{"product_id":"oem-goodman-piston-kit-for-gmpv075-3-furnace-b1789859","title":"OEM Goodman Piston Kit for GMPV075-3 Furnace — B1789859","description":"\u003cp\u003eThe \u003cstrong\u003eGoodman B1789859 Piston Kit\u003c\/strong\u003e is a genuine OEM replacement designed for the \u003cstrong\u003eGMPV075-3\u003c\/strong\u003e gas furnace. The piston (also called the orifice or spud) meters the flow of gas into the burner assembly, and its precise bore size is what sets the correct firing rate and BTU output for your furnace. A worn, sooted, or incorrectly sized piston causes lazy flames, delayed ignition, and poor combustion efficiency.\u003c\/p\u003e\u003cp\u003eUsing the factory-specified B1789859 kit guarantees the orifice diameter matches your unit's original design specification, keeping the furnace burning clean, safe, and to rated capacity.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Part Number:\u003c\/strong\u003e B1789859\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Piston \/ Orifice Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Model:\u003c\/strong\u003e Goodman GMPV075-3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEquipment:\u003c\/strong\u003e Gas Furnace\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Machined brass orifice\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFit:\u003c\/strong\u003e Direct OEM replacement\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eChoose the \u003cstrong\u003eOEM B1789859\u003c\/strong\u003e for a factory-calibrated bore that preserves your furnace's rated BTU output and safe combustion. Generic aftermarket orifices may vary in drill size or thread pitch, which can throw off the gas\/air mixture. For a safety-critical fuel component like this, OEM is strongly recommended.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eModerate\u003c\/strong\u003e — requires shutting off gas, removing the burner assembly, and swapping the orifice. A licensed HVAC technician should verify manifold pressure and flame after installation.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058151047539,"sku":"GOODMAN-12135","price":9.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-piston-kit-for-gmpv075-3-furnace-b1789859","provider":"National HVAC Parts","version":"1.0","type":"link"}