{"product_id":"oem-goodman-piston-flowrator-kit-for-ash130481aa-b1789884","title":"OEM Goodman Piston \/ Flowrator Kit for ASH130481AA — B1789884","description":"\u003cp\u003eThe Goodman \u003cstrong\u003eB1789884 Piston Kit\u003c\/strong\u003e is a genuine OEM flowrator (fixed-orifice metering device) for the \u003cstrong\u003eASH130481AA\u003c\/strong\u003e heat pump. The piston meters refrigerant into the indoor or outdoor coil, setting the correct pressure drop and superheat for efficient operation. Using the factory-specified piston is essential — an incorrectly sized orifice causes poor capacity, high head pressure, or compressor flooding.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eOEM Part Number: B1789884\u003c\/li\u003e\n\u003cli\u003eBrand: Goodman\u003c\/li\u003e\n\u003cli\u003eCategory: Piston \/ Flowrator Metering Device\u003c\/li\u003e\n\u003cli\u003eCompatible Equipment: ASH130481AA Heat Pump\u003c\/li\u003e\n\u003cli\u003eFactory-drilled orifice sized to unit tonnage and charge\u003c\/li\u003e\n\u003cli\u003eDrops into the existing distributor body — no re-piping\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eGeneric piston assortments require you to guess the bore diameter; an over- or under-sized orifice throws off superheat and can damage the compressor over time. This genuine OEM B1789884 arrives with the exact orifice Goodman engineered for the ASH130481AA, guaranteeing correct metering out of the box.\u003c\/p\u003e\u003ch3\u003eInstall Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eIntermediate (3\/5).\u003c\/strong\u003e The piston seats inside the refrigerant distributor, so it requires recovery of the charge, opening the metering body, swapping the piston, then evacuation and recharge. Best performed by a certified technician during a coil or valve service.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058302730611,"sku":"GOODMAN-16068","price":5.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-piston-flowrator-kit-for-ash130481aa-b1789884","provider":"National HVAC Parts","version":"1.0","type":"link"}