GarySlusser
Crank, no. It deforms the ferrule and that causes leaks. You tighten finger tight and one or two full turns and check for leaks. If it leaks, depressurize and go another 1/4 turn to half a turn and check again. Repeat as needed. Nothing on the ferrule or nut. Perferably an insert in the end of the tubing.
Gary
Quality Water Associates
