Duravent 0412PI B-vent Round Rigid Pipe 4x12 in Double Wall

Product Description

The DURAVENT 0412PI is a double-wall, air-insulated B-vent round rigid pipe section designed for extending vent runs in Category I gas appliance systems. With a 4-inch diameter and 12-inch length, this pipe section handles the safe exhaust of flue gases from natural gas and propane appliances. The double-wall construction maintains proper draft and reduces heat transfer to surrounding materials. Twist-lock connections simplify assembly and help maintain a secure, gas-tight vent run. Licensed HVAC technicians and plumbers install this type of component as part of listed B-vent venting systems.

This pipe section is suited for residential and light-commercial applications where a Category I, fan-assisted or natural-draft gas appliance requires a code-compliant B-vent exhaust system. Typical installations include gas furnaces, water heaters, boilers, and other Category I appliances vented through interior or exterior vent chases. The 12-inch length makes it useful for fine-tuning vent run dimensions or completing short transitions between fittings and appliance collars.

Key Features

• 4-inch diameter x 12-inch length for precise vent run extensions
• Double-wall air-insulated construction for safe flue gas exhaust
• Twist-lock connection system for fast, secure assembly
• Round rigid pipe design maintains consistent airflow and draft
• Listed for use in Category I gas appliance venting systems

Compatibility

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

Installation Notes

Installation must be performed by a licensed HVAC technician or plumber in accordance with NFPA 54 (National Fuel Gas Code) and local mechanical codes. Shut off the gas supply and allow the appliance to cool completely before servicing any vent components. Ensure all twist-lock joints are fully engaged and that the vent run maintains the required clearances to combustibles as specified by the listing. Do not mix B-vent components from different listing systems without verifying compatibility.

Technical Specifications

• Diameter: 4 inches
• Length: 12 inches
• Construction: Double wall, air-insulated
• Connection Type: Twist-lock
• Vent Category: Category I
• Pipe Shape: Round rigid

Standard Information

• Brand: DURAVENT
• Manufacturer Part Number: 0412PI