Which statement about Types K and L is true?

• A. They are available in rigid sections only
• B. They are available in both rigid sections and soft tubing
• C. They are blue and red coded
• D. They are never used for underground applications

Answer: (B)

Types K and L describe copper tube grades, and you’ll see them offered in both rigid (hard drawn) form and soft (annealed) tubing. That flexibility lets you use the tubes for straight runs or with bends without needing fittings or additional processes. The color coding isn’t limited to just blue and red for these two; Type L is blue, Type K is green, and Type M is red. So saying they’re blue and red would mix up the standard color codes. They’re also used in underground installations, so saying they’re never used underground is incorrect. The statement that best fits is that Types K and L come in both rigid sections and soft tubing.