Imperial Mfg Group Usa Inc GV1383 Rainproof Flashing 4in

Product Description

The IMPERIAL MFG GROUP USA INC GV1383 is a 4-inch galvanized rainproof flashing designed for venting applications requiring a watertight seal at roof penetrations. Constructed from galvanized steel, this flashing is sized for 4-inch flue or vent pipes and features a 1/4 pitch profile to match standard residential roof slopes. It is typically installed by HVAC technicians, plumbers, or roofers when terminating B-vent, Type L, or similar pipe systems through a sloped roof assembly. Each package contains 3 units, making it practical for multi-unit jobs or service van stocking.

This flashing is suited for residential and light commercial installations where a 4-inch vent or flue pipe exits through a pitched roof. The 1/4 pitch designation matches common roof slopes and helps ensure a proper, weatherproof fit at the roof deck. It is commonly used in natural gas, propane, and oil heating system venting configurations, as well as plumbing vent stack terminations. Installers working in new construction or retrofit applications will find the 3-unit package count useful for reducing return trips to the supply house.

Key Features

• Galvanized steel construction for corrosion resistance in outdoor roof environments
• 4-inch opening sized for standard residential vent and flue pipe
• 1/4 pitch profile matches common sloped roof configurations
• Packaged in quantities of 3 per unit of measure
• Rainproof design helps prevent water intrusion at roof penetrations

Compatibility

Designed as an OEM-style replacement or new-installation flashing for 4-inch diameter vent or flue pipe penetrations on 1/4 pitch sloped roofs in residential and light commercial venting systems.

Installation Notes

Installation of roof flashings should be performed by a licensed HVAC technician, plumber, or qualified roofer in accordance with local building codes and the appliance manufacturer's venting instructions. Shut down and allow the heating or venting appliance to cool completely before beginning any roof-level work. Seal the flashing to the roof deck using appropriate roofing caulk or flashing cement per local code requirements. Do not compress or deform the flashing collar, as this can compromise the weatherproof seal around the pipe.