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The DUC-PAC 97520 is a 26-gauge round smoke pipe section measuring 4 inches in diameter and 2 feet in length, designed for venting applications in forced-air heating systems. Fabricated from steel sheet stock at 26 gauge, this pipe section provides a rigid, durable connection point in single-wall smoke pipe runs. It is a standard component used by HVAC technicians and sheet metal installers when constructing or servicing venting assemblies for gas- or oil-fired appliances, including furnaces and boilers that require single-wall vent connector pipe.
This smoke pipe section fits into residential and light commercial venting configurations where single-wall connector pipe is code-permitted between the appliance flue collar and the chimney or vent terminal. The 4-inch diameter suits a range of smaller forced-air furnaces and heating appliances with matching flue collar sizes. It is a common stock item on service vehicles and in wholesale supply houses serving residential HVAC installation crews.
Designed as a standard single-wall round smoke pipe connector for residential forced-air heating appliances with a 4-inch flue collar outlet. Verify local code requirements before use, as single-wall vent connector pipe has clearance-to-combustibles restrictions that vary by jurisdiction.
Installation of smoke pipe and vent connectors is typically performed by licensed HVAC technicians or qualified sheet metal installers. Always shut down and allow the appliance to cool completely before servicing or replacing any vent connector sections. Follow IFGC and appliance manufacturer venting requirements for minimum clearances to combustibles when using single-wall pipe. Secure all joints with appropriate fasteners and confirm the vent connector pitches correctly back toward the appliance to prevent condensate pooling.
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