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The BMI USA 20104 is an extra heavy black malleable iron pipe union sized for 1/2 inch pipe connections. Malleable iron unions provide a removable, pressure-rated joint between two sections of pipe, allowing technicians to disconnect and reconnect lines without cutting. The extra heavy (XH) wall rating makes this fitting appropriate for higher-pressure service applications. Weighing 0.53 pounds, it carries a black finish typical of gas and industrial piping systems. Licensed plumbers and pipefitters install this type of union on gas lines, steam systems, and industrial fluid piping where a break-apart connection point is needed.
This union is suited for 1/2 inch threaded pipe installations in residential and light commercial settings. Common applications include gas supply piping, hydronic heating systems, and industrial fluid lines where periodic disconnection of a pipe segment is required. The black finish is standard for gas service piping and is compatible with black iron pipe systems commonly run by plumbers and gasfitters.
Designed as an OEM-style replacement or new-installation fitting for 1/2 inch threaded black iron pipe systems in gas, steam, and industrial fluid piping applications.
Installation should be performed by a licensed plumber or gasfitter in accordance with local codes and the International Fuel Gas Code (IFGC) or International Plumbing Code (IPC) as applicable. Shut off the gas or fluid supply and relieve system pressure before disassembling or installing any pipe union. Apply appropriate thread sealant rated for the service type to all threaded joints. Inspect the union seat and nut for damage before reassembly to ensure a leak-free connection.
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