Duravent 0312PI B-vent Round Rigid Pipe 3x12 in Double Wall

Product Description

The DURAVENT 0312PI is a double-wall, air-insulated B-vent rigid pipe section designed for extending flue gas exhaust runs in Category I gas appliance venting systems. Measuring 3 inches in diameter and 12 inches in length, this round rigid pipe section connects via a twist-lock mechanism for secure, repeatable assembly. The double-wall construction maintains an air gap between the inner and outer walls, helping manage flue gas temperatures during venting. Licensed HVAC technicians and plumbers install this pipe as part of approved B-vent assemblies serving natural gas and propane appliances.

This pipe section is suited for residential and light commercial Category I gas appliance installations, including gas furnaces, water heaters, and boilers that require Type B venting. It is used when extending an existing B-vent run or completing a new vent system layout where a 3-inch diameter, 12-inch straight section is needed. Its rigid construction makes it appropriate for vertical and appropriately supported horizontal vent runs within an approved B-vent system assembly.

Key Features

• Double-wall air-insulated construction for safe exhaust of flue gases in Category I applications
• 3-inch diameter x 12-inch length for precise run extensions
• Twist-lock connection system for secure, tool-minimal assembly
• Round rigid pipe design maintains consistent flue cross-section throughout the run
• Compatible with standard B-vent system components of the same diameter

Compatibility

Designed as an OEM-style replacement and extension component for Category I gas appliance B-vent systems requiring 3-inch diameter double-wall round rigid pipe sections.

Installation Notes

Installation should be performed by a licensed HVAC technician or plumber in accordance with NFPA 54 and the appliance manufacturer's venting instructions. Shut off the gas supply and allow the appliance to cool completely before servicing or extending any vent run. Ensure all twist-lock joints are fully engaged and that the vent run maintains proper clearances to combustibles as required by local code. Do not mix B-vent components of differing diameters without an approved transition fitting.

Technical Specifications

• Pipe Diameter: 3 inches
• Pipe Length: 12 inches
• Wall Construction: Double-wall air-insulated
• Vent Type: Type B (B-Vent)
• Application: Category I gas appliance venting
• Connection Type: Twist-lock
• Shape: Round rigid pipe

Standard Information

• Brand: DURAVENT
• Manufacturer Part Number: 0312PI