{"product_id":"oem-goodman-metering-piston-kit-for-ash130481ac-heat-pump-b1789884","title":"OEM Goodman Metering Piston Kit for ASH130481AC Heat Pump — B1789884","description":"\u003ch2\u003eGoodman B1789884 Metering Piston Kit\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\u003eB1789884\u003c\/strong\u003e is a genuine Goodman OEM metering piston (flow-restrictor \/ orifice) kit sized for the \u003cstrong\u003eASH130481AC\u003c\/strong\u003e 13 SEER, 4-ton heat pump. The piston seats inside the refrigerant distributor and controls the pressure drop and flow rate into the coil, establishing the correct superheat and subcooling. A worn, wrong-bore, or debris-clogged piston causes poor capacity, iced coils, high head pressure, and comfort complaints — installing the factory-specified piston restores rated performance.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eOEM Part Number: B1789884\u003c\/li\u003e\n\u003cli\u003eFits: Goodman ASH130481AC heat pump\u003c\/li\u003e\n\u003cli\u003eType: Metering piston \/ fixed orifice restrictor kit\u003c\/li\u003e\n\u003cli\u003eBore: Factory-calibrated for ASH130481AC tonnage\u003c\/li\u003e\n\u003cli\u003eIncludes: Piston and seal\/O-ring as applicable\u003c\/li\u003e\n\u003cli\u003eEquipment: Heat Pump (indoor\/outdoor metering device)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThe genuine Goodman piston is bored to the exact diameter the ASH130481AC was engineered for, delivering the correct refrigerant flow. A generic or mismatched-bore piston throws off superheat and can permanently hurt efficiency and coil life. With OEM you get the precise restriction the system was designed around.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty: Professional\u003c\/h3\u003e\u003cp\u003eRated \u003cstrong\u003eProfessional (4\/5)\u003c\/strong\u003e. Requires recovering refrigerant (or isolating the metering device), opening the distributor body, swapping the piston, reassembling with a fresh seal, and recharging to spec. Best performed by a licensed HVAC technician verifying superheat\/subcooling after the change.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63057153491315,"sku":"GOODMAN-B1789884","price":5.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-metering-piston-kit-for-ash130481ac-heat-pump-b1789884","provider":"National HVAC Parts","version":"1.0","type":"link"}