Description

The IMPERIAL MFG GROUP USA INC GV0787 is a 28-gauge galvanized steel taper reducer/increaser designed for round duct transitions in residential and light commercial HVAC systems. It connects a 7-inch duct to a 6-inch duct without a crimped end, allowing airflow to transition smoothly between different duct diameters. The no-crimp design accommodates either a reducing or increasing application depending on installation orientation. At 6.85 pounds per unit, it is a solid, corrosion-resistant fitting suited for supply or return air trunk-to-branch transitions. HVAC installers and sheet metal mechanics use this fitting when resizing round ductwork runs.

This fitting is used in forced-air heating and cooling systems where round duct diameters must step down or step up between sections. Typical applications include trunk-to-branch transitions, air handler connections, and inline duct resizing on residential or light commercial systems. The galvanized steel construction makes it appropriate for both conditioned-space and unconditioned-space duct runs such as attics, crawlspaces, and mechanical rooms. It is sold in packages of 12 units, making it practical for contractors stocking fittings for multiple jobs.

Key Features

28-gauge galvanized steel construction for corrosion resistance and structural rigidity
No-crimp end design allows use as either a reducer or increaser depending on orientation
Tapered profile promotes smooth airflow transition between duct sizes
7-inch to 6-inch diameter transition fits common residential round duct sizing
Sold in a 12-unit package for contractor convenience

Compatibility

Designed as an OEM-style replacement and new-installation fitting for standard round galvanized ductwork systems using 7-inch and 6-inch diameter duct connections.

Installation Notes

Installation should be performed by a licensed HVAC technician or qualified sheet metal mechanic. Shut down the air handling system and de-energize the unit before cutting into or modifying any duct section. Secure the fitting with sheet metal screws and seal all joints with UL 181-rated duct mastic or foil tape per applicable mechanical codes. Do not use standard cloth duct tape as a permanent sealant.