About at my wit's end with this line. It is main line coming off the pump and goes to remotes. NH tl100a. PO replaced it 4 yrs ago when original line started leaking. I developed a leak at the junction Sunday. I replaced the oring and then Monday it started again . closer inspection shows it has a hairline crack on line. I removed it and remembered the original was in the cabinet at the barn tried to find when it leaked at 4 yrs ago and couldn't find it. But the flange was brazed so I suspect he actually had it repaired, ( he was most likely drunk so he can't remember) I installed it and ran it 4 hrs baling yesterday and it started spewing again. After a little research there is a seal that goes in along with Oring . and of course dealer does not have it in stock. I replaced oring today again and was able to get finished.