Pressurized line testing at a gas station is a procedure used to ensure the integrity of underground fuel delivery systems, specifically the piping that transports fuel from storage tanks to dispensers. This testing is crucial for detecting leaks that could lead to environmental contamination and ensures compliance with safety and regulatory standards.

During the pressurized line testing process, the fuel lines are pressurized using air or nitrogen. The pressure is maintained for a specified period, and any drop in pressure is monitored. If there is a significant drop, it indicates a potential leak or weakness in the system. The testing helps identify issues before they can cause environmental harm or safety hazards.

Regular pressurized line testing is a key part of tank management practices at gas stations, helping to minimize the risk of fuel leaks and ensure the safe operation of the fueling system.