Which of the following would be used when packing, pouring and caulking a lead joint in the drainage system?

The correct answer relates to the specific application of the end cleanout in the context of lead joint installation and maintenance within a drainage system. When packing, pouring, and caulking a lead joint, the end cleanout is essential because it provides access for cleaning and maintenance of the drainage line.

The process typically involves using a cleanout fitting that allows for the insertion of tools and materials needed to properly seal the lead joint. An end cleanout facilitates easier access to this important work, ensuring that the lead is adequately packed and any voids are filled appropriately, which is critical for preventing leaks and maintaining the integrity of the drainage system.

In this scenario, the other options do not apply as effectively to the specific task of lead joint work. They may represent different types of cleanouts or fittings that serve other purposes in plumbing systems but do not align with the needs of packing and caulking lead joints as efficiently as the designated end cleanout used here. Thus, selecting the appropriate cleanout is crucial to the successful completion of these plumbing operations.