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L G[_27_]

Boating All Out wrote:
In ,
says...

On Tue, 01 Mar 2011 19:59:01 -0500, L wrote:

Google results show differing opinions. Has anyone used Teflon tape
without success on a fuel line thread?

TIA,
Larry

FIRST and FOREMOST.... teflon ONLY works on TAPERED threads. If it
isn't a tapered thread.... forget the teflon (or any other sealant..
fix what is wrong).

Right. Most gasoline fittings are flared.
Teflon tape is for NPT fittings.

There are different formulations of "teflon" for different
applications. For fuel, a "non-white" tape is probably called for.
Don't use the wrong kind. Not all tapes are created equal.

Right.

Don't put ANY tape on the first 1-2 threads.

Right. And it easier to avoid the first threads with tape than it is
with dope. The argument about using not using tape because it can enter
the line is bogus. Improperly applied dope does the same.

There are semi-liquid thread sealants that are better than the tape.
Globs of pipe dope don't seal better; don't put pipe dope on the first
1-2 threads.

Right. But unless NPT, gasoline fittings will be flared or o-ring.
Neither needs tape or dope.

The fittings I replaced were not flared and the larger, replacement
fittings are also not flared.