My son just had a copper water pipe freeze and break. IT's cold up here. where's OUR global warming. IT was in a spot where it would be difficult to solder the new fittings so he used the shark bit fittings. the only drawback he said was they cost about 10 times a much as regular fittings. We plumbed my shop and used about 200 ft of 3/4 copper we salvaged out of a commercial remodel job. the main thing is to slope the pipe runs down hill with drains at the ends of the run. Do the air drop take outs by using an inverted U. go up, over, then down to your outlet fitting so any moistire will drain out the pipe and not collect at the outlets. We worked on a school lab a while back and they spec'd silver soldered joints and the plumbers had to be certified.