What is the defining characteristic of Type K copper compared to other types?

Type K copper is defined by its thicker walls compared to other types of copper tubing. This thickness allows it to withstand higher pressures and makes it suitable for specific applications, such as underground and high-pressure systems. The identification of Type K copper often involves color coding, with it typically being colored green, which helps differentiate it from other types like Type L and Type M, each of which has its own specific applications and wall thicknesses.

While other factors like flexibility, thickness, and cost are important attributes of copper tubing, the defining characteristic that distinctly identifies Type K copper is its color coding, which assists maintenance professionals in easily distinguishing between different types and ensuring appropriate usage for plumbing and piping applications.