Type M copper water tube indicates what type of wall thickness?

Type M copper water tube is characterized by its light wall thickness, which is suitable for various plumbing applications, particularly in residential settings where the pressures and stresses are lower compared to more demanding environments. The designation of copper tubes often includes letters that indicate the wall thickness, with Type M being the thinnest among the three common types (M, L, and K). This light wall allows for easier handling and less material cost, making it a preferred choice for many homeowners and contractors when working on water supply lines, heating systems, and similar applications where extreme pressures are not expected.

In contrast, types L and K denote medium and heavy wall thicknesses, respectively, used in applications requiring higher strength or durability. Thus, recognizing that Type M's light wall thickness offers flexibility and cost-effectiveness is essential when determining the appropriate tubing for specific plumbing needs.