{"product_id":"oem-goodman-piston-flowrator-kit-for-asz130241aa-b1789857","title":"OEM Goodman Piston \/ Flowrator Kit for ASZ130241AA — B1789857","description":"\u003ch2\u003eGoodman B1789857 Piston Kit\u003c\/h2\u003e\u003cp\u003eThe B1789857 is a genuine OEM metering piston (flowrator) kit for Goodman ASZ130241AA 13 SEER, 2-ton heat pumps. The fixed-orifice piston meters liquid refrigerant into the evaporator or condenser coil, setting the pressure drop that governs proper superheat and capacity. Using the factory-specified orifice size is essential for correct system performance and efficiency.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eOEM Part Number: B1789857\u003c\/li\u003e\n\u003cli\u003eBrand: Goodman (Amana-compatible)\u003c\/li\u003e\n\u003cli\u003eEquipment: ASZ130241AA condensing heat pump\u003c\/li\u003e\n\u003cli\u003eType: Fixed-orifice metering piston (flowrator) with retainer\u003c\/li\u003e\n\u003cli\u003eKit includes: Piston, O-ring\/seal, and retainer as supplied by Goodman\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThe orifice diameter on a metering piston is matched to tonnage and coil design down to the thousandth of an inch. An OEM B1789857 guarantees the exact bore Goodman engineered for the ASZ13 system. Generic pistons in the wrong size cause flooding, starving, poor superheat, and reduced efficiency.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eRating: Professional.\u003c\/strong\u003e Access requires opening the sealed refrigerant circuit at the piston housing, so recovery, evacuation, and recharge by an EPA-certified technician are needed. Once the housing is open, the piston swap itself is quick, but the sealed-system work must be done by a pro.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eCompatibility note: Confirm your model and coil match before ordering.\u003c\/em\u003e\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058304500083,"sku":"GOODMAN-16147","price":9.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-piston-flowrator-kit-for-asz130241aa-b1789857","provider":"National HVAC Parts","version":"1.0","type":"link"}