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The ASC ENGINEERED SOLUTIONS 318911484 is a black cast iron flush bushing designed to reduce pipe thread sizes within a fitting or threaded port. This type of bushing sits flush with the face of the fitting rather than extending beyond it, making it well suited for tight installations where clearance is limited. At 1-1/4 inches by 1 inch, it steps down from a larger female thread to a smaller male thread in a single compact fitting. Plumbers and pipefitters install this component as a standard part of threaded piping assemblies. It weighs 0.19 pounds and carries a black coating for corrosion resistance in typical pipe system environments.
This flush bushing is used in threaded black iron pipe systems common to residential and commercial gas distribution, fire suppression, and general plumbing applications. The 1-1/4 inch to 1 inch reduction is a frequently encountered size transition when connecting branch lines, valves, or equipment with smaller inlet ports to larger pipe runs. It is installed wherever a low-profile threaded reducer is preferred over a hex bushing or reducing coupling. Domestic manufacture supports consistent thread quality and dimensional accuracy.
Designed as an OEM-style replacement or new-installation component for standard threaded black iron pipe systems using NPT connections in 1-1/4 inch and 1 inch sizes.
A licensed plumber or pipefitter should install this bushing in gas or fire suppression systems per applicable code requirements such as IFGC or NFPA 13. Shut off the gas supply or system pressure and depressurize the line before threading or unthreading any fitting. Apply an appropriate thread sealant or pipe thread compound rated for the service media to the male threads before assembly. Do not over-tighten; hand-tighten first and then use a pipe wrench for the final turns to avoid cracking the casting.
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