Once the D-box lid is removed, inspect the interior to identify the blockage. A septic distribution box (D-box) is a concrete or plastic junction that evenly distributes wastewater from your septic tank to all drainfield lateral lines. When it fails, symptoms include uneven wet spots in the yard, slow indoor drains, and sewage odors. When this critical component becomes blocked, wastewater may back up into the home, flood the drainfield, or contaminate surrounding soil and. In this guide, I have discussed ten of the common problems with a septic tank distribution box (D-box) and how to fix them. Clogging If you've had your septic system for a while, you have probably run into clogs from time to time.
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