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The Goodman 0128F00006 Chimney Transition Bottom is a genuine OEM flue/vent component engineered for the Goodman WGFM28070V4BXAA gas furnace. This transition piece routes combustion gases from the heat exchanger collector box into the vent/chimney connector, maintaining a proper seal and draft path so exhaust exits safely and efficiently.
The OEM 0128F00006 is stamped and formed to factory tolerances so it aligns precisely with the collector box and vent connector — no gaps that could cause flue leaks. Generic transitions may require trimming or extra sealant and can compromise draft. For a combustion-side part, we recommend OEM for a safe, leak-free fit.
Moderate. Requires furnace shutdown, removal of the existing vent connection, and proper re-sealing. Because this is on the flue/exhaust path, we strongly recommend installation by a licensed HVAC technician and a post-install combustion/draft check.