Which type of copper pipe has the heaviest wall thickness?

Type K copper pipe is recognized for having the heaviest wall thickness among the types of copper piping. This thicker wall allows Type K to withstand higher pressures and makes it more durable for use in applications where it may be subjected to external stresses or where freeze protection is essential. Its robust construction is ideal for underground installations and in systems where longevity and durability are crucial.

In contrast, Type M has a thinner wall, making it suitable for lighter residential work. Type L has a medium wall thickness, which is often used for water supply lines and other plumbing applications. Type A is not a standard classification in copper piping, further solidifying the choice of Type K as the correct answer for the heaviest wall thickness. Understanding these distinctions helps in selecting the appropriate type of copper pipe for specific applications based on required strength and pressure ratings.