Hey, Is there a way to know what size AN fittings I need to order without guessing? Im new to the AN world and was told that 6 AN was 5/16, 8 AN is 3/8, and 10 AN is 1/2.. but thats just not seeming to work out right. I have to order a bunch of fittings to run my waterline and guessing just isnt going to cut it! Thanks