How deep are leach lines?

Leach lines, often used in septic systems for wastewater disposal, are typically installed at a depth of 18 to 30 inches below the surface of the ground. The exact depth can vary based on local regulations, soil conditions, and the specific design of the system. It's essential to ensure that the lines are placed below the frost line in colder climates to prevent freezing. Proper installation depth is crucial for effective drainage and environmental protection.