{"product_id":"air-dominion-1-4-in-x-3-8-in-insulated-mini-split-line-set","title":"Air Dominion 1\/4 in. x 3\/8 in. Insulated Mini Split Line Set","description":"\u003cp\u003eAir Dominion 1\/4 in. x 3\/8 in. Insulated Mini Split Line Set is the field-installed copper line pair used to connect a mini split indoor unit to its outdoor condenser when the run is longer than the boxed kit, when the boxed line set is replaced, or when a second zone is piped. It pairs a 1\/4 in. liquid line with a 3\/8 in. suction line, both insulated, with flared ends ready for standard flare service valves. This Air Dominion quoting record is presented as a reviewed accessory configuration, with final configuration confirmed during quote review before release.\u003c\/p\u003e\u003ch3\u003eHighlights\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e1\/4 in. O.D. liquid line and 3\/8 in. O.D. suction line, sold as a matched pair\u003c\/li\u003e\n\u003cli\u003e1\/2 in. insulation on the line pair for condensation control and efficiency\u003c\/li\u003e\n\u003cli\u003eFlared ends with flare nuts fitted, ready for standard mini split service valve connections\u003c\/li\u003e\n\u003cli\u003eLength options of 15, 25, 30, 35, and 50 ft to match the routed run\u003c\/li\u003e\n\u003cli\u003eLine size matches Air Dominion 9K and 12K class connections\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecification Table\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLiquid line\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1\/4 in. O.D.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSuction line\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3\/8 in. O.D.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInsulation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1\/2 in. wall\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eConnection\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFlared, both ends\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAvailable lengths\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e15 \/ 25 \/ 30 \/ 35 \/ 50 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSold as\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMatched liquid + suction pair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eIncluded Equipment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eInsulated 1\/4 in. liquid line with flare nuts\u003c\/li\u003e\n\u003cli\u003eInsulated 3\/8 in. suction line with flare nuts\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eInstallation Notes\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eConfirm the connection sizes on the indoor and outdoor unit rating plates before ordering; line size is set by the equipment, not the run length.\u003c\/li\u003e\n\u003cli\u003eKeep the total run and vertical rise within the limits published for the connected system; long runs can require additional refrigerant charge, confirmed during quote review.\u003c\/li\u003e\n\u003cli\u003eRefrigerant-side work including flaring, evacuation, and charging verification should be completed by a qualified HVAC professional.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWarranty and Support\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003ePrepared for Air Dominion quote review. Final accessory configuration, coverage terms, and installation documents are confirmed before release.\u003c\/li\u003e\n\u003cli\u003eAccessory coverage follows the published Air Dominion accessory support terms confirmed during quote review.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhich Air Dominion systems use this line size?\u003c\/strong\u003e\u003cbr\u003eThis 1\/4 x 3\/8 pairing matches Air Dominion single-zone systems in the 9K and 12K classes using 1\/4 x 3\/8 line connections. Confirm the labeled connection sizes on your unit during quote review.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the line set insulated?\u003c\/strong\u003e\u003cbr\u003eYes. The pair carries 1\/2 in. insulation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAre the ends flared?\u003c\/strong\u003e\u003cbr\u003eYes. Both lines arrive flared with flare nuts fitted for standard mini split service valves.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat if my wall-to-pad run is between lengths?\u003c\/strong\u003e\u003cbr\u003eSelect the next length up and coil the modest excess with a wide bend radius, or note the exact routed length in the quote request for review.\u003c\/p\u003e\n\u003ch3\u003eDocuments\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0829\/7490\/0480\/files\/AD-HVAC-ACC-MS-LINESET-1438-submittal_8cb6ed15-c074-455a-bfe2-1d98fa6ce6ad.pdf?v=1783048117\" target=\"_blank\" rel=\"noopener\"\u003eProduct Submittal Summary (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0829\/7490\/0480\/files\/AD-HVAC-ACC-MS-LINESET-1438-dimensional_bc6faee3-d8ff-472c-a590-2bd7222d2d1f.pdf?v=1783048117\" target=\"_blank\" rel=\"noopener\"\u003eDimensional \u0026amp; Fit Reference (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0829\/7490\/0480\/files\/AD-HVAC-ACC-MS-LINESET-1438-install-warranty_0924a95e-5b66-4367-bdd9-67608cb618b0.pdf?v=1783048117\" target=\"_blank\" rel=\"noopener\"\u003eInstallation \u0026amp; Warranty Reference (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Air Dominion","offers":[{"title":"15 ft","offer_id":48917947187456,"sku":"AD-HVAC-ACC-MS-LINESET-1438-15","price":0.0,"currency_code":"USD","in_stock":true},{"title":"25 ft","offer_id":48917947220224,"sku":"AD-HVAC-ACC-MS-LINESET-1438-25","price":0.0,"currency_code":"USD","in_stock":true},{"title":"30 ft","offer_id":48917947252992,"sku":"AD-HVAC-ACC-MS-LINESET-1438-30","price":0.0,"currency_code":"USD","in_stock":true},{"title":"35 ft","offer_id":48917947285760,"sku":"AD-HVAC-ACC-MS-LINESET-1438-35","price":0.0,"currency_code":"USD","in_stock":true},{"title":"50 ft","offer_id":48917947318528,"sku":"AD-HVAC-ACC-MS-LINESET-1438-50","price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0829\/7490\/0480\/files\/01-hero.png?v=1783047421","url":"https:\/\/ironcinder.com\/products\/air-dominion-1-4-in-x-3-8-in-insulated-mini-split-line-set","provider":"IronCinder","version":"1.0","type":"link"}