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The ASC Engineered Solutions 1XD.NB is a hex head pipe bushing used to reduce a 1-inch female threaded port down to a 1/2-inch male threaded connection. It features a male NPT (MNPT) outer thread and a female NPT (FNPT) inner thread, allowing technicians to transition between two common pipe sizes within a single fitting. Rated for 150 lb service, this bushing is constructed from malleable iron with a galvanized finish for corrosion resistance. It is a domestically produced fitting suited for plumbing, HVAC piping, gas distribution, and general industrial pipe systems where a compact threaded reducer is required.
This hex head bushing is commonly installed in residential and light commercial piping systems. The hex head profile allows a wrench to seat properly for tightening, making it practical in tight or congested pipe runs. Typical applications include gas line assemblies, water supply piping, steam systems rated within the 150 lb pressure class, and hydronic heating piping. Plumbers, pipefitters, and HVAC technicians working with NPT-threaded iron pipe systems will encounter this fitting as a standard reducing component at branch connections, valves, or equipment inlets.
Designed as an OEM-style replacement or new-installation fitting for 150 lb class malleable iron NPT pipe systems requiring a 1-inch to 1/2-inch threaded reduction.
Installation is performed by licensed plumbers or pipefitters following applicable IPC or IFGC code requirements for the service type. Apply an approved thread sealant or PTFE tape to the male threads before assembly. Shut off and depressurize the pipe system fully before removing or installing any threaded fittings. Do not over-torque malleable iron fittings, as the material can crack under excessive force.
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