What is a common application for a sewage pump in residential plumbing?

A sewage pump is specifically designed for the purpose of removing wastewater that contains solid waste, particularly from areas of a home where gravity drainage is not feasible, such as basements. In situations where the basement is below the level of the main sewer line, a sewage pump collects the wastewater and pumps it up to the level where it can flow freely into the sewer system. This is essential for maintaining proper sanitation and preventing sewage backflow or flooding in the living space.

In contrast, while rainwater management is important, and kitchen waste disposal involves different types of plumbing systems (e.g., garbage disposals), they do not pertain to the sewage pump's primary function. Similarly, circulating hot water pertains to a different plumbing system focused on heating and HVAC rather than sewage disposal. Therefore, the correct answer emphasizes the critical role of sewage pumps in managing wastewater effectively in residential plumbing, especially in low-lying areas like basements.