{"product_id":"oem-goodman-piston-kit-for-ash130301aa-heat-pump-b1789865","title":"OEM Goodman Piston Kit for ASH130301AA Heat Pump — B1789865","description":"\u003ch2\u003eGoodman B1789865 Piston (Flowrator) Kit\u003c\/h2\u003e\u003cp\u003eThe Goodman \u003cstrong\u003eB1789865\u003c\/strong\u003e piston kit is a genuine OEM refrigerant metering device engineered for the \u003cstrong\u003eASH130301AA\u003c\/strong\u003e 2.5-ton 13 SEER heat pump. The fixed-orifice piston seats inside the liquid line at the coil to meter the exact volume of refrigerant into the evaporator or condenser coil, keeping superheat and subcooling within factory spec. Using the correctly sized piston is critical — an incorrect bore diameter starves or floods the coil, killing capacity and efficiency.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eOEM Part Number: B1789865\u003c\/li\u003e\n\u003cli\u003eType: Fixed-orifice flowrator piston kit\u003c\/li\u003e\n\u003cli\u003eCompatible Equipment: Goodman ASH130301AA heat pump\u003c\/li\u003e\n\u003cli\u003eApplication: R-410A refrigerant metering\u003c\/li\u003e\n\u003cli\u003eBrand: Goodman (genuine OEM)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eGenuine OEM pistons are bore-calibrated to the tolerance the coil was designed around. Aftermarket universal pistons often vary a few thousandths of an inch, which shifts your charge and shortens compressor life. For a metering component this small, the OEM part is the safe choice.\u003c\/p\u003e\u003ch3\u003eInstall Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eIntermediate\u003c\/strong\u003e — requires recovering refrigerant, opening the liquid line, and re-evacuating\/recharging the system. This is EPA Section 608 certified technician work; not a homeowner DIY job.\u003c\/p\u003e\u003cp\u003eShips fast and backed by our fit guarantee. Questions? Contact info@nationalhvacparts.com.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058301026675,"sku":"GOODMAN-15985","price":6.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-piston-kit-for-ash130301aa-heat-pump-b1789865","provider":"National HVAC Parts","version":"1.0","type":"link"}