Which of the following is NOT a type of sewage transfer hose?

The choice indicating "Rigid" as a type of sewage transfer hose is correct because sewage transfer hoses are typically designed to be flexible or collapsible, allowing for easier handling and effective storage. The common types of sewage transfer hoses include collapsible, flexible, and in some contexts, non-collapsible variants, which can conform to various operational needs while ensuring efficient flow and management of sewage.

Rigid hoses would not offer the adaptability needed in environments where flexibility is essential, such as maneuverability in tight spaces or during the process of packing away after use. Therefore, while some hoses may have a firmer structure in certain applications, the categorization of sewage transfer hoses generally excludes rigid types, focusing instead on those that accommodate the need for movement and adaptability during use.