{"product_id":"oem-goodman-flow-check-piston-kit-for-gsc130481ba-b1789888-1","title":"OEM Goodman Flow Check Piston Kit for GSC130481BA — B1789888","description":"\u003cp\u003eThe \u003cstrong\u003eGoodman B1789888\u003c\/strong\u003e is a genuine OEM flow check piston (orifice) kit engineered for the \u003cstrong\u003eGSC130481BA\u003c\/strong\u003e air conditioning system. The flow check piston is the refrigerant metering device installed at the indoor coil; it regulates the precise flow of refrigerant into the evaporator, ensuring correct superheat, efficient cooling, and proper system charge. An incorrectly sized or worn piston causes poor cooling, frosting, or compressor strain.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eOEM Part Number: B1789888\u003c\/li\u003e\n\u003cli\u003eType: Flow check piston \/ metering orifice kit\u003c\/li\u003e\n\u003cli\u003eApplication: Refrigerant metering at evaporator coil\u003c\/li\u003e\n\u003cli\u003eFits: Goodman GSC130481BA air conditioner\u003c\/li\u003e\n\u003cli\u003eBrand: Goodman (OEM)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThis \u003cstrong\u003efactory OEM piston\u003c\/strong\u003e is bored to the exact orifice diameter specified for the GSC130481BA, guaranteeing correct refrigerant flow. Generic universal piston assortments require matching the bore size manually and risk improper metering if the wrong size is installed. OEM removes the guesswork and protects system efficiency.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eAdvanced.\u003c\/strong\u003e Replacing the piston requires recovering refrigerant, opening the liquid-line connection at the coil, and recharging the system — work that must be done by an EPA-certified HVAC technician. Estimated time: 1–2 hours.\u003c\/p\u003e\u003cp\u003eCompatible with model GSC130481BA. Confirm the correct piston\/orifice size for your system before ordering.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63057197433203,"sku":"GOODMAN-744","price":10.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-flow-check-piston-kit-for-gsc130481ba-b1789888-1","provider":"National HVAC Parts","version":"1.0","type":"link"}