Teflon tape must always be applied in a clockwise direction around the male threads of a pipe fitting. Holding the pipe facing toward you and wrapping clockwise ensures that the tape stays securely in place and molds tightly into the thread grooves as you screw the fitting into the female connector. If you wrap the tape counterclockwise, the rotational friction of tightening the joint will catch the loose tail of the tape, causing it to unravel, bunch up, and shred entirely. Adhering strictly to this clockwise wrapping technique is a fundamental rule for ensuring a clean, uniform, and completely leak-free plumbing assembly.
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