{"product_id":"oem-goodman-piston-kit-for-gsc130481ag-b1789882-1","title":"OEM Goodman Piston Kit for GSC130481AG — B1789882","description":"\u003cp\u003eThe \u003cstrong\u003eGoodman B1789882\u003c\/strong\u003e is a genuine OEM piston (flowrator) kit for the \u003cstrong\u003eGSC130481AG\u003c\/strong\u003e condensing unit. The piston is the fixed-orifice metering device that controls refrigerant flow into the evaporator coil. Using the correctly sized piston is critical: an undersized or oversized orifice causes poor subcooling\/superheat, reduced capacity, and potential compressor damage. This kit delivers the factory-specified bore for proper system charge and performance.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e B1789882\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Fixed-orifice piston \/ flowrator kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFunction:\u003c\/strong\u003e Refrigerant metering at the coil\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Matched to GSC130481AG capacity\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits Model:\u003c\/strong\u003e GSC130481AG\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\u003eThis \u003cstrong\u003egenuine OEM\u003c\/strong\u003e piston is bored to Goodman's exact specification for this unit. Generic pistons may be mislabeled or sized for a different tonnage, leading to incorrect metering and service callbacks. For a metering device, matching the factory orifice is non-negotiable — choose OEM.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eAdvanced.\u003c\/strong\u003e Replacing a piston requires recovering the refrigerant charge, opening the liquid-line connection at the coil, swapping the piston, then evacuating and recharging the system. This must be performed by an EPA-certified technician with proper recovery and vacuum equipment.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63057197334899,"sku":"GOODMAN-739","price":10.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-piston-kit-for-gsc130481ag-b1789882-1","provider":"National HVAC Parts","version":"1.0","type":"link"}