Duravent 0404PI B-vent Round Rigid Pipe 4x48 Double Wall

Product Description

The DURAVENT 0404PI is a double-wall, air-insulated B-vent round rigid pipe section designed for Category I natural draft gas appliance venting systems. Measuring 4 inches in diameter and 48 inches in length, this pipe section is built for long vent runs where consistent draft performance and safe flue gas conveyance are required. The double-wall air-insulated design maintains flue gas temperature to support proper draft throughout the vent system. Connections are made via a twist-lock mechanism, keeping installation straightforward for HVAC technicians and plumbers working with gas appliance venting.

This pipe section is suited for residential and light commercial gas appliance installations where Category I B-vent systems are specified. Typical applications include venting natural gas furnaces, boilers, and water heaters routed through interior chases or along walls. The 48-inch section length reduces the number of joints needed on longer vent runs, which is an advantage in straight vertical or horizontal runs within the allowable slope parameters for B-vent systems.

Key Features

• Double-wall air-insulated construction maintains flue gas temperature for reliable natural draft
• 4-inch diameter x 48-inch length suits long interior vent runs
• Twist-lock connection system for secure, tool-minimal field assembly
• Round rigid pipe profile for use in Category I gas appliance venting systems
• Designed for use with natural draft gas appliances including furnaces, boilers, and water heaters

Compatibility

Designed as an OEM-style replacement and standard component for Category I B-vent gas appliance venting systems requiring 4-inch diameter round rigid pipe sections.

Installation Notes

Installation should be performed by a licensed HVAC technician or plumber in accordance with NFPA 54 (National Fuel Gas Code) and local authority having jurisdiction requirements. Shut off gas supply and allow the appliance to cool fully before servicing or extending an existing vent system. Verify proper slope, clearances to combustibles, and support spacing per the manufacturer instructions and applicable codes before completing the installation. Do not mix B-vent components from different manufacturers within the same vent system unless compatibility is verified.

Technical Specifications

• Pipe Diameter: 4 inches
• Pipe Length: 48 inches
• Wall Construction: Double-wall air-insulated
• Pipe Shape: Round
• Pipe Type: Rigid
• Vent Category: Category I (B-Vent)
• Connection Type: Twist-lock

Standard Information

• Brand: DURAVENT
• Manufacturer Part Number: 0404PI