The copper tube should be Minimize sq. making use of an proper tubing cutter. After chopping, the tube need to be reamed to the total inside of diameter leaving no within burr (Determine 9.three). Tube that is definitely outside of round prior to flaring should be resized back to spherical. http://deanxhpyf.pointblog.net/The-best-Side-of-flare-fitting-27109264