{"product_id":"oem-goodman-flow-check-piston-kit-for-ssx140601ac-b1789888","title":"OEM Goodman Flow Check Piston Kit for SSX140601AC — B1789888","description":"\u003cp\u003eThe \u003cstrong\u003eGoodman B1789888 Flow Check Piston Kit\u003c\/strong\u003e is a genuine OEM refrigerant metering device for the Goodman \u003cstrong\u003eSSX140601AC\u003c\/strong\u003e 14 SEER condensing unit. The flow check piston (orifice) controls refrigerant flow into the evaporator coil, ensuring proper expansion and system charge balance. A correctly sized piston is essential for rated cooling capacity and efficiency.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Part Number:\u003c\/strong\u003e B1789888\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Flow Check Piston \/ Metering Orifice Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Goodman\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Model:\u003c\/strong\u003e SSX140601AC (5-ton, 14 SEER A\/C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFunction:\u003c\/strong\u003e Refrigerant metering device\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFit:\u003c\/strong\u003e Factory-specified bore size for this system\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003egenuine Goodman OEM\u003c\/strong\u003e piston is bored to the exact orifice size matched to the SSX140601AC's coil and capacity. Using the wrong orifice size — common with generic kits — causes overfeeding or starving of the coil, poor cooling, and possible compressor damage. With metering devices, the correct size is non-negotiable.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eProfessional recommended.\u003c\/strong\u003e Although the piston itself is simple to swap, the job requires recovering and recharging refrigerant and brazing\/sealing the line set, which must be done by an EPA-certified HVAC technician.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Direct Replacement","offer_id":63032346280307,"sku":"B1789888-GEN","price":5.95,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63048238727539,"sku":"B1789888","price":7.74,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-burner-orifice-B1789888_edb2f743-e80c-4a9e-af78-467806ebc73c.jpg?v=1782948280","url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-flow-check-piston-kit-for-ssx140601ac-b1789888","provider":"National HVAC Parts","version":"1.0","type":"link"}