary for gravity-driven flow. This concept is significant in the installation and maintenance of plumbing systems, as incorrect assumptions about the invert can lead to serious drainage issues.