Can any one tell me what the numerous brass fittings are on the AC line that connects from the accumulator/drier to the evaporator under the dash, what is the function of this. These fittings/parts are now obsolete. I wonder if I can do away with them and just make a new AC line that omits them? I think it is a multi (2) valve(s) for servicing the Accumulator with out losing Freon from the evaporator. Any one run across this. My hose has a leak, but I cant replace the hose with out the parts that are no longer available..