What color is the stripe of medium-walled (Type L) copper tubing?

The stripe on medium-walled (Type L) copper tubing is blue. Type L copper tubing is commonly used for various plumbing applications, including both residential and commercial installations. This specific color coding is important for identifying the type and gauge of the tubing, which helps contractors and installers ensure they are using the correct materials for their projects.

Knowing the different types of copper tubing, including Type K (with a green stripe, used for more specialized applications requiring thicker walls) and Type M (with a red stripe, typically used for specific applications such as residential water supply), helps in avoiding confusion when selecting materials. The blue stripe on Type L tubing indicates its medium wall thickness, differentiating it from other types used in plumbing, heating, and chilling systems. Understanding this color coding system is essential for anyone involved in plumbing to ensure compliance with building codes and to guarantee the integrity of the plumbing systems they install or maintain.