{"product_id":"lennox-thermal-expansion-valve-txv-with-3-8-x-1-2-sweat-connections-and-an-external-equalizer","title":"Lennox thermal expansion valve (TXV) with 3\/8\" x 1\/2\" sweat connections and an external equalizer","description":"\u003cp class=\"Paragraph-kKnbIo\" dir=\"auto\"\u003e\u003cspan\u003eThe \u003c\/span\u003e\u003cstrong class=\"font-semibold\"\u003e\u003cspan\u003eLennox 79J75\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e is a genuine OEM \u003c\/span\u003e\u003cstrong class=\"font-semibold\"\u003e\u003cspan\u003ethermal expansion valve (TXV)\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e designed for select Lennox HVAC systems. It features \u003c\/span\u003e\u003cstrong class=\"font-semibold\"\u003e\u003cspan\u003e3\/8-inch x 1\/2-inch sweat connections\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e and an \u003c\/span\u003e\u003cstrong class=\"font-semibold\"\u003e\u003cspan\u003eexternally equalized\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e configuration for precise refrigerant metering.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"Paragraph-kKnbIo\" dir=\"auto\"\u003e\u003cspan\u003eThe TXV regulates refrigerant flow into the evaporator based on system operating conditions, helping maintain proper superheat and efficient heat transfer. The 79J75 is documented in Lennox equipment applications including packaged units, commercial equipment, central air conditioners, and heat pumps. \u003c\/span\u003e\u003cspan class=\"contents\" data-chatgpt-copy-reference=\"1\" data-markdown-copy=\"contents\"\u003e\u003cspan data-state=\"closed\" class=\"contents\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 class=\"Heading-Ro3lZr\" dir=\"auto\"\u003e\u003cspan\u003eKey Features \u0026amp; Function\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul dir=\"auto\" class=\"List-kOVW5V UnorderedList-nqKD7g\"\u003e\n\u003cli class=\"ListItem-ncLgmg\"\u003e\n\u003cspan\u003eGenuine \u003c\/span\u003e\u003cstrong class=\"font-semibold\"\u003e\u003cspan\u003eLennox OEM\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e component\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"ListItem-ncLgmg\"\u003e\u003cstrong class=\"font-semibold\"\u003e\u003cspan\u003ePart \/ Cat #: 79J75\u003c\/span\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli class=\"ListItem-ncLgmg\"\u003e\n\u003cspan\u003eThermal Expansion Valve (\u003c\/span\u003e\u003cstrong class=\"font-semibold\"\u003e\u003cspan\u003eTXV\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e)\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"ListItem-ncLgmg\"\u003e\u003cstrong class=\"font-semibold\"\u003e\u003cspan\u003e3\/8\" x 1\/2\" connections\u003c\/span\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli class=\"ListItem-ncLgmg\"\u003e\u003cstrong class=\"font-semibold\"\u003e\u003cspan\u003eSweat connection\u003c\/span\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli class=\"ListItem-ncLgmg\"\u003e\u003cstrong class=\"font-semibold\"\u003e\u003cspan\u003eExternally equalized\u003c\/span\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli class=\"ListItem-ncLgmg\"\u003e\u003cspan\u003eControls refrigerant flow into the evaporator\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"ListItem-ncLgmg\"\u003e\u003cspan\u003eHelps maintain proper evaporator superheat\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"ListItem-ncLgmg\"\u003e\u003cspan\u003eUsed in select Lennox HVAC equipment\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"ListItem-ncLgmg\"\u003e\u003cspan\u003eSuitable for applicable air conditioning and heat pump systems\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 class=\"Heading-Ro3lZr\" dir=\"auto\"\u003e\u003cspan\u003eProduct Details \u0026amp; Specifications\u003c\/span\u003e\u003c\/h2\u003e\n\u003cdiv class=\"group\/app-widget pointer-coarse:pt-11 [@media(hover:none)]:pt-11 TableContainer-UfIOz_\" data-markdown-table=\"true\" data-wide-block=\"\" tabindex=\"-1\"\u003e\n\u003cdiv class=\"TableScroller-ZhMTLB\"\u003e\n\u003cdiv class=\"TableWrapper-i1mUIE\"\u003e\n\u003ctable class=\"Table-LqdUhs\" dir=\"auto\"\u003e\n\u003cthead\u003e\n\u003ctr class=\"TableRow-ENsaGm\"\u003e\n\u003cth