The distribution box was not sealed
While the distribution box is exposed, seal around all of the pipes going into and coming out of the box. 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. Clogging If you've had your septic system for a while, you have probably run into clogs from time to time. If it's not working properly, you could face serious issues like backups or flooding.
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