Imperial GV0838 3 Inch Round Top Collar 30 Gauge Galvanized

Product Description

The IMPERIAL MFG GROUP USA INC GV0838 is a 3-inch round top collar manufactured from 30-gauge galvanized steel with a crimped end for secure duct connections. Top collars serve as the transition fitting between a register boot or starting collar and the round duct run above, directing conditioned air from the duct system into the living space. The crimped end allows the collar to slip into standard round duct without reducing airflow or requiring additional adapters. This fitting is sold in a package of 12 units, making it well suited for residential new-construction projects or multi-unit retrofit work where multiple diffusers or registers are being set at once.

This collar is used in residential forced-air HVAC systems where round duct connects to ceiling, floor, or sidewall registers. It is appropriate for light-gauge supply or return air applications in standard residential ductwork. HVAC installers and sheet metal contractors typically incorporate this fitting during rough-in when running 3-inch round branch runs to individual supply points. The galvanized finish provides corrosion resistance in both conditioned space and unconditioned attic or crawlspace installations.

Key Features

• 3-inch diameter fits standard residential round duct branch runs
• 30-gauge galvanized steel construction resists corrosion in unconditioned spaces
• Crimped end allows direct insertion into round duct without additional adapters
• Packaged in quantities of 12 for efficient multi-outlet installations
• Galvanized finish suitable for attic, crawlspace, and conditioned-space applications

Compatibility

Designed as an OEM-style replacement or new-installation fitting for standard 3-inch round duct systems in residential forced-air HVAC applications.

Installation Notes

Installation is typically performed by a licensed HVAC technician or sheet metal contractor. Power down the air handling unit before accessing the duct system. Secure the collar to the duct with at least two sheet metal screws and seal all joints with listed duct tape or mastic per local mechanical code requirements. Do not use this fitting on flue, exhaust, or combustion air duct applications.