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The B K/MUELLER INDS(IMPORT) 588-001HN is a close-pattern black pipe nipple sized at 2 inches. A pipe nipple is a short length of threaded pipe used to connect two fittings, valves, or other pipe sections. The close pattern means the nipple is threaded along its full length with no unthreaded center section, making it useful where space between fittings is tight. This type of fitting is commonly installed by licensed plumbers and pipefitters working on gas distribution, water supply, or general black iron piping systems. Each package contains 5 nipples.
Close-pattern black pipe nipples are used in residential and light commercial applications where a direct connection between two threaded fittings is required without any gap. Common installations include gas line assemblies, boiler piping, compressed air lines, and steam systems. The black iron finish makes this nipple appropriate for gas service and non-potable water systems where galvanized fittings are not required or preferred.
Designed as an OEM-style replacement or standard fitment for 2-inch threaded black iron piping systems in residential and light commercial plumbing and gas applications.
Installation should be performed by a licensed plumber or pipefitter in accordance with applicable local codes and the International Fuel Gas Code (IFGC) or International Plumbing Code (IPC) where gas or water service is involved. Shut off and depressurize the line fully before removing or installing any threaded fittings. Apply an appropriate thread sealant or pipe thread compound rated for the intended service medium before making up the joint. Do not over-tighten threaded connections on black iron fittings, as this can crack adjacent cast fittings.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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