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The Goodman 0128F00006 Chimney Transition Bottom is the genuine OEM vent component for the ACVC80803BXBC gas furnace. This transition piece seals the bottom of the flue collector to the chimney connector, maintaining proper draft and combustion-gas routing. A correct, leak-free transition is essential for safe venting, so always replace a corroded or damaged piece with the exact factory part.
The OEM 0128F00006 is dimensionally matched to the factory flue collector for a gap-free, code-compliant seal. Generic transition pieces may require trimming, gasketing, or sealant and risk improper draft. For a combustion-vent part, OEM fitment is strongly recommended.
Easy–Moderate (2/5). A basic hand-tool replacement, but combustion venting is safety-critical — verify draft and check for flue gas leaks after installation, or have a licensed HVAC technician perform the work.