What must be ensured about the pipe connecting the septic tank to the distribution box (D-box)?

The connection between the septic tank and the distribution box (D-box) is critical for the effective functioning of the septic system. The requirement that the pipe must be level for the first 2 feet ensures that waste and effluent can flow properly from the septic tank into the D-box without being impeded by gravity issues that might arise from an abrupt slope. A level section helps in preventing any backflow or stagnation of liquid, which could lead to potential blockages or ineffective distribution of effluent into the drain field.

In systems where the initial section of pipe is improperly sloped, it can create problems such as uneven distribution of flow to the drain field or excessive strain on the system. Unlike other options, which may not pertain to standard practices or requirements for septic systems, ensuring that the pipe is level at the outset serves a foundational role in promoting effective drainage and maintaining system integrity.