Imperial Mfg Group Usa Inc GV1376 Storm Collar 4 in

Product Description

The IMPERIAL MFG GROUP USA INC GV1376 is a 4-inch galvanized steel storm collar designed to seal the gap between a flue pipe or vent stack and the roof penetration point. It creates a weather-tight barrier that prevents rain, debris, and wind-driven moisture from entering the building around the vent pipe. This component is a standard part of single-wall or B-vent chimney and venting installations and is typically installed by HVAC technicians, plumbers, or roofing contractors during new construction or vent system service.

This storm collar is suited for residential and light commercial applications where a 4-inch diameter vent or flue pipe exits through the roof. It fits over the vent stack and seats against the roof flashing to form a continuous moisture barrier. Typical applications include gas furnace venting, water heater flue terminations, and similar gravity or natural-draft venting systems that penetrate the roof deck.

Key Features

• Galvanized steel construction for corrosion resistance in outdoor and rooftop conditions
• 4-inch diameter sizing for standard residential vent and flue pipe applications
• Simple slip-on installation over existing vent stack and roof flashing
• Sold in a package quantity of 6 units, suitable for stocking or multi-unit jobs
• Lightweight design at 2.87 pounds per package for easy handling during roof installation

Compatibility

Designed as an OEM-style replacement or new-installation storm collar for 4-inch diameter single-wall galvanized flue pipes and vent stacks in residential venting systems.

Installation Notes

Installation is performed by a qualified HVAC technician, plumber, or roofing contractor following local building codes and applicable venting standards such as the IFGC. Shut off the associated appliance and allow the flue to cool completely before working at the roof penetration. The collar should be slid down over the vent pipe and sealed to the flashing using a high-temperature, weatherproof sealant rated for outdoor rooftop use. Do not rely on the storm collar alone as the primary waterproofing element — proper flashing must be installed beneath it.