as long as we are talking about installing a copper herms coil and Bobby is in the room, id like to piggyback a question. Bobby, I got a great deal on some stainless unions. I am soldering in stainless couplers and plan to use the unions to connect the herms coil. Should make it easy to remove for cleaning purposes. Any problems with my plan on the unions, i ended up getting them much cheaper than the compressions would have been. Oh and I plan on cutting my coil and using a 90 soldered with another straight piece out of the 90 to have a nice straight shot into the union.