... service lines are often the 'forgotten step-child' in water infrastructure management, and if ignored for too long can severely affect the quality and integrity of a utility's distribution system. There are relatively few publications focusing on service lines, and thus the AwwaRF has sponsored a research project to fill the knowledge gap about installation, condition assessment and reliability of service lines, and this report highlights the major findings. This report focuses on residential service lines of 2 in. diameter and smaller.