I was just setting up my system when I notice what seemed to be some discoloration inside the valve. I disassembled it normally, and noticed more discoloration in the stem area of the ball. this led to a COMPLETE disassembly of the unit, only to discover some serious nastiness in the stem. I also noticed that one of the small stem gaskets was pretty worn. Luckily, I had a spare. Ive sent a note to Derrin about the gaskets required for a complete rebuild of the unit.
Though you might like to know.
Though you might like to know.