Replace the gas valve, use Teflon tape during the connections.

Daniel Prince wrote in message
...
We have a small gas leak where the flexible connector connects to the
gas valve. We have tried two different flexible connectors and the leak
is there with both of them. Is there anything we can do other than
replacing the gas valve? If we have to replace the gas valve, is there
any way to soften the old pipe dope on the threads?