Originally Posted by kev
No kidding, wow. That is good info to know, thank you. I am assuming that the nut that you are talking about is kinda in the same location as a packing nut would be on a standard water valve?
Correct. It's item 7 in the figure below...
 fwiw, I've been running six 525 SS Perls for almost three years. Out of the box, one of them had a tendency to drip, the others have always been rock solid. I dis-assembled the outlier, cleaned everything, applied just a ghost of a film of keg lube to all of the o-rings, reassembled it, adjusted the bonnet (item 7) so the lever moved smoothly, and it hasn't leaked a drip ever since. If there's an intrinsic problem with the 525 SS now, someone changed something at the factory , imo...