What is the minimum hose inner diameter recommended for use on un-macerated sewage?

The recommended minimum hose inner diameter for use on un-macerated sewage is 1.5 inches. This specification ensures that the system is capable of handling solids present in un-macerated sewage without risk of clogging. A diameter of 1.5 inches provides adequate flow capacity while allowing for the passage of materials that are not ground up, which is critical for maintaining effective drainage and system functionality.

Using hoses with a diameter smaller than 1.5 inches could lead to blockages and inefficiencies, as the potential for accumulation of solids increases. Moreover, larger diameters, such as 2 inches or 2.5 inches, while potentially functional, are not typically necessary for standard applications and could lead to increased costs and bulk in the installation. Thus, 1.5 inches strikes a balance between effective waste management and practical system design.