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The BMI USA 4445 is a lead-free brass threaded nipple designed for use in potable water, plumbing distribution, and general fluid-handling systems. Machined from brass with a red finish, this close-pattern nipple measures 1/2 inch in diameter and 4-1/2 inches in length, making it a standard short-run connector between threaded fittings, valves, and fixtures. Its lead-free construction meets requirements for drinking water applications where material compliance is mandatory. Licensed plumbers and pipefitters install this type of nipple as part of supply risers, manifold assemblies, and fixture rough-in work.
This nipple is suited for residential and light commercial plumbing installations where a 1/2 inch NPT threaded connection is required. Typical applications include water supply lines, boiler piping, irrigation manifolds, and HVAC hydronic systems. The 4-1/2 inch body length provides adequate reach for standard offset connections between valves, tees, and couplings in both new construction and retrofit service work.
Designed as an OEM-style replacement and standard-fit brass nipple for 1/2 inch NPT threaded plumbing systems in residential and light commercial applications.
Installation is performed by a licensed plumber. Shut off the water supply and relieve line pressure before removing or installing any threaded fitting. Apply thread sealant tape or paste rated for the intended service to all male threads before assembly. Hand-tighten first, then wrench-tighten per standard practice — avoid over-torquing brass fittings to prevent thread damage or cracking.
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