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The Goodman 10716003 is a genuine OEM natural gas burner orifice (spud) sized for the WFD18115S5CXCC furnace and compatible Goodman/Amana equipment. This small brass fitting threads into the manifold and meters the precise volume of natural gas delivered to each burner. Its drill size is matched to the furnace's rated BTU input, so a correct orifice is essential for a clean, blue flame and efficient, safe combustion.
Orifice bore diameter directly controls firing rate. The OEM Goodman spud guarantees the factory-specified drill size; a generic orifice with a slightly larger or smaller bore will over- or under-fire the furnace, causing sooting, delayed ignition, or nuisance limit trips. On a gas-metering part, buy the OEM size.
Easy (1/5) — Shut off the gas supply, remove the burner, and unthread the orifice with a nut driver. Verify you are ordering the natural-gas (not LP) part number. Always leak-test the connection with soapy water after reinstalling. About 10 minutes for a technician.