I replaced the propane regulator on my travel trailer and they told me to be sure to not use white teflon tape. I guess there is yellow tape made for gas connections, but they said they didn't use it either. They use the yellow (for gas connections) stuff in a squeeze tube, because they have seen tape pieces from connections break off and clog the orfices in gas appliances on RVs.
And they are correct. If you arn't careful when you apply the teflon tape, you will cause pieces to plug up anything downstream. But it is easy to do it correctly.
