Bob, my UP-6's have never failed or leaked using up to 100 PSI on them. They always release quickly and completely due to the spring loading. I have never had to grease the O-rings. UP suggest lubricating every 3 years with Dow Corning #55 grease which he sells.

Although I have not had any problems with my SS in my Bandit, as long as I keep it clean and greased, I really like the UP-6 and Graupner Electronics better---they are set and forget.

Tom