class=\"TableHeaderCell-esYSpn SingleChildTableCell-Sv7jTC\" dir=\"auto\" data-col-size=\"sm\"\u003e\u003cspan\u003eSpecification\u003c\/span\u003e\u003c\/th\u003e\n\u003cth class=\"TableHeaderCell-esYSpn SingleChildTableCell-Sv7jTC\" dir=\"auto\" data-col-size=\"sm\"\u003e\u003cspan\u003eDetails\u003c\/span\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody class=\"TableBody-A5sMNL\"\u003e\n\u003ctr class=\"TableRow-ENsaGm\"\u003e\n\u003ctd class=\"TableCell-WcsygL SingleChildTableCell-Sv7jTC\" dir=\"auto\" data-col-size=\"sm\"\u003e\u003cstrong class=\"font-semibold\"\u003e\u003cspan\u003eBrand\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"TableCell-WcsygL SingleChildTableCell-Sv7jTC\" dir=\"auto\" data-col-size=\"sm\"\u003e\u003cspan\u003eLennox\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"TableRow-ENsaGm\"\u003e\n\u003ctd class=\"TableCell-WcsygL SingleChildTableCell-Sv7jTC\" dir=\"auto\" data-col-size=\"sm\"\u003e\u003cstrong class=\"font-semibold\"\u003e\u003cspan\u003ePart Number\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"TableCell-WcsygL SingleChildTableCell-Sv7jTC\" dir=\"auto\" data-col-size=\"sm\"\u003e\u003cstrong class=\"font-semibold\"\u003e\u003cspan\u003e79J75\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"TableRow-ENsaGm\"\u003e\n\u003ctd class=\"TableCell-WcsygL SingleChildTableCell-Sv7jTC\" dir=\"auto\" data-col-size=\"sm\"\u003e\u003cstrong class=\"font-semibold\"\u003e\u003cspan\u003eProduct Type\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"TableCell-WcsygL SingleChildTableCell-Sv7jTC\" dir=\"auto\" data-col-size=\"sm\"\u003e\u003cspan\u003eThermal Expansion Valve\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"TableRow-ENsaGm\"\u003e\n\u003ctd class=\"TableCell-WcsygL SingleChildTableCell-Sv7jTC\" dir=\"auto\" data-col-size=\"sm\"\u003e\u003cstrong class=\"font-semibold\"\u003e\u003cspan\u003eCommon Name\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"TableCell-WcsygL SingleChildTableCell-Sv7jTC\" dir=\"auto\" data-col-size=\"sm\"\u003e\u003cspan\u003eTXV\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"TableRow-ENsaGm\"\u003e\n\u003ctd class=\"TableCell-WcsygL SingleChildTableCell-Sv7jTC\" dir=\"auto\" data-col-size=\"sm\"\u003e\u003cstrong class=\"font-semibold\"\u003e\u003cspan\u003eConnection Size\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"TableCell-WcsygL SingleChildTableCell-Sv7jTC\" dir=\"auto\" data-col-size=\"sm\"\u003e\u003cstrong class=\"font-semibold\"\u003e\u003cspan\u003e3\/8\" x 1\/2\"\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"TableRow-ENsaGm\"\u003e\n\u003ctd class=\"TableCell-WcsygL SingleChildTableCell-Sv7jTC\" dir=\"auto\" data-col-size=\"sm\"\u003e\u003cstrong class=\"font-semibold\"\u003e\u003cspan\u003eConnection Type\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"TableCell-WcsygL SingleChildTableCell-Sv7jTC\" dir=\"auto\" data-col-size=\"sm\"\u003e\u003cstrong class=\"font-semibold\"\u003e\u003cspan\u003eSweat\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"TableRow-ENsaGm\"\u003e\n\u003ctd class=\"TableCell-WcsygL SingleChildTableCell-Sv7jTC\" dir=\"auto\" data-col-size=\"sm\"\u003e\u003cstrong class=\"font-semibold\"\u003e\u003cspan\u003eEqualizer\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"TableCell-WcsygL SingleChildTableCell-Sv7jTC\" dir=\"auto\" data-col-size=\"sm\"\u003e\u003cstrong class=\"font-semibold\"\u003e\u003cspan\u003eExternal\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"TableRow-ENsaGm\"\u003e\n\u003ctd class=\"TableCell-WcsygL SingleChildTableCell-Sv7jTC\" dir=\"auto\" data-col-size=\"sm\"\u003e\u003cstrong class=\"font-semibold\"\u003e\u003cspan\u003eFunction\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"TableCell-WcsygL SingleChildTableCell-Sv7jTC\" dir=\"auto\" data-col-size=\"sm\"\u003e\u003cspan\u003eRefrigerant Metering\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"TableRow-ENsaGm\"\u003e\n\u003ctd class=\"TableCell-WcsygL SingleChildTableCell-Sv7jTC\" dir=\"auto\" data-col-size=\"sm\"\u003e\u003cstrong class=\"font-semibold\"\u003e\u003cspan\u003eApplication\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"TableCell-WcsygL