What type of copper is predominantly used for refrigeration lines?

Type L-ACR copper tubing is predominantly used for refrigeration lines due to its excellent balance of strength and flexibility. This type of copper tubing is specifically designed for air conditioning and refrigeration applications, allowing it to handle the pressures and temperatures encountered in these systems effectively. Type L copper is thicker than Type M, which provides additional durability, making it suitable for various installations, including residential and commercial refrigeration systems.

The designation ACR stands for Air Conditioning and Refrigeration, indicating that this tubing adheres to specific standards required for the HVACR industry. Its construction helps reduce the risk of leaks and ensures a long lifespan even in challenging operating conditions. Type L-ACR copper also allows for ease of bending and soldering, making installation simpler and more efficient.

In contrast, other types, such as Type K or Type M, are more suited for different applications, like plumbing or general use, but do not meet the specific criteria and performance standards necessary for refrigeration systems. Hard-drawn copper, while also strong, is less flexible and typically not as preferred in refrigeration applications where bending and installation in tight spaces might be required.