Description
The IMPERIAL MFG GROUP USA INC GV1419 is a 24-gauge galvanized steel taper increaser designed to transition round ductwork from a 4-inch diameter to a 5-inch diameter. The large end is factory-crimped for straightforward insertion into mating duct sections without additional field modification. This fitting is used in low-pressure residential and light commercial HVAC duct systems where airflow must be stepped up between trunk lines and branch runs. HVAC sheet metal installers and mechanical contractors handle this type of fitting during new installation and retrofit work.
This taper increaser is suited for round galvanized duct systems in forced-air heating and cooling applications. The 24-gauge construction provides adequate rigidity for standard residential supply and return duct configurations. Sold in a package of 10 units, the GV1419 is a practical stocking item for sheet metal shops and HVAC wholesalers supplying repetitive residential duct work.
Key Features
- Transitions 4-inch round duct to 5-inch round duct in a single fitting
- 24-gauge galvanized steel construction for corrosion resistance in standard duct environments
- Large end factory-crimped for direct insertion into downstream duct sections
- Tapered profile maintains smooth airflow transition and minimizes turbulence
- Packaged in quantities of 10 for contractor and shop use
Compatibility
Designed as an OEM-style replacement and new-construction fitting for standard 4-inch to 5-inch round galvanized duct systems in residential and light commercial forced-air HVAC installations.
Installation Notes
Installation is performed by licensed HVAC technicians or sheet metal mechanics following applicable mechanical codes. Power down the air handling unit before making any duct connections. Secure the fitting with sheet metal screws and seal all joints with UL 181-listed duct tape or mastic sealant per local mechanical code requirements. Do not use this fitting in high-pressure or commercial duct systems rated above the capacity of 24-gauge galvanized construction.
Technical Specifications
- Small End Diameter: 4 inches
- Large End Diameter: 5 inches
- Gauge: 24 GA
- Material: Galvanized Steel
- Large End: Crimped
- Package Quantity: 10 per package
- Weight: 6.12 pounds
Standard Information
- Brand: IMPERIAL MFG GROUP USA INC
- Manufacturer Part Number: GV1419









