Which copper tube type is the heaviest?

Which copper tube type is the heaviest?

• A. Type M
• B. Type L
• C. Type K
• D. Type DWV

Answer: (C)

The weight of copper tubing is driven by wall thickness—the thicker the wall, the heavier the tube per foot. In standard plumbing copper types, Type K has the thickest wall, followed by Type L, then Type M. Type DWV is a drainage-specific tubing and isn’t designed for pressurized potable-water applications, so its thickness isn’t the benchmark for weight in the same way. Because of its thickest wall, Type K weighs the most per unit length, making it the heaviest option among the choices.

The weight of copper tubing is driven by wall thickness—the thicker the wall, the heavier the tube per foot. In standard plumbing copper types, Type K has the thickest wall, followed by Type L, then Type M. Type DWV is a drainage-specific tubing and isn’t designed for pressurized potable-water applications, so its thickness isn’t the benchmark for weight in the same way. Because of its thickest wall, Type K weighs the most per unit length, making it the heaviest option among the choices.