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NPT to 1/4 Inch Air Valve Stem Freedthrough, Used to Add Positive Air Pressure to Test Vacuum Lines
These adapters are male 1/4 NPT to 1/4 inch air valve stem feedthrough. They are commonly used for temporarily adding positive air pressure to test vacuum lines. The 1/4 inch air valve stem is standard and connects to most air compressor hose fittings and lines.
WARNING: Brass alloys contain Zinc. Zinc will outgas from brass under certain combinations of elevated temperature and high-vacuum. System damage may occur if these conditions are present.
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