Duravent 04ARF B-vent Adjustable Roof Flashing 4 in

Product Description

The DURAVENT 04ARF is an adjustable roof flashing designed for 4-inch B-vent gas appliance venting systems. It creates a weathertight seal at the roof penetration point where the vent pipe exits the structure. The flashing adjusts to accommodate roof pitches from flat up to 6/12, making it suitable for a range of residential roof slopes without requiring a separate pitch-specific part. Licensed HVAC technicians and gas appliance installers use this component as part of a complete B-vent installation on natural gas or propane appliances such as furnaces, boilers, and water heaters.

This flashing is used in residential B-vent installations where a 4-inch vent pipe penetrates a sloped or flat roof. It is installed at the final stage of a vertical B-vent run, sitting at the roof deck to prevent water infiltration around the vent pipe. The adjustable design covers the most common residential roof pitch range, reducing the need for jobsite-specific fabrication. It is intended for use with standard Type B double-wall gas vent systems.

Key Features

• Adjustable pitch range from flat to 6/12 roof slope accommodates a wide variety of residential roof configurations
• Sized for 4-inch B-vent pipe, compatible with standard Type B double-wall gas vent systems
• Provides a weathertight seal at the roof penetration to prevent water infiltration
• Single-component design reduces parts needed on installations with variable roof pitch

Compatibility

Designed as an OEM-style replacement and new-installation component for 4-inch Type B double-wall gas vent systems on residential gas appliances.

Installation Notes

Installation of B-vent roof flashings should be performed by a licensed HVAC technician or qualified gas appliance installer in accordance with NFPA 54 and the appliance manufacturer's venting instructions. Shut down and cool the appliance before servicing any vent components. Seal around the flashing base to the roof surface using an appropriate roofing sealant or flashing material per local building code requirements. Do not compress, restrict, or alter the vent pipe diameter during installation.

Technical Specifications

• Pipe Diameter: 4 inches
• Pitch Range: Flat to 6/12
• Vent Type: Type B Double-Wall Gas Vent (B-Vent)

Standard Information

• Brand: DURAVENT
• Manufacturer Part Number: 04ARF