What is the minimum depth of clean fill required over a sewer pipe before completing backfill?

The minimum depth of clean fill required over a sewer pipe before completing backfill is 12 inches. This requirement is essential to ensure that there is adequate coverage over the sewer pipe to protect it from potential surface loads and to prevent damage from any future construction activities or ground movement.

A depth of 12 inches provides sufficient cushion and support for the pipe, helping to minimize the risk of collapse or deformation caused by external pressures. Additionally, this depth allows for proper drainage and prevents the accumulation of surface water that could lead to erosion or other issues related to moisture.

In plumbing practices, adhering to specified fill depths is crucial for maintaining the integrity and functionality of plumbing systems. It not only ensures compliance with building codes and regulations but also promotes long-term sustainability of the sewer line infrastructure.