I think we saw the same u-tube video. I'm doing my piping with some 3/4" stuff I already had. Only had to buy the AN to pipe fittings on the cooler and the water trap. Using Sil-phos brazing rod for the joints. Way more work than it needs to be but I like making use of what I have. All the new lines will be 3/4" too because I got it for $5 a stick. $30 for 60'.