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Originally Posted by Gulp35
Just a Q that poped into my head, how does the tape get into the system If you are placing it on the threads? If It was getting in the system couldn't you just put the tape further up the threads?
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It gets cut by the threads as you turn the fitting into the female threads. If you put it further up, it doesn't do its PRIMARY job, which is lubricating the threads, not sealing them. To seal, the threads are tapered in diameter, so that they are deformed into each other. That is why pipe threads are tapered: to cause a tighter fit as you turn further into the fitting.