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The ASC ENGINEERED SOLUTIONS 318909124 is a black cast iron hex bushing designed to reduce pipe connections from a 5-inch female fitting down to a 3-inch male fitting. Cast iron construction with a black coating makes this bushing suitable for drain, waste, and vent (DWV) systems as well as other low-pressure piping applications where durability and corrosion resistance are priorities. The hex profile allows for standard wrench engagement during installation. At 5.02 pounds, this is a heavy-duty fitting intended for professional plumbing and mechanical system work.
This hex bushing is used in residential and commercial plumbing systems where a pipe size reduction is required at a threaded joint. Typical applications include connecting a larger-diameter threaded pipe or fitting to a smaller-diameter run. Plumbers and pipefitters install this type of fitting in above-ground drain lines, mechanical room piping, and industrial pipe assemblies where cast iron is the specified material.
Designed as an OEM-style replacement or new-installation fitting for threaded cast iron piping systems requiring a 5-inch to 3-inch bushing reduction.
Installation should be performed by a licensed plumber or qualified pipefitter in accordance with applicable local plumbing codes and IPC guidelines. Shut off and depressurize the piping system before removing or installing any threaded fittings. Use a pipe wrench on the hex profile and apply appropriate thread sealant or PTFE tape to all threaded connections. Do not overtighten cast iron fittings, as the material is rigid and not tolerant of stress cracking from excessive torque.
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