{"product_id":"oem-goodman-43-burner-orifice-for-adv80703bxbb-b4089343","title":"OEM Goodman #43 Burner Orifice for ADV80703BXBB — B4089343","description":"\u003ch2\u003eGoodman B4089343 #43 Burner Orifice\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\u003eB4089343\u003c\/strong\u003e is a genuine OEM #43 drill-size burner orifice (gas spud) for the Goodman\/Amana \u003cstrong\u003eADV80703BXBB\u003c\/strong\u003e gas furnace. Threaded into the gas manifold, each orifice meters the precise volume of gas fed to its in-shot burner, setting the furnace's firing rate and BTU input. A clogged, corroded, or wrong-size orifice throws off the air\/fuel mixture and causes under- or over-firing, poor flame quality, and efficiency loss. The #43 sizing is calibrated for natural gas at standard manifold pressure on this model.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003ePart Number: B4089343\u003c\/li\u003e\n\u003cli\u003eType: Burner orifice \/ gas spud\u003c\/li\u003e\n\u003cli\u003eOrifice Size: #43 drill\u003c\/li\u003e\n\u003cli\u003eFuel: Natural gas (verify manifold pressure)\u003c\/li\u003e\n\u003cli\u003eFits: Goodman\/Amana ADV80703BXBB and compatible ADV-series manifolds\u003c\/li\u003e\n\u003cli\u003eFunction: Meters gas flow to a single in-shot burner\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eGenuine Goodman orifices are precision-drilled to the exact #43 bore and thread pitch specified for this furnace, so firing rate and BTU input stay within spec. Generic orifices can vary in bore diameter, altering input and combustion safety margins. Because orifice sizing is combustion-critical, OEM is the recommended choice — and orifices should be sized to the fuel type and altitude of the installation.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eModerate (3\/5).\u003c\/strong\u003e Requires shutting off the gas, removing the manifold or burner assembly, unthreading the old orifice, and installing the new spud without cross-threading. About 30–45 minutes. A post-install combustion\/manifold-pressure check is strongly recommended.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63057511350643,"sku":"GOODMAN-3434","price":5.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-43-burner-orifice-for-adv80703bxbb-b4089343","provider":"National HVAC Parts","version":"1.0","type":"link"}