What is the minimum type of copper water pipe required?

The minimum type of copper water pipe required for plumbing applications is Type M. Type M copper pipe is thinner-walled than Types K and L, making it lighter and easier to handle, which is often suitable for residential plumbing in applications not subject to severe conditions.

Type K, while having the thickest walls, is typically used for underground applications and those requiring extra durability, making it more expensive and less commonly needed than Type M for general use. Type L has a wall thickness that is stronger than Type M but is also more costly and often unnecessary for standard plumbing needs. Type T, while not a standard designation for copper pipes, does not meet the criteria necessary for water systems and is not generally accepted for plumbing use.

Understanding the different types of copper pipes and their appropriate applications is essential. Type M is often sufficient for standard pressure and temperature conditions in water supply plumbing in homes, which is why it is considered the minimum requirement.