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The B K/MUELLER INDS(IMPORT) 588-055HC is a black steel pipe nipple measuring 2 inches in diameter by 5.5 inches in length. Pipe nipples are short threaded pipe sections used to connect fittings, valves, and equipment in piping systems. This nipple is finished in black, indicating a standard black iron construction suitable for gas, air, and general industrial piping applications. Licensed plumbers, pipefitters, and gas service technicians commonly install this type of fitting during new construction and retrofit work.
This black pipe nipple is used in residential and light commercial gas distribution lines, compressed air systems, and industrial fluid piping. The 2-inch diameter and 5.5-inch body length make it appropriate for branch connections and close-coupled equipment hookups where a short extension is needed between threaded fittings or valves. It is sold in a package quantity of 5 pieces per unit of measure.
Designed as a standard-thread replacement or new-install fitting compatible with 2-inch NPT threaded fittings, valves, and pipe couplings in black iron piping systems.
Installation of black pipe nipples in gas service should be performed by a licensed plumber or pipefitter in accordance with applicable local codes and the International Fuel Gas Code (IFGC). Shut off the gas supply and depressurize the line before threading or replacing any fitting. Apply an approved pipe thread sealant or PTFE tape rated for gas service to all threaded joints. Pressure-test the completed assembly before returning the system to service.
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