{"product_id":"oem-goodman-piston-kit-flowrator-for-gsc130483af-b1789882-1","title":"OEM Goodman Piston Kit (Flowrator) for GSC130483AF — B1789882","description":"\u003cp\u003eThe \u003cstrong\u003eGoodman B1789882 Piston Kit\u003c\/strong\u003e (flowrator) is the genuine OEM refrigerant metering device matched to the \u003cstrong\u003eGSC130483AF\u003c\/strong\u003e condensing unit and compatible GSC13-series air conditioners. The piston meters refrigerant flow into the evaporator coil at the precise orifice size the system was designed around. Using the correct piston is critical: an oversized or undersized orifice causes poor cooling, flooding, frozen coils, or compressor damage. This kit restores factory-specified refrigerant metering.\u003c\/p\u003e\u003cp\u003eThe piston is machined to Goodman's exact bore specification and comes ready to install into the liquid-line connection during a coil or system service.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003ePart Type: Refrigerant metering piston \/ flowrator\u003c\/li\u003e\n\u003cli\u003eOEM Part Number: B1789882\u003c\/li\u003e\n\u003cli\u003eFits Model: GSC130483AF (and compatible GSC13 units)\u003c\/li\u003e\n\u003cli\u003eFunction: Fixed-orifice refrigerant metering\u003c\/li\u003e\n\u003cli\u003eBrand: Goodman (OEM)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003egenuine Goodman OEM\u003c\/strong\u003e piston is bored to the exact size charted for this unit's capacity and refrigerant. Generic pistons may be close but not exact, and an incorrect orifice directly degrades efficiency and risks the compressor. For a metering device, matching the OEM specification is non-negotiable.\u003c\/p\u003e\u003ch3\u003eInstallation\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eDifficulty: Advanced — professional only.\u003c\/strong\u003e Replacing the piston requires opening the sealed refrigerant circuit. A licensed HVAC technician must recover the refrigerant, replace the piston, evacuate the lines, and recharge to spec. EPA Section 608 certification is required to handle refrigerant. This is not a DIY part.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63057197793651,"sku":"GOODMAN-768","price":10.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-piston-kit-flowrator-for-gsc130483af-b1789882-1","provider":"National HVAC Parts","version":"1.0","type":"link"}