AN plumbing rocks. 165056 will only (technically) work for the 5/16" feed line. If it ends up working for you on the 1/4" return line, let me know, Ill use that fitting instead of buying a 37 degree flare tool. :up:im going to check 2 marrow becuse when i first tried to put it on the feed line did not seem to fit might need to sand it down after i cut it. the return line seemed a little loose but looked like it would be alright after i fully tightened it. the part im using is # 165056 from http://www.anplumbing.com/shop