[CT Jack]

The thread for the gav is 1/8-27 NPT. If someone has chased this thread with a different tap size (straight thread) this could be your leaking problem. If this is the case you might try an old plumbers remedy. Remove a fine strand of cotton from a piece of cotton string. It should be cotton not synthetic type string. Wrap the thread with the string using a couple of passes and apply paint for diesel & gas fuels to thread. The theory behind this is when the fuel contacts the string it will expand or swell and prevent leaking.