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The BMI USA 20103 is a 3/8-inch extra heavy (XH) black malleable iron pipe union designed for use in threaded pipe systems requiring a reliable, demountable connection. Constructed from extra heavy malleable iron with a black finish, this union allows sections of pipe to be joined and separated without disturbing the rest of the run. It is suited for gas, steam, and general-purpose piping applications where a robust mechanical connection is required. Licensed plumbers and pipefitters typically install this fitting as part of service valves, equipment connections, or anywhere future serviceability is a priority.
This union is intended for residential and light commercial piping installations. Its extra heavy wall construction makes it appropriate for higher-pressure or higher-stress service environments compared to standard-weight fittings. The 3/8-inch thread size suits smaller-diameter branch lines and equipment connections commonly found in gas appliance hookups, heating systems, and general mechanical piping.
Designed as an OEM-style replacement or direct-use fitting for 3/8-inch NPT threaded pipe systems in residential and commercial mechanical piping applications.
Installation should be performed by a licensed plumber or pipefitter in accordance with applicable local codes and standards such as the International Plumbing Code (IPC) or International Fuel Gas Code (IFGC). Shut off all gas or fluid supply and relieve system pressure before disassembling or installing any threaded union. Apply appropriate thread sealant or tape rated for the intended service medium. Hand-tighten the union nut before using a wrench to achieve a leak-free, secure connection without over-stressing the fitting.
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