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The ASC Engineered Solutions 810086405 is a black malleable iron reducing coupling designed for joining threaded pipe sections of different diameters in low-pressure piping systems. The fitting connects a 3/4-inch line to a 1/4-inch line using standard male threaded connections on both ends. The black coating provides corrosion resistance suitable for gas distribution, compressed air, and similar applications. Weighing 0.20 pounds, this compact fitting is a standard component in mechanical and plumbing rough-in work. Licensed plumbers, pipefitters, and gas service technicians routinely use malleable iron couplings of this type in commercial and residential installations.
This reducing coupling is suited for residential and light commercial piping installations where a transition between 3/4-inch and 1/4-inch threaded pipe is required. Typical applications include black iron gas piping, compressed air distribution lines, and other low-pressure threaded systems. The malleable iron construction handles the stresses of assembly and field adjustment better than cast iron, making it a preferred choice in systems where vibration or minor flex may occur during service.
Designed as an OEM-style replacement or new-installation fitting for standard NPT threaded black iron piping systems requiring a 3/4-inch to 1/4-inch reducing connection.
Installation should be performed by a licensed plumber or pipefitter in accordance with applicable local codes and IFGC requirements for gas piping or relevant mechanical codes for air systems. Shut off the gas supply or depressurize the air line completely before disassembling or installing any threaded fittings. Apply an approved pipe thread sealant or PTFE tape rated for the service medium to all threaded joints before assembly. Do not overtighten; use a pipe wrench to achieve a firm, leak-free connection without stressing the fitting body.
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