4" x 18" Round Pipe, Type B Gas Vent

The Hart & Cooley 016104 Round Type B Gas Vent Pipe (Model 4RP18) is a precision-engineered venting component designed for professional installation in natural gas and propane-fired appliance systems. This 18-inch section of 4-inch diameter vent pipe provides a secure, code-compliant flue connection within Type B vent systems. Manufactured with a double-wall design using an aluminum inner liner and a galvanized steel outer casing, the 4RP18 ensures corrosion resistance, mechanical stability, and consistent performance in high-temperature venting applications.

Details

• Model Number: 016104
• Manufacturer: Hart & Cooley
• Product Type: Round Type B Gas Vent Pipe
• Series: RP
• Part Number: 114803
• Nominal Diameter: 4 inch (ID)
• Outside Diameter (OD): 4-1/2 inch
• Length: 18 inch (1-1/2 feet)
• Wall Thickness: 0.012 inch
• Material: Double-wall construction with aluminum inner liner and galvanized steel outer wall
• Connection Type: Twist-lock joint for secure, tool-free mechanical engagement
• Application: Type B gas vent systems for natural gas and LP-fired appliances such as furnaces, boilers, and water heaters
• Temperature Rating: Continuous operation up to 480 °F flue gas temperature
• Orientation: Suitable for vertical or horizontal venting configurations
• Compliance: UL 441 Listed; conforms to NFPA 54 (National Fuel Gas Code) and local mechanical code requirements

Professional Specifications

The Hart & Cooley 4RP18 vent pipe section is designed to provide efficient, code-compliant flue gas conveyance within professional Type B venting systems. The aluminum inner liner delivers smooth gas flow and corrosion protection from acidic condensate, while the galvanized steel outer casing offers superior mechanical durability and resistance to environmental exposure. The double-wall configuration minimizes heat transfer and maintains required clearance to combustibles. The precision-formed twist-lock ends ensure quick, tool-free assembly and a gas-tight connection. Each section is manufactured to strict dimensional tolerances to ensure full compatibility and consistent performance across all Hart & Cooley RP Series components.

Summary

The Hart & Cooley 016104 (4RP18) 4-inch Type B Round Gas Vent Pipe provides a UL-listed, code-compliant venting solution for professional HVAC and mechanical systems. Its 18-inch length, dual-wall aluminum and steel construction, and precision twist-lock design ensure safe, durable, and reliable performance in both residential and commercial gas venting applications.