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The YORK S1-9951-0781 is a gas orifice used in furnace systems. This component regulates gas flow to the burner and is drilled to a specific size of #47, which measures zero point zero seven eight five inches. Correctly installing this orifice ensures optimal burner function.
Essential for effective gas regulation in furnaces.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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