Leach lines are the perforated pipes that carry treated effluent from a septic tank to the leach field. They are typically laid in trenches filled with gravel, allowing the effluent to drain evenly into the soil. Leach lines are an integral part of septic system design, ensuring that wastewater is distributed over a wide area to prevent soil saturation, promote natural filtration, and reduce the risk of groundwater contamination. Proper sizing, spacing, and installation of leach lines are essential for the effective operation of a septic system. Regular inspection and maintenance help prevent clogs, root intrusion, and other issues that could impair the system’s performance.
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