SingleChildTableCell-Sv7jTC\" dir=\"auto\" data-col-size=\"sm\"\u003e\u003cspan\u003eHVAC Refrigeration Circuit\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"TableRow-ENsaGm\"\u003e\n\u003ctd class=\"TableCell-WcsygL SingleChildTableCell-Sv7jTC\" dir=\"auto\" data-col-size=\"sm\"\u003e\u003cstrong class=\"font-semibold\"\u003e\u003cspan\u003eOEM Component\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"TableCell-WcsygL SingleChildTableCell-Sv7jTC\" dir=\"auto\" data-col-size=\"sm\"\u003e\u003cspan\u003eYes\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"absolute end-0 top-0 z-50 flex w-fit select-none items-center gap-1 rounded-full bg-surface p-0.5 text-tertiary pointer-events-none opacity-0 group-hover\/app-widget:pointer-events-auto group-hover\/app-widget:opacity-100 focus-within:pointer-events-auto focus-within:opacity-100 data-[visible=true]:pointer-events-auto data-[visible=true]:opacity-100 has-data-[state=open]:pointer-events-auto has-data-[state=open]:opacity-100 pointer-coarse:pointer-events-auto pointer-coarse:opacity-100 [@media(hover:none)]:pointer-events-auto [@media(hover:none)]:opacity-100\" data-block-actions=\"true\" data-markdown-copy=\"exclude\"\u003e\n\u003cspan data-state=\"closed\" class=\"contents\"\u003e\u003cbutton type=\"button\" class=\"no-drag cursor-interaction items-center select-none disabled:cursor-default aria-disabled:cursor-default focus:outline-hidden disabled:opacity-40 aria-disabled:opacity-40 focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-0 whitespace-nowrap flex border gap-1 rounded-full text-tertiary not-disabled:not-aria-disabled:hover:bg-primary-ghost-hover not-disabled:not-aria-disabled:hover:text-default data-[state=open]:bg-primary-ghost-hover border-transparent size-9 justify-center border-0 p-0\"\u003e\u003cspan class=\"LeadingSource-d79mNZ\"\u003e\u003c\/span\u003e\u003c\/button\u003e\u003c\/span\u003e\u003cspan data-state=\"closed\" class=\"contents\"\u003e\u003cbutton type=\"button\" class=\"no-drag cursor-interaction items-center select-none disabled:cursor-default aria-disabled:cursor-default focus:outline-hidden disabled:opacity-40 aria-disabled:opacity-40 focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-0 whitespace-nowrap flex border gap-1 rounded-full text-tertiary not-disabled:not-aria-disabled:hover:bg-primary-ghost-hover not-disabled:not-aria-disabled:hover:text-default data-[state=open]:bg-primary-ghost-hover border-transparent size-9 justify-center border-0 p-0\"\u003e\u003cspan class=\"LeadingSource-d79mNZ\"\u003e\u003csvg class=\"Icon-X4VkKC\" height=\"20\" viewbox=\"0 0 20 20\" width=\"20\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003c\/svg\u003e\u003c\/span\u003e\u003c\/button\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"Paragraph-kKnbIo\" dir=\"auto\"\u003e\u003cspan\u003eThe connection dimensions and TXV configuration are consistently identified across current parts sources. \u003c\/span\u003e\u003cspan class=\"contents\" data-chatgpt-copy-reference=\"2\" data-markdown-copy=\"contents\"\u003e\u003cspan data-state=\"closed\" class=\"contents\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 class=\"Heading-Ro3lZr\" dir=\"auto\"\u003e\u003cspan\u003e🛠️ HVAC Depot Pro Tip\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"Paragraph-kKnbIo\" dir=\"auto\"\u003e\u003cspan\u003eDo not select the \u003c\/span\u003e\u003cstrong class=\"font-semibold\"\u003e\u003cspan\u003e79J75\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e simply because another TXV has the same tubing sizes.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"Paragraph-kKnbIo\" dir=\"auto\"\u003e\u003cspan\u003eBefore ordering, verify:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul dir=\"auto\" class=\"List-kOVW5V UnorderedList-nqKD7g\"\u003e\n\u003cli class=\"ListItem-ncLgmg\"\u003e\u003cstrong class=\"font-semibold\"\u003e\u003cspan\u003ePart # 79J75\u003c\/span\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli class=\"ListItem-ncLgmg\"\u003e\u003cspan\u003eRefrigerant used by the equipment\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"ListItem-ncLgmg\"\u003e\u003cspan\u003eIndoor and outdoor equipment