What is the maximum number of drainage fixtures units allowed on a 4 diameter drain line allowed on a 100mm sewer line?

The maximum number of drainage fixture units (DFUs) allowed on a 4-inch diameter drain line typically depends on local Plumbing codes and the specific type of fixtures being used. Generally, a 4-inch drain line can handle around 24 DFUs. However, for precise calculations and compliance, it is essential to consult the local plumbing code or the plumbing code applicable in your area.