What types of materials can settle in sewer lines leading to potential blockages?

Organic and inorganic debris can settle in sewer lines and lead to potential blockages due to their composition and how they interact with wastewater. Organic debris includes materials such as food scraps, grease, hair, and paper products, which can accumulate over time, especially when combined with fats and oils in the sewage. This accumulation can form clogs that restrict or block the flow of wastewater.

On the other hand, inorganic debris, which includes items like plastic wrappers, sanitary products, and other non-biodegradable materials, can also contribute to blockages. These materials do not break down easily in the sewer system and can combine with organic debris to form significant blockages.

In comparison, other materials mentioned, such as gravel, sand, plastic, rubber, glass, or metal, are less likely to be found in significant quantities in sewer systems compared to organic and inorganic debris. For instance, while gravel and sand can enter the system from construction activities, they are not typical everyday contributors to blockages when compared to the more common organic and inorganic materials.