Imperial Mfg Group Usa Inc GV1420 Taper Increaser 4x6 24GA

Product Description

The IMPERIAL MFG GROUP USA INC GV1420 is a 24-gauge galvanized steel taper increaser designed to transition round ductwork from a 4-inch diameter to a 6-inch diameter. The large end is factory-crimped for straightforward slip-fit connection into standard duct sections. This fitting is a standard component in sheet metal duct systems and is typically installed by HVAC technicians during new construction, system modification, or duct repair. The galvanized steel construction resists corrosion in both supply and return air applications, making it a reliable choice for residential and light commercial forced-air systems.

This taper increaser is used where a duct run needs to step up from a 4-inch trunk or branch to a 6-inch section, common in supply-side layouts where airflow must be distributed across larger downstream duct runs. The crimped large end allows the fitting to slide directly into an uncrimped duct collar or fitting without additional field modification. It ships in a package quantity of 12 units, suited for contractors stocking multiple fittings on a job site or for wholesale distribution.

Key Features

• Transitions round duct from 4 inches to 6 inches in a single fitting
• Constructed from 24-gauge galvanized steel for corrosion resistance
• Large end factory-crimped for direct slip-fit installation
• Sold in package quantities of 12 units
• Taper design maintains smooth airflow transition between duct sizes

Compatibility

Designed as an OEM-style replacement and standard fitting for residential and light commercial round galvanized duct systems requiring a 4-inch to 6-inch diameter transition.

Installation Notes

Installation is performed by licensed HVAC technicians or qualified sheet metal mechanics. Power down the air handling unit before making any duct modifications. The crimped large end inserts into the receiving duct collar and should be secured with sheet metal screws and sealed with listed duct tape or mastic sealant per local mechanical code requirements. Do not force or distort the fitting during installation, as deformation can restrict airflow and compromise the seal.