Duravent 0704PI B-vent Round Rigid Pipe 7x48 in Double Wall

Product Description

The DURAVENT 0704PI is a double wall air-insulated B-vent round rigid pipe section rated for Category I gas appliance venting systems. It measures 7 inches in diameter and 48 inches in length, making it well-suited for long straight vent runs where consistent draft is critical. The double wall air-insulated construction maintains flue gas temperature to support proper natural draft and reduce the risk of condensation within the vent system. Twist-lock connections secure each section during assembly. Licensed gas technicians and HVAC mechanics typically install this pipe as part of a complete B-vent system serving gas furnaces, boilers, and water heaters.

This pipe section is designed for residential and light commercial Category I gas appliance installations where a Type B double wall vent is required. It is used in vertical and nearly vertical vent runs connected to natural gas or propane appliances with positive draft and non-positive vent pressure. The 48-inch length reduces the number of joints needed in long runs, improving system integrity and simplifying layout in attic, chase, or utility room installations.

Key Features

• 7-inch diameter accommodates common residential and light commercial Category I appliance vent connections
• 48-inch rigid section length minimizes joint count in long vent runs
• Double wall air-insulated construction maintains flue gas temperature for reliable natural draft
• Twist-lock connection system allows secure, tool-minimal field assembly
• Designed for Category I gas appliance venting with non-positive vent pressure

Compatibility

Designed as an OEM-style replacement and new-installation component for Category I gas appliance B-vent systems requiring 7-inch diameter double wall round rigid pipe sections.

Installation Notes

Installation must be performed by a licensed HVAC technician or gas appliance installer in accordance with the appliance manufacturer instructions, NFPA 54 (National Fuel Gas Code), and all applicable local codes. Shut off the gas supply and allow the appliance to cool completely before servicing or extending any vent system. Maintain required clearances to combustibles as specified for Type B vent and verify that all twist-lock joints are fully engaged before restoring service. Do not mix B-vent components from different manufacturers without confirming cross-brand compatibility.

Technical Specifications

• Diameter: 7 inches
• Length: 48 inches
• Construction: Double Wall Air-Insulated
• Vent Type: Type B (B-Vent)
• Connection Type: Twist-Lock
• Appliance Category: Category I

Standard Information

• Brand: DURAVENT
• Manufacturer Part Number: 0704PI