Which of the following types of copper pipe are common to plumbing work?

And the "following types" would be what, exactly?

I don't see anything "following"? Maybe it's me. I did have a long day... lol

I would say all copper pipe is common in plumbing, depending on what the application is.

"L" type copper pipe is used in most of our construction. There are three types of copper pipe. Type "M" which is thin wall, Type "L" which is medium wall and type "K" which is heavy wall. Cheers, Tom