The line tap is a great idea but I think this line is too small for that. Going to Lowes tomorrow. Let me make sure I have this right. From what I have been able to find, for silver solder I need map gas, not propane? No flux required? I have soldered copper pipe before but only on water systems.
Thanks for all the responses. This is kind of odd because 2 days ago I ordered a new a/c to add a third to my MH. 2 just won't keep me cool in a few places I have to go. I have about a month before going on my hottest annual trip. Got some work to do.