Which type of copper tubing requires a mechanical bending tool?

Type L copper tubing is designed to handle a range of applications including water supply and drainage, and it is recognized for its durability and pressurization capabilities. When it comes to bending, Type L is thicker than Type M but thinner than Type K, which gives it the flexibility needed for bends, albeit not as easily done by hand as thinner types.

A mechanical bending tool is recommended for Type L due to its thickness, which ensures that the bends are uniform and help maintain the integrity of the tubing. This prevents kinking and ensures that the plumbing system remains leak-free. The proper bending of the tubing is critical in plumbing applications to avoid any restrictions in the flow of water or damage to the pipe itself.

In contrast, other types like Type M are thinner and can often be bent by hand tools, whereas Type K, being the thickest, also typically requires specialized tools though not necessarily for bending. The mention of Type D could be less common or specific to certain applications not typically covered under the standard copper tube categories.