4" x 12" Round Pipe, Type B Gas Vent

The Hart & Cooley 016105 Round Type B Gas Vent Pipe (Model 4RP12) is a professional-grade venting component engineered for use in natural gas and propane-fired appliance installations. This 12-inch section of 4-inch diameter vent pipe provides a secure, code-compliant flue connection within Type B gas vent systems. Constructed with a double-wall aluminum inner liner and galvanized steel outer casing, the 4RP12 ensures reliable performance, corrosion resistance, and structural integrity under continuous high-temperature operating conditions.

Details

• Model Number: 016105
• Manufacturer: Hart & Cooley
• Product Type: Round Type B Gas Vent Pipe
• Series: RP
• Part Number: 113462
• Nominal Diameter: 4 inch (ID)
• Outside Diameter (OD): 4-1/2 inch
• Length: 12 inch (1 foot)
• Wall Thickness: 0.012 inch
• Material: Double-wall construction with aluminum inner liner and galvanized steel outer wall
• Connection Type: Twist-lock joint system for secure mechanical engagement
• Application: Type B vent systems for gas-fired appliances including furnaces, boilers, and water heaters
• Temperature Rating: Continuous operation up to 480 °F flue gas temperature
• Orientation: Suitable for vertical and horizontal venting configurations
• Compliance: UL 441 Listed; conforms to NFPA 54 (National Fuel Gas Code) and applicable local mechanical codes

Professional Specifications

The Hart & Cooley 4RP12 vent pipe section is designed to provide efficient flue gas passage and maintain mechanical integrity within Type B venting assemblies. The aluminum inner liner ensures smooth gas flow and resists corrosion caused by acidic condensates, while the galvanized steel outer wall enhances structural rigidity and environmental durability. The double-wall construction reduces external surface temperature, maintaining proper clearance to combustibles as required by code. Precision-formed twist-lock ends allow for quick, tool-free installation and ensure a tight, secure connection between vent sections. Each pipe is manufactured to tight dimensional tolerances to ensure uniform fitment across the RP Series product line.

Summary

The Hart & Cooley 016105 (4RP12) 4-inch Type B Round Gas Vent Pipe provides a durable, UL-listed venting solution for professional HVAC and mechanical applications. Its 12-inch length, double-wall aluminum and steel construction, and precision twist-lock design ensure long-term, code-compliant performance in both residential and commercial gas-fired venting systems.