Answer:
Roughed-in plumbing refers to plumbing (water and waste lines) installed for future fixtures, for example, a bathroom in a basement. Stops refer to shut-off valves on water supply lines, required to shut-off the water to repair the fixture that they service. So "Rough-in stops" are shut-off valves on supply lines that are roughed-in. If they were not roughed-in, you would need to break concrete floor (to install waste lines) if/when you decided to add a bathroom to your basement family room.