Which copper tubing types are available in both rigid sections and rolls of soft (annealed) tubing?

• A. Types K & L
• B. Type M
• C. Type K
• D. Type L

Answer: (A)

The concept here is how copper tubing is supplied in different forms: hard drawn (rigid) tube and annealed (soft) tube that can be rolled. Soft copper is easier to bend, so it’s commonly sold in rolls, while rigid tube comes in straight lengths. Among the standard copper tube types, Types K and L are stocked in both forms to cover a wide range of installations—from long, curved runs to precise, tight-fitting sections. The thicker-walled Types K and L are versatile enough to be manufactured and stocked as both rigid lengths and soft coils. Type M, while thinner-walled and cost‑effective for some applications, is not typically offered in soft coil form as readily, and is mainly used in rigid forms. So the tubing types available in both rigid sections and rolls of soft tubing are Types K and L.