Quote Originally Posted by Mechanic688 View Post
The two lines have to be bonded together somehow (usually brazed) shouldn't be hard to see if you look at it.
I must be talking about about something different then everyone else. What i was refering to was a line that appears to be copper but is just copper coated steel. You can scratch it and expose the steel. I thought i hit the jackpot one day when i got a fridge that i thought had a copper "radiator" but it turned out to just be this copper coated stuff.