Which type of copper tubing is acceptable for use in propane systems?

Type K and Type L copper tubing are commonly accepted for use in propane systems due to their appropriate wall thickness and pressure ratings. Type K has the thickest walls among the commonly used types, making it suitable for higher pressures and more demanding applications. Type L, while slightly thinner than Type K, also possesses a robust wall thickness sufficient for use in propane installations.

Both Type K and Type L meet the necessary requirements for safety and durability in propane applications, which is crucial for maintaining the integrity of the propane system and preventing leaks. In contrast, Type A, Type B, and Type M have more limited applications and do not provide the necessary strength or pressure tolerance that is critical in propane systems, making them less suitable for this purpose.