What color is the stripe on the thickest walled (Type K) copper tubing?

Type K copper tubing is recognized for its thicker walls and is typically used for applications that require high durability and superior strength, such as underground lines for water service and in heating systems. The color coding plays an important role in identifying the type of copper tubing at a glance.

The stripe on Type K copper tubing is green, which distinguishes it from other types of copper tubing, such as Type L (which has a red stripe) and Type M (which features a blue stripe). This color coding system is important for plumbers and contractors to quickly identify the appropriate type of tubing suited for specific applications, ensuring they select materials that meet the requirements for pressure, flow, and installation standards in plumbing systems.

By understanding these codes, professionals can ensure compliance with building regulations and make informed decisions that affect the efficacy and safety of the plumbing system being installed or maintained.