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The Goodman 0128F00006 Chimney Transition Bottom is a genuine OEM flue/vent component engineered for the ADVC81005CXAA gas furnace and compatible Goodman/Amana induced-draft platforms. This transition piece channels combustion byproducts from the heat exchanger collector box into the vent connector, forming a sealed, code-compliant path to the flue. A correct-fitting transition is critical for proper draft, safe venting, and reliable pressure-switch operation.
The genuine OEM 0128F00006 is stamped to exact factory dimensions so gasket surfaces and mounting holes line up on the first try — no leaks, no rework. Generic or fabricated transitions often require trimming and re-sealing, and a poor seal can trip the pressure switch or cause improper venting. For a combustion-path component, OEM is the safe choice.
Moderate. Requires shutting off gas and power, removing the vent connector, and re-sealing with approved high-temperature material. Recommended for experienced DIYers or an HVAC technician. Verify draft after installation.