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The ASC Engineered Solutions 390009546 is a grooved reducing coupling designed to connect pipes of two different diameters within a grooved piping system. Sized at 6 inches by 5 inches, it transitions flow from a larger pipe to a smaller one without requiring welding or threading. Constructed from ductile iron, the coupling delivers the structural strength and impact resistance demanded by commercial and industrial piping installations. At 13.41 pounds, it is a robust mechanical fitting suited for use in HVAC hydronic systems, fire protection, and industrial process piping wherever grooved-end pipe joining is specified.
This grooved reducing coupling is used in systems where piping diameter changes are required along a run. Typical applications include commercial HVAC chilled water and hot water distribution, fire suppression mains, and industrial fluid handling. It is installed by mechanical contractors, pipefitters, and fire protection specialists working with grooved-end pipe systems. The coupling is part of the Gruvlok product line and is intended for use with grooved-end pipe conforming to standard Gruvlok groove specifications.
Designed as an OEM-style replacement or system component for grooved piping installations using 6-inch by 5-inch grooved-end pipe per standard Gruvlok groove specifications.
Installation should be performed by a licensed pipefitter or mechanical contractor familiar with grooved piping systems. Depressurize and drain the affected pipe section before removing any existing fittings or couplings. Verify that pipe ends are properly grooved to the required specifications before seating the coupling. Follow applicable codes including NFPA 13 for fire protection systems and local mechanical codes for HVAC hydronic applications.
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