Thread: Teflon tape ok for gas fittings?

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I'm plumbing in my new gas tank and was wondering if teflon tape is ok to use on threaded fitting into gas tank. I figure as long as gas doesn't melt it it should work. Am I right? Or is the a special thread calk, gasket seal, etc, that I should use?

Ive always been told NO TEFLON ! , If they are AN fittings they do not require any thread sealer, or if they are a tapered, or flared fitting they should seal fine also without sealer..

http://www.acehardwareoutlet.com/(2f...aspx?SKU=88227
http://www.rshughes.com/images/produ...yAUlyqcQCA.pdf

techinspector1,

who's that handsome fella in your Avatar?

Originally Posted by 35WINDOW

techinspector1,

who's that handsome fella in your Avatar?

Thanks for that, but I'm fully aware that I'm just another old guy.

No teflon tape anywhere on autos or airplanes---especiallty fuel or brake systems

teflon tape or paste is for water seal.

Thanks Guys, especially tech inspector. Went to Napa and got a small container of permintex no 3 for aviation/ marine/auto. I'm sure I'll find other uses for it too!

I used the Yellow Teflon tape on the gas line of my stock Model T, works great. It states on the packageof the Yellow that it's for Gasoline and natural gas. Cos for one of them small rolls is $7.00 compaired to $.50 for the regular white stuff that will NOT work for gasoline.

Tom F,

Thanks for the heads up on the yellow Teflon tape never knew about it.

CRUISER

try gasoila that is what we used at the boat yard on NPT and like said never on AN

You can use white teflon tape if you are careful to not apply it to the first couple of threads as it will disolve over time. What it really does is reduce friction and allow you to torque up pipe threads so the threads actually do the sealing. I've never had a problem with it personally.

That said, why not use the more compatable yellow tape or any of the large selection of PTFE compound pastes that are gasoline compatable. You should still keep that stuff off the firsy couple of threads as well ............

Kitz

.

I know I'm a bit late on this subject - but here's a long standing solution that I have used. It's called "Rector Seal" (no nasty comments please!). I first saw this stuff nearly 40 years ago as an aircraft mechanic working on C-141 for Uncle Sam. It's a thick paste and has been a standard for high pressure gas (liquid and solid) as well as hydraulics and fuel (JP-4/5). I have used it in all types of threaded lines and never had a leak. Just brush it on and tighten - wipe off the excess and viola.

It's available at Home Depot, Lowes or any plumbing store. Has an indefinite shelf life (I been using the same can for twenty years!)

Regards All,
Glenn

Originally Posted by kitz

You can use white teflon tape if you are careful to not apply it to the first couple of threads as it will disolve over time. What it really does is reduce friction and allow you to torque up pipe threads so the threads actually do the sealing. I've never had a problem with it personally.

That said, why not use the more compatable yellow tape or any of the large selection of PTFE compound pastes that are gasoline compatable. You should still keep that stuff off the firsy couple of threads as well ............

Kitz

.

yes i have used it and it work fine like you said. just not the first couple of threads what you need slip for the pipe to work in

I use Never-Seize on aluminum AN fittings - recommended by the two owners of an old small town speed shop in Central California.

Works fine.

Not recommended to use LocTite's PFTE white sealant on aluminum fittings.
It locks them together so strongly that threads will tear off if the fittings are unscrewed an hour or two after they're put together.
If you did use the stuff, wait 24 hours and it releases easier, but will still rip and damage threads at times.


Glennsexton, how well does the Rector Seal release?

Seems like there's always a fitting or two that gets taken apart on a hot rod.