They serve as the intermediary between the septic tank and the drain field, ensuring that effluent is evenly distributed across the leach lines. When these distribution boxes malfunction, it can lead to a range of problems, including system backups, sewage leaks, and. Distribution box problems occur when wastewater no longer splits evenly between the drainfield lines. The five causes are: a settled or tilted box, outlet clogs from solids carryover, root intrusion or crushed laterals, cracked or deteriorated box structure, and a saturated drainfield that mimics. Septic tank distribution boxes play a crucial role in the functionality of a septic system. Since different leaks mean different things, your remediation approach will need to be designed to match the condition. When this critical component becomes blocked, wastewater may back up into the home, flood the drainfield, or contaminate surrounding soil and. Diagnose problems at the septic system drop box: procedures for troubleshooting leaks, smells, or backups & flooding in the septic system D-box. Septic system D box installation, specifications, inspection, diagnosis, and repair: in this article series about septic system drop boxes we describe the.