Months ago, there was a thread talking about the new pups and how the company had changed from cut off valves to gladhands, on the airlines. I didn't like it then and after last night, I hate it. At the meet site, I was doing my pretrip walkaround, with the red button pushed in to feed air to the system. I popped the red gladhand off , of the rear pup, to make sure that I had air all the way to the back and then resecured the gladhand with no apparent leakage. Right before I left, I made one final walkaround and that's when I heard it and found it. The red line rubber grommet, on the rear pup, the one that resecured with no apparent leak, had blown out and was leaking. I resecured the glad hand and waited. Sure enough, a few minutes later the grommet blew out again. I replaced the grommet and waited but no problems with the new one. I hate those gladhands.