Backflow preventer inspections are designed to protect potable water from contamination caused by pressure changes in irrigation systems. During a backflow preventer testing appointment, technicians check whether the device is functioning properly and meeting local plumbing or water authority requirements. Many municipalities require annual backflow inspections to ensure compliance. Identifying issues early helps prevent system failure, water quality concerns, and compliance problems. Regular backflow preventer inspections are a practical part of responsible irrigation system ownership.