When it comes to the pipes used in a multifamily structure or home, not all copper pipes are the same. Copper pipes are generally used for supply line and HVAC purposes. Understanding the different types of copper pipes is extremely important when engaging in any kind of pipe replacement.
The type of copper pipe appropriate for any particular job is determined by the fluid pressure on the pipes, conditions and local codes. The three most commonly used classifications of copper pipe are L, K and M.
Type K is the thickest of the three. It is usually used for water distribution and HVAC purposes. It is also the type most used in underground applications.
Type L is typically used for internal plumbing applications. It is available in hard and soft, and is flexible in its use.
Type M is the thinnest of the three, and is typically used in water supply applications.
If you are unsure of which copper pipe type you need for your purposes, you should seek the help of a qualified copper pipe replacement or installation expert.