{"product_id":"oem-goodman-piston-kit-for-gmp125-4-furnace-b1789882","title":"OEM Goodman Piston Kit for GMP125-4 Furnace — B1789882","description":"\u003cp\u003eThe \u003cstrong\u003eGoodman B1789882 Piston Kit\u003c\/strong\u003e is a genuine OEM metering device (fixed-orifice restrictor) supplied for \u003cstrong\u003eGoodman GMP125-4\u003c\/strong\u003e series equipment. The piston meters refrigerant into the coil at the precise rate the system was engineered for — the correct orifice is essential for rated capacity and efficiency.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Part #:\u003c\/strong\u003e B1789882\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Piston \/ fixed-orifice metering kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Goodman GMP125-4 series\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes:\u003c\/strong\u003e Piston(s) as packaged by Goodman\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Goodman (OEM)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003ePiston bore size is model-specific. An OEM B1789882 guarantees the exact orifice diameter matched to the coil, protecting superheat, subcooling, and capacity. A mismatched aftermarket piston can cause flooding, starving, or a compressor that never reaches rated performance — the small savings are not worth the risk.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eAdvanced\u003c\/strong\u003e — the refrigerant circuit must be recovered, opened, and evacuated. This is EPA Section 608 work and should be performed only by a certified technician. Recover refrigerant properly; do not vent.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eVerify the required piston bore against the equipment charging chart before installing.\u003c\/em\u003e\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058137776499,"sku":"GOODMAN-11911","price":16.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-piston-kit-for-gmp125-4-furnace-b1789882","provider":"National HVAC Parts","version":"1.0","type":"link"}