model\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"ListItem-ncLgmg\"\u003e\u003cspan\u003eRequired TXV capacity\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"ListItem-ncLgmg\"\u003e\u003cstrong class=\"font-semibold\"\u003e\u003cspan\u003e3\/8\" x 1\/2\" sweat connections\u003c\/span\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli class=\"ListItem-ncLgmg\"\u003e\u003cspan\u003eExternal equalizer requirement\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"ListItem-ncLgmg\"\u003e\u003cspan\u003eDistributor configuration\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"ListItem-ncLgmg\"\u003e\u003cspan\u003eManufacturer charging specifications\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"Paragraph-kKnbIo\" dir=\"auto\"\u003e\u003cspan\u003eThis is especially important because the \u003c\/span\u003e\u003cstrong class=\"font-semibold\"\u003e\u003cspan\u003e79J75 appears in multiple Lennox equipment families and capacities\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, so the equipment model should determine compatibility rather than tubing size alone.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 class=\"Heading-Ro3lZr\" dir=\"auto\"\u003e\u003cspan\u003eEquipment \/ Model Compatibility\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"Paragraph-kKnbIo\" dir=\"auto\"\u003e\u003cspan\u003eDocumented applications for the \u003c\/span\u003e\u003cstrong class=\"font-semibold\"\u003e\u003cspan\u003eLennox 79J75\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e include select:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul dir=\"auto\" class=\"List-kOVW5V UnorderedList-nqKD7g\"\u003e\n\u003cli class=\"ListItem-ncLgmg\"\u003e\n\u003cstrong class=\"font-semibold\"\u003e\u003cspan\u003eCHA16 Series\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e packaged units\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"ListItem-ncLgmg\"\u003e\n\u003cstrong class=\"font-semibold\"\u003e\u003cspan\u003eLGA Series\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e equipment\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"ListItem-ncLgmg\"\u003e\n\u003cstrong class=\"font-semibold\"\u003e\u003cspan\u003eLGC Series\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e equipment\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"ListItem-ncLgmg\"\u003e\n\u003cstrong class=\"font-semibold\"\u003e\u003cspan\u003eLSA Series\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e central air conditioners\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"ListItem-ncLgmg\"\u003e\n\u003cstrong class=\"font-semibold\"\u003e\u003cspan\u003eLHA Series\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e heat pumps\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"ListItem-ncLgmg\"\u003e\u003cspan\u003eGCS equipment\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"ListItem-ncLgmg\"\u003e\n\u003cspan\u003eOther Lennox equipment specifically calling for \u003c\/span\u003e\u003cstrong class=\"font-semibold\"\u003e\u003cspan\u003e79J75\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"Paragraph-kKnbIo\" dir=\"auto\"\u003e\u003cspan\u003eExamples documented in parts information include \u003c\/span\u003e\u003cstrong class=\"font-semibold\"\u003e\u003cspan\u003eCHA16-072-1, CHA16-120-1, CHA16-180-1, CHA16-240-1, LSA090P-1, and LHA120H-1\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e. \u003c\/span\u003e\u003cspan class=\"contents\" data-chatgpt-copy-reference=\"3\" data-markdown-copy=\"contents\"\u003e\u003cspan data-state=\"closed\" class=\"contents\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"Paragraph-kKnbIo\" dir=\"auto\"\u003e\u003cspan\u003eAlways verify the complete equipment model and serial number before ordering.\u003c\/span\u003e\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":53973527789931,"sku":"66255117082","price":180.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0922\/9683\/9531\/files\/79J75_cbb01bea-cb8d-4865-ad3b-842c23afad50.jpg?v=1790889196","url":"https:\/\/tophvacparts.com\/products\/lennox-thermal-expansion-valve-txv-with-3-8-x-1-2-sweat-connections-and-an-external-equalizer","provider":"HVAC Parts and Equipment Depot Open To Homeowners and Contractors","version":"1.0","type":"link"}