{"product_id":"oem-goodman-piston-metering-kit-for-anz130301aa-heat-pump-b1789865","title":"OEM Goodman Piston \/ Metering Kit for ANZ130301AA Heat Pump — B1789865","description":"\u003cp\u003eThe Goodman \u003cstrong\u003eB1789865 Piston Kit\u003c\/strong\u003e is a genuine OEM refrigerant metering device (flowrator piston) sized for the \u003cstrong\u003eANZ130301AA\u003c\/strong\u003e heat pump. The piston seats inside the liquid-line orifice housing and controls refrigerant flow into the coil, setting the correct pressure drop and superheat for efficient heat transfer in both heating and cooling modes.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eOEM Part Number: B1789865\u003c\/li\u003e\n\u003cli\u003ePart Type: Fixed-orifice piston \/ flowrator\u003c\/li\u003e\n\u003cli\u003eCompatible Model: ANZ130301AA (Goodman heat pump)\u003c\/li\u003e\n\u003cli\u003eEquipment Type: Heat Pump\u003c\/li\u003e\n\u003cli\u003eFactory-calibrated orifice bore for matched-system capacity\u003c\/li\u003e\n\u003cli\u003eBrass body with filter screen\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003ePiston sizing is everything. The B1789865 is bored to the exact orifice diameter Goodman specifies for the ANZ130301AA matched system. An incorrectly sized generic piston will starve or flood the coil, hurting capacity, efficiency, and compressor life. Because the price difference over a generic is negligible, the genuine OEM piston is always the smart buy.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eIntermediate (3\/5).\u003c\/strong\u003e The piston is accessed by recovering refrigerant and opening the flare\/orifice housing at the liquid line — no brazing required, but the system must be recovered, evacuated, and recharged. EPA 608 certification is required. A qualified technician can complete the swap in under an hour.\u003c\/p\u003e\u003cp\u003eKeep your ANZ130301AA metering correctly with the factory-specified piston.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058265506163,"sku":"GOODMAN-15156","price":6.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-piston-metering-kit-for-anz130301aa-heat-pump-b1789865","provider":"National HVAC Parts","version":"1.0","type":"link"}