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The Goodman 0128F00006 Chimney Transition Bottom is a genuine OEM flue/vent adapter for the ADVC80603BNBA gas furnace. This transition piece connects the furnace's induced-draft outlet to the venting system, channeling combustion byproducts safely to the chimney or flue. A corroded, warped, or ill-fitting transition can leak flue gases or disrupt draft, so a factory-matched replacement is important for safe, code-compliant venting.
The genuine OEM Goodman transition is stamped to the exact flange and outlet dimensions of the ADVC80603BNBA for a proper, sealed fit. Generic or fabricated adapters risk gaps that allow flue-gas leakage — a carbon monoxide hazard. For any venting component, OEM fit and integrity are non-negotiable.
Moderate (3/5). Requires disconnecting the vent pipe, removing the old transition, sealing with high-temp gasket/sealant as specified, and reconnecting the venting. Plan on 30–45 minutes. All flue connections must be inspected for leaks — a licensed HVAC technician is recommended for venting work.