pipe dope versus teflon tape?

[bill allemann]

I've been trying to put together some black pipe and have been having poor luck with pipe dope. I've seen a number of recommendations on this ng for pipe dope over teflon. I forget the brand name of the pipe dope, but it's supposedly the big seller at a real plumbing supply house. I've tried some joints with low torque, medium, and really tight. I still get some leakers. I can then take the same parts, put tape on them, and barely run them past hand tight, and they test good. Is there any longer term issues with teflon on gas lines? thanks, Bill

[hallerb]

teflon is fine on gas lines, just dont leave pieces of it lose on the inside of the line, that could say clog a burner downstream.

best results according to a plumber friend is tape then dope, the combo nearly never leaks

[Toller]

Not with the yellow.

[Sacramento Dave]

1: Rectorseal (dope) 2:Teflon 4 to 6 wraps clockwise 3: rectotseal again. I never heard of any long term issues with Teflon tape, but was on a school job they would not let us use Teflon tape. I'm sure the reasoning was concerns on pieces of Teflon getting in system. Just hold the tape back one thread. Another dope is Oatey "Great White", pipe joint compound with Teflon. I like it better than rectorseal it is suitable for gas.