The Water Research Centre (WRc) released the 1st Manual of Sewer Condition Classification (MSCC) in the United Kingdom back in the 1980’s. The differing versions have evolved over the years and is currently in the 5th edition (the 2nd edition based on the EN coding standards). Using the codes allows camera operators to log observations cleanly and consistently from pipe to pipe, inspection to inspection over time. Supervisors and engineers can compare defects from different parts of their collection system, inspected by different operators on different days, using their computers to score and grade allowing consistent analysis.