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The ASC Engineered Solutions 8700140851 is a 1-inch close nipple made from Schedule 40 welded steel with a black iron coating. A close nipple has threads running nearly the full length of the fitting with minimal or no unthreaded center section, making it the right choice when two fittings need to be joined with the shortest possible pipe segment. The black coating provides baseline corrosion resistance for dry or low-moisture environments. Standard NPT threads ensure a reliable, leak-resistant connection when assembled with compatible fittings and appropriate thread sealant. Licensed plumbers and pipefitters install this fitting in gas, steam, air, and water distribution systems.
This close nipple is used in residential and light commercial piping applications where a 1-inch threaded connection is required with minimal standoff between fittings. Typical installations include natural gas supply lines, steam heating systems, compressed air distribution, and black iron water supply runs. The Schedule 40 wall thickness meets standard pressure requirements for these service types. It is sold individually and is a common stock item for plumbers, pipefitters, and mechanical contractors working on both new construction and service replacement projects.
Designed as an OEM-style replacement or new-installation fitting for 1-inch NPT Schedule 40 black iron threaded piping systems.
Installation should be performed by a licensed plumber or pipefitter in accordance with applicable local mechanical and plumbing codes. Shut off and depressurize the line completely before making or breaking any threaded connection. Apply an appropriate thread sealant or PTFE tape to male threads before assembly and tighten to a snug, leak-free fit using pipe wrenches. Do not overtighten, as this can crack fittings or distort threads.
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