What is the name of the hose that runs from the a/c unit to the rear a/c in a Dodge Ram conversion van?

Question

We had our a/c quit on us this week, and a mechanic told us that the problem was a hose that ran from the front a/c to the rear a/c. My husband was the one who took it in to the shop, and he didn't get the name of the hose we need to replace, and he was told that it was a repair we'd have to get done at a dealer. I'm hoping to locate the part and minimize some of the expense of the repair. Does anyone know what that hose is called and where I might find it? Thanks!

Answer 1

what year is it?