My Benjamin Marauder 25 is leaking air between the gauge and the adapter that threads into the pressure tank. The oring between the adapter and the tank is fine. The pressure gauge threads into the adapter with straight threads. There was a black material in the threads, maybe some kind if sealant. I tried teaflon tape to no avail, what do need to put on these straight threads to seal this, and thanks in advance.
Dan
Dan
