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The ASC Engineered Solutions 390095305 is a standard grooved galvanized coupling designed for use in grooved piping systems. This ductile iron fitting connects grooved-end pipe sections by engaging the groove on each pipe end and drawing them together under a gasket seal, creating a rigid mechanical joint. At 4 inches, it suits medium-to-large diameter piping runs common in commercial HVAC, fire protection, and industrial plumbing applications. Licensed plumbers and pipefitters install this coupling as a fast, reliable alternative to welded or flanged connections. The galvanized finish provides corrosion resistance in wet or damp environments, and the ductile iron construction delivers the strength needed for pressurized systems.
This coupling is used in grooved mechanical piping systems across commercial and industrial settings, including hydronic heating and cooling distribution, chilled water mains, condenser water piping, and fire suppression mains. It accommodates 4-inch grooved-end pipe and is suited for retrofit and new construction work where fast assembly and field serviceability are priorities. Plumbers, pipefitters, and mechanical contractors working on commercial HVAC or wet-pipe fire systems will encounter this type of fitting regularly.
Designed as an OEM-style replacement and standard-duty grooved coupling for 4-inch grooved-end pipe in mechanical piping systems.
Installation should be performed by a licensed plumber or pipefitter following applicable IPC and IFGC mechanical codes. Depressurize and drain the piping system fully before removing or replacing any coupling. Inspect the gasket and pipe groove condition before assembly, and torque housing bolts evenly to manufacturer specification using a calibrated torque wrench. Do not use this coupling on pipe ends that have not been properly roll-grooved or cut-grooved to the correct groove profile.
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