What term describes the installation of plumbing components completed prior to fixture installation?

The term that describes the installation of plumbing components completed prior to fixture installation is "Roughing-In." This stage involves the installation of the essential plumbing lines, such as water supply and drainage systems, along with any necessary support structures, such as hangers and brackets, before the final fixtures, like sinks or toilets, are added.

During the roughing-in process, plumbers ensure that all piping is installed at the correct elevations and in compliance with building codes, meaning that there is proper spacing for mechanical systems. This is a critical step because it lays the groundwork for the overall plumbing system and ensures that everything is properly aligned to accommodate the fixtures being installed later.

In contrast, finishing refers to the final touches, such as attaching the actual fixtures and applying fittings, which happens after roughing-in. The other terms, "Plumbing Setup" and "Initial Installation," are not standard terminology within plumbing practices and do not specifically denote the stage of work associated with preparing such components prior to the installation of fixtures.