Caution:
White (teflon) tape is great for water lines, as the teflon doesn't wet and the tape is a good lubricant for getting the joint tight. Even poor joints won't leak.
For gas lines it is far less effective, and can be very dangerous if a high-pressure source has to pass through a narrow restriction, such as a needle valve. The tape tends to shred, and little particles can jam the needle valve, allowing a pressure buildup, in some systems, that can become explosive.
When I was with Hewlett-Packard Labs, the use of teflon tape was banned company wide, after several unpleasant incidents. Use a goop in a tube, instead.
Wright
01 760 872-3995
805 Valley West Circle
Bishop, CA 93514 USA
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