I've got a leak where the #4 line screw into the HH. I've checked the head for cracks and none. It slowly seeps out from the threads of the line. I've replaced the line and that slowed it down but it will not seal completely. I tried rotating the line a little, and that didn't work. Any ideas, tricks or suggestions? I replaced the line with one for TNJMurray, they use a metric nut and probably came from china, but they were the only ones I could find.