The standard minimum slope for drainage piping larger than 102 mm is _____.

The standard minimum slope for drainage piping larger than 102 mm is set to ensure that wastewater flows effectively through the pipes, minimizing the risk of blockages and ensuring proper drainage. A minimum slope of 1% (which equates to a fall of 1 cm per meter run) is typically specified for drainage systems of this size. This slope is adequate to facilitate the gravitational flow of liquids while also preventing solids from settling in the pipe, which can occur if the slope is too shallow.

A steeper slope can lead to faster flow rates, but it may also promote turbulence, which can trap solids in the flow. Therefore, the 1% slope is considered the minimum necessary to balance these factors effectively while still complying with general plumbing codes and best practices for drainage.