The average wall thickness of a copper water pipe used above ground in residential buildings is 0.076 inches. However, the wall thickness of a copper water pipe varies considerably based on the type of function performed by a water pipe and the area where it is installed.
The wall thickness of a water pipe is primarily determined by the pipe's diameter. Generally, a pipe with a small overall diameter has thinner walls, while a pipe with a greater diameter has thicker walls. Also, a pipe performing light duty inside a well-insulated residential home requires thinner walls than a water pipe performing heavy duty outdoors.