Duravent 0412ADJ B-vent Round Adjustable Pipe 4x12 in

Product Description

The DURAVENT 0412ADJ is a round adjustable B-vent pipe section designed for natural gas and propane appliance venting systems. With a nominal 4-inch diameter and a 12-inch nominal length, the pipe adjusts from 3.5 inches to 10.5 inches to accommodate precise field measurements during installation. This flexibility reduces the need for field cutting and allows installers to fine-tune vent runs without additional fittings. Licensed HVAC technicians and plumbers rely on adjustable sections like this to close gaps between fixed-length pipe segments in residential and light commercial B-vent systems.

This adjustable pipe section is suited for residential and light commercial gas appliance installations where B-vent systems are required. Typical applications include venting upward from gas furnaces, water heaters, boilers, and other Category I appliances that rely on natural draft. The adjustable design is especially useful when transitioning between fixed vent lengths, accommodating structural framing, or making up final connections to a vent cap or vent connector. It is installed in vertical or near-vertical vent runs consistent with B-vent system requirements.

Key Features

• Adjustable length from 3.5 inches to 10.5 inches for precise field fitting
• 4-inch nominal diameter compatible with standard B-vent system components
• Round pipe construction for consistent airflow and straightforward assembly
• Reduces need for field cutting or additional transition fittings
• Designed for natural draft Category I gas appliance venting

Compatibility

Designed as an OEM-style replacement and new-installation component for 4-inch B-vent venting systems used with natural draft gas appliances.

Installation Notes

Installation must be performed by a qualified HVAC technician or licensed plumber in accordance with the appliance manufacturer instructions and applicable codes, including the International Fuel Gas Code. Always shut down and allow the appliance and any existing vent components to cool before beginning work on a vent system. Maintain proper clearances to combustibles as required by the B-vent system listing and local code. Do not use B-vent components in applications requiring a different vent category or liner type.

Technical Specifications

• Pipe Diameter: 4 inches
• Nominal Length: 12 inches
• Adjustable Length Range: 3.5 inches to 10.5 inches
• Pipe Shape: Round
• Vent Type: B-Vent

Standard Information

• Brand: DURAVENT
• Manufacturer Part Number: 0412ADJ