What tool is used to de-burr copper tubing?

The correct answer is the deburring tool. This specialized tool is designed to remove sharp edges and burrs that are created when cutting copper tubing. When a pipe cutter slices through the tubing, it can leave jagged edges on the inside and outside of the cut, which can hinder the proper fit of fittings and could potentially lead to leaks in a plumbing system. The deburring tool efficiently smooths these edges, ensuring a clean, even surface that is crucial for proper installation and functioning of HVAC systems.

Other tools mentioned serve different purposes. A pipe cutter is primarily used to make precise cuts in the tubing, while a reamer, although it can smooth edges in some contexts, is typically used for enlarging or finishing the interior of the pipe. A tube bender is used to create bends in tubing without causing kinks or damage, but it does not remove burrs. Each of these tools has its own specific function, emphasizing the necessity of using the right tool - in this case, the deburring tool - for the intended task of preparing copper tubing for connections or fittings.