It is generally not okay and often violates local plumbing codes to use standard white Teflon tape on gas fittings, such as natural gas, propane, or butane lines. Gas lines require specialized yellow gas-rated Teflon tape, which is significantly thicker, heavier, and chemically engineered to withstand volatile gases and prevent fuel leaks over long periods. Standard white tape is much thinner and may degrade when exposed to certain gases and chemical additives over time. Using the correct yellow gas tape ensures maximum safety, compliance with building regulations, and a robust, reliable seal for all residential and commercial fuel supply installations.
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