Your post says 5/8 not 1/2. I have a cf with a 5/8 hose and 3/8 copper tube. Mine is 25 feet and works like a champ. I actually built a second as I had extra hose and now use one with the tap water and then a post chill sump pumpin a cooler of ice as the ground water is around 85-90 degrees in northern Va.
"Drive through it Cole. I know you can..I know it in my heart."