Griff in Fairbanks wrote:
...Presumably, use paste-type Teflon pipe thread sealant -- sparingly -- instead and only on external threads. (Use on external thread will push excess sealant outside the fitting instead of into the propane system.)...
NO NO NO! Never use Teflon on propane systems. Propane will eat the Teflon away; at best, you'll have a leak; at worst, you'll blow up. There is a special tape made specifically for propane, gasoline, kerosene, benzene, etc... that will not deteriorate.
Attached is a picture of the tape container. You can purchase it at any of the home box stores.
