This Aluminum 12 Inch Double-Wall Flex Connector with 4 Inch Inner Diameter from the DuraConnect II series is a Type B gas component and consists of the duralock system for a tight seal. Use as a connector system to replace rigid gas vent with a flexible section. DuraConnect II can be used when Type B gas vent double-wall connector is required. Not to be enclosed and cannot penetrate through walls, floors, or ceilings. Twist-lock connectors on each end.

DuraConnect II’s heavy-duty construction features precision twist lock connection, which provides ease of assembly or disassembly without damage to the product. The double-wall flexible vent is certified as having the equivalent thermal properties as Type B Gas Vent and can be used when a Type B Gas Vent double-wall connector is required. Double-wall connector pipe, UL approved as a Type B Gas Vent segment, for use in conditioned and unconditioned attics and crawl spaces. DuraVent’s DuraConnect II is known as the “Contractor’s Choice” for its ease of installation and durability.

Specifications

• Pipe Shape: Round
• Pipe Class: Type B
• Vent Construction: Double Wall
• Fuel Type: Gas, Liquid Propane
• Inner Pipe Material: Aluminum
• Outer Pipe Material: Galvalume
• Inner Diameter: 4″
• Length: 12″