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The ASC Engineered Solutions 1BX1.BMC is a malleable iron black pipe reducing coupling rated at 150 lb, designed to connect a 1-1/4 inch nominal pipe to a 1 inch nominal pipe using female NPT (FNPT) threads on both ends. This fitting is a standard threaded reducer used in gas, air, and low-pressure fluid piping systems where pipe size must be stepped down at a junction. The black finish indicates it is not galvanized, making it a common choice for gas distribution lines. Plumbers and pipefitters install this fitting in residential and light commercial applications where code-compliant, pressure-rated iron fittings are required.
This reducing coupling is suited for residential and commercial piping installations involving natural gas, propane, compressed air, and water service lines where a transition from 1-1/4 inch to 1 inch pipe is needed. The 150 lb pressure class rating makes it appropriate for standard low-pressure service conditions typical in building mechanical systems. It is a domestically produced fitting, which satisfies Buy American and domestic content requirements on applicable projects.
Designed as an OEM-style threaded replacement fitting compatible with standard 150 lb malleable iron pipe systems using NPT-threaded connections in 1-1/4 inch and 1 inch nominal pipe sizes.
Installation should be performed by a licensed plumber or pipefitter in accordance with applicable codes, including the International Fuel Gas Code (IFGC) and International Plumbing Code (IPC). Shut off and depressurize the piping system completely before removing any existing fittings or making new connections. Apply an approved thread sealant or PTFE tape to male threads before assembly, and tighten with a pipe wrench to achieve a leak-free joint. Do not over-tighten, as malleable iron threads can crack under excessive force.
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