What must a seepage bed be at least 6 inches away from?

A seepage bed must be at least 6 inches away from the bottom of the rock-filled bed (often referred to as the rock filtration bed or RFB bottom) to ensure proper drainage and prevent clogging. This spacing allows adequate airflow and prevents soil saturation that can lead to system failure. Maintaining this distance is crucial for the longevity and efficiency of the septic system, as it ensures that effluent can be properly absorbed and filtered by the surrounding soil. This specific measurement is part of the design requirements to protect the septic system's functionality and to comply with state regulations.