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The BMI USA 20105 is a 3/4 inch extra heavy black malleable iron pipe union designed for use in threaded piping systems where a secure, removable connection is required. Malleable iron construction gives this union the strength to handle demanding applications in plumbing, gas, and steam distribution lines. The black finish indicates a non-galvanized iron body suited for dry or gas service environments. Licensed plumbers and pipefitters install this fitting where a section of threaded pipe must be disconnected and reconnected without disturbing the surrounding run.
This union is rated for extra heavy service, making it appropriate for commercial and industrial piping installations in addition to residential mechanical systems. It is commonly installed on gas supply lines, boiler connections, and general black iron pipe runs where a breakdown union is required for serviceability. The 3/4 inch thread size fits standard 3/4 inch black iron pipe.
Designed as an OEM-style replacement or direct addition fitting for 3/4 inch threaded black iron piping systems in residential and commercial mechanical applications.
Installation is performed by a licensed plumber or pipefitter following applicable codes such as the International Plumbing Code or International Fuel Gas Code. Shut off gas or water supply and relieve system pressure before removing or installing any union fitting. Apply appropriate thread sealant or PTFE tape to all male threads before assembly. Do not overtighten the union nut, as excess force can damage the iron seating surfaces.
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