{"product_id":"oem-goodman-piston-orifice-kit-for-gmp125-5-b1789882","title":"OEM Goodman Piston \/ Orifice Kit for GMP125-5 — B1789882","description":"\u003ch2\u003eGenuine Goodman B1789882 Piston Kit\u003c\/h2\u003e\u003cp\u003eThe Goodman B1789882 is an OEM piston (fixed-orifice) kit designed for the Goodman GMP125-5 platform and compatible Goodman\/Amana equipment. The piston is the refrigerant metering device that controls flow into the evaporator coil, setting the system's superheat and cooling capacity. Installing the factory-specified piston is essential to hitting rated performance and protecting the compressor from flooding or starvation.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eOEM Part Number: B1789882\u003c\/li\u003e\n\u003cli\u003eType: Piston \/ fixed-orifice metering device kit\u003c\/li\u003e\n\u003cli\u003eFunction: Meters refrigerant flow into the evaporator coil\u003c\/li\u003e\n\u003cli\u003eBore: Precision-drilled to Goodman factory spec\u003c\/li\u003e\n\u003cli\u003eCompatible Model: Goodman GMP125-5 (and select Goodman\/Amana systems)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003ePiston bore diameter is matched to tonnage and refrigerant charge. The OEM B1789882 is drilled to the exact size Goodman engineered for this system, so superheat and subcooling land in spec. A wrong-bore generic piston degrades efficiency, causes coil freeze-ups or high head pressure, and can shorten compressor life. Always match the OEM part or the manufacturer's charging chart.\u003c\/p\u003e\u003ch3\u003eInstall Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eAdvanced (4\/5)\u003c\/strong\u003e — Requires recovering the refrigerant charge, opening the liquid-line connection, swapping the piston in the distributor, and evacuating\/recharging the system. This is EPA Section 608 refrigerant work and should be performed by a certified HVAC technician.\u003c\/p\u003e\u003cp\u003eDo not attempt without proper recovery equipment and certification.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058138005875,"sku":"GOODMAN-11919","price":12.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-piston-orifice-kit-for-gmp125-5-b1789882","provider":"National HVAC Parts","version":"1.0","type":"link"}