in plumbing what are three finishes applied to copper pipe?
In plumbing, finishes are not applied to copper pipe. There is no reason to apply anything.
do you by chance mean fittings?---If so the three most common would be flare, compression and soldered. Like the others said, without more info. it's hard to answer your question.
Mark is correct. There are no *finishes* applied to copper pipe. Perhaps you meant to ask what three types of copper pipe are available? Problem with that is that there are six types, so without you explaining further as to what you wish to know, Marks reply stands as correct. Al
