I was at a client's house this spring and last fall he had his plumber move the 3/4" copper supply line over 5 feet on the outside of the house since he finished the basement and wanted the POC to reside in the utility room rather than inside a finished wall. The plumber used two 3/4" shark bite couplings and a piece of Pex in between (it looked real bad). When I saw it I told the client before I turned the water on that over the winter ice must have weighed the pipe down (no brackets!) and it looked like the couplings were going to leak. He said his plumber was good and it should be fine but it wasn't-the mess blew apart as soon as I turned it on. Two brass compression couplings and a 5 foot piece of 3/4" L copper later is was in fact now "fine" to use.