While not quite as thick as Type K, with a wall thickness of .045 inches for a ¾-inch diameter … 展开

Type M has a wall thickness of .032 inches for a ¾-inch diameter pipe, making it a thinner wall than both Type K and Type L copper. While this might seem like a point for the “cons” list… 展开

The letters DWV stand for drain, waste, and vent—a helpful reminder that DWV pipe is approved for use only in drain and vent lines. As the only copper pipe type not used in water systems… 展开