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The ASC Engineered Solutions 390009645 is a grooved reducing coupling designed to connect grooved-end pipe of two different diameters in a single mechanical joint. Part of the Gruvlok 7010-E product line, this fitting transitions an 8-inch grooved pipe to a 6-inch grooved pipe without welding or threading. The body is cast from ductile iron, providing the strength and impact resistance required for demanding piping systems. Licensed plumbers and pipefitters install this coupling in commercial and industrial mechanical rooms where grooved piping methods are preferred for speed and serviceability.
This reducing coupling suits grooved piping systems in HVAC hydronic distribution, fire protection, and industrial process piping. It is appropriate for both new construction and retrofit projects where an inline pipe-size reduction is needed at a grooved mechanical joint. The 8-inch by 6-inch transition makes it well suited for main-to-branch takeoffs or riser connections in larger-tonnage hydronic systems where grooved pipe is the specified joining method.
Designed as an OEM-style grooved mechanical fitting for use with standard grooved-end piping systems accepting 8-inch and 6-inch grooved pipe ends per applicable grooved coupling standards.
Installation is performed by a licensed plumber or pipefitter. Depressurize and drain the piping system completely before removing any existing fittings or cutting into live lines. Verify that pipe ends are properly grooved to the dimensional tolerances required by the coupling manufacturer before seating the gasket and housing. Consult applicable mechanical codes, including local adoptions of the International Plumbing Code, for required support spacing and system pressure ratings.
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