{"product_id":"oem-goodman-43-burner-orifice-for-gmnt070-3b-furnace-b4089343","title":"OEM Goodman #43 Burner Orifice for GMNT070-3B Furnace — B4089343","description":"\u003cp\u003eThe \u003cstrong\u003eGoodman B4089343 Burner Orifice (drill size #43)\u003c\/strong\u003e is a genuine OEM gas spud for \u003cstrong\u003eGMNT070-3B\u003c\/strong\u003e furnaces. The orifice threads into the manifold and precisely meters the volume of gas fed to each in-shot burner. Its bore size directly determines the BTU input, so using the correctly sized orifice is essential for safe combustion, proper heat rise, and rated efficiency. A damaged, corroded, or incorrectly drilled orifice can cause underfiring, overfiring, or sooting.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Threaded brass burner orifice \/ spud\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill size:\u003c\/strong\u003e #43\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuel:\u003c\/strong\u003e Natural gas (verify vs. LP conversion kit)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Machined brass\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e Goodman GMNT070-3B and related manifolds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Part #:\u003c\/strong\u003e B4089343\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eGas orifices are a \u003cstrong\u003elife-safety metering component\u003c\/strong\u003e — the drilled bore must match the appliance rating plate exactly. Genuine Goodman orifices are precision-drilled and gauged to the #43 spec. Generic or hand-drilled orifices risk incorrect gas flow, which can produce carbon monoxide or damage the heat exchanger. OEM is strongly recommended here.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eEasy (2\/5).\u003c\/strong\u003e Shut off the gas, remove the manifold or unthread the individual spud, and install the matching orifice with thread sealant rated for gas. Confirm manifold pressure and combustion with a licensed technician after service.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058129092979,"sku":"GOODMAN-11661","price":5.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-43-burner-orifice-for-gmnt070-3b-furnace-b4089343","provider":"National HVAC Parts","version":"1.0","type":"link"}