What is the size range for types K and M tubes?

• A. 0.5 to 4 inches
• B. 1/4 to 12 inches
• C. 3/8 to 10 inches
• D. 1/2 to 8 inches

Answer: (B)

The size range for types K and M tubes is indeed 1/4 to 12 inches. Copper tubes in these categories are commonly used in plumbing, refrigeration, and air conditioning applications. The designation of type K refers to the thickest of the copper tube types, while type M has thinner walls. This range allows for versatile usage across various applications where different diameters are required to handle varying volumes of fluids.

Type K tubes are suitable for underground installations and high-pressure applications due to their thicker walls, while type M tubes are frequently used for low-pressure systems, such as heating and cooling, where flexibility and ease of handling are beneficial. The specified size range encompasses both small and larger diameter tubes, making it suitable for a wide array of residential and industrial applications.