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The ASC ENGINEERED SOLUTIONS 1BXD.NB is a hex head pipe bushing designed to reduce a 1-1/4 inch male NPT thread down to a 1/2 inch female NPT thread. Constructed from cast iron with a galvanized finish, this bushing carries a 125 lb pressure rating and is manufactured domestically. The hex head design provides secure wrench engagement during installation, making it a reliable fitting for threaded pipe systems in plumbing, HVAC, gas distribution, and light industrial applications. Licensed plumbers and pipefitters are the primary installers of this type of fitting.
This bushing is suited for residential and commercial threaded pipe systems where a reduction from 1-1/4 inch to 1/2 inch nominal pipe size is required. The MNPT x FNPT end configuration allows it to thread directly into a female-threaded fitting or pipe while accepting a male-threaded pipe or fitting on the outlet side. The galvanized cast iron construction makes it appropriate for water, gas, and air service lines operating within the fitting's rated pressure limits.
Designed as an OEM-style replacement or new-installation fitting for standard 1-1/4 inch x 1/2 inch NPT threaded pipe systems in plumbing, HVAC, and industrial piping applications.
Installation should be performed by a licensed plumber or pipefitter in accordance with applicable local plumbing codes and IFGC requirements where gas service is involved. Shut off the water, gas, or air supply and depressurize the line completely before threading in the bushing. Apply an appropriate thread sealant or PTFE tape to the male threads before installation. Do not over-tighten cast iron fittings, as the material can crack under excessive force.
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