Imperial Mfg Group Usa Inc GV0779-A Taper Reducer 4x3 30GA

Product Description

The IMPERIAL MFG GROUP USA INC GV0779-A is a galvanized steel taper reducer/increaser designed for round duct transitions in residential and light commercial HVAC systems. This fitting steps a 4-inch duct down to a 3-inch connection, or serves as an increaser when installed in the reverse direction. Constructed from 30-gauge galvanized steel, it delivers a clean, no-crimp end that slides directly into standard round duct and fittings. Sheet metal mechanics and HVAC installers reach for this type of fitting when transitioning between trunk lines and branch runs or when adapting to equipment collars of differing diameters.

This reducer/increaser is suited for low-pressure supply and return air duct systems in forced-air heating and cooling applications. The tapered body maintains smooth airflow through the transition, reducing turbulence at the diameter change. It is packaged in quantities of 10 per unit, making it a practical choice for contractors stocking a job site or sheet metal shop handling multiple duct runs of mixed sizing.

Key Features

• 4-inch to 3-inch taper transition for round duct systems
• 30-gauge galvanized steel construction for corrosion resistance
• No-crimp end for clean insertion into duct and fittings
• Reversible design functions as both a reducer and an increaser
• Sold in packs of 10 for job-site or shop stocking efficiency

Compatibility

Designed as an OEM-style replacement and standard fitment for 4-inch to 3-inch round duct transitions in residential and light commercial forced-air HVAC systems.

Installation Notes

Installation is performed by qualified sheet metal mechanics or HVAC technicians. Power down the air handling system before working on any duct section. Secure the fitting with sheet metal screws and seal all joints with listed duct sealant or foil tape per applicable mechanical codes. Do not use this fitting in applications exceeding the pressure or gauge rating of the surrounding duct system.