{"product_id":"duravent-4-12-inner-diameter-duraflex-sleeve","title":"DuraVent 4\"-12\" Inner Diameter DuraFlex Sleeve","description":"\u003ch3 style=\"text-align: center;\"\u003eDuraVent 4\"-12\" Inner Diameter DuraFlex Sleeve\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eDuraVent 4\"-12\" Inner Diameter DuraFlex Sleeve\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e is a durable \u003c\/span\u003echimney liner accessory designed to provide added protection and support for DuraFlex stainless steel chimney liner systems. Engineered for use in masonry chimney relining applications, this sleeve helps protect flexible liners while maintaining proper chimney draft, airflow, and venting performance. It is compatible with DuraFlex liner solutions used for wood-burning fireplaces, inserts, non-condensing gas, and oil-fired appliances.\u003c\/p\u003e\n\u003cp\u003eBuilt to complement DuraFlex 304, DuraFlex 316, DuraFlex Pro, and DuraFlex SW chimney liners, the DuraFlex Sleeve offers reliable performance and long-term durability. Its quality construction makes it an ideal choice for fireplace venting systems, chimney restoration projects, and professional stainless steel liner installations\u003cspan\u003e requiring dependable protection and efficiency.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cdiv class=\"qMYqUG_convSearchResultHighlightRoot\"\u003e\n\u003cdiv class=\"\" data-turn-id-container=\"request-6a43b619-0ba0-83e9-8ec8-3118c3ecac8e-2\" data-is-intersecting=\"true\"\u003e\n\u003csection class=\"text-token-text-primary w-full focus:outline-none has-data-writing-block:pointer-events-none [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"request-6a43b619-0ba0-83e9-8ec8-3118c3ecac8e-2\" data-turn-id-container=\"request-6a43b619-0ba0-83e9-8ec8-3118c3ecac8e-2\" data-testid=\"conversation-turn-2050\" data-turn=\"assistant\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv data-conversation-screenshot-content=\"\" class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv data-message-author-role=\"assistant\" data-message-id=\"6de2d98e-83b8-45e1-a77e-942256a7d8fa\" dir=\"auto\" data-message-model-slug=\"gpt-5-5-mini\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" data-turn-start-message=\"true\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert wrap-break-word w-full light markdown-new-styling\"\u003e\n\u003cul data-start=\"0\" data-end=\"1217\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e\n\u003cli data-section-id=\"1n7ruu6\" data-start=\"0\" data-end=\"208\"\u003e\n\u003cstrong data-start=\"2\" data-end=\"47\" data-is-only-node=\"\"\u003eDuraFlex Chimney Liner Connection Sleeve:\u003c\/strong\u003e The DuraVent 4\"-12\" Inner Diameter DuraFlex Sleeve is designed to securely connect a DuraFlex stainless steel chimney liner to an appliance flue collar.\u003cspan aria-hidden=\"true\" class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"dj58hn\" data-start=\"209\" data-end=\"398\"\u003e\n\u003cstrong data-start=\"211\" data-end=\"250\" data-is-only-node=\"\"\u003eReliable Appliance Vent Connection:\u003c\/strong\u003e Provides a strong and dependable transition between flexible chimney liner systems and appliance outlets for improved installation performance.\u003c\/li\u003e\n\u003cli data-section-id=\"1veahfu\" data-start=\"399\" data-end=\"581\"\u003e\n\u003cstrong data-start=\"401\" data-end=\"444\" data-is-only-node=\"\"\u003eSupports Chimney Relining Applications:\u003c\/strong\u003e Ideal for masonry chimney relining projects, fireplace inserts, wood stoves, and other residential venting system installations.\u003c\/li\u003e\n\u003cli data-section-id=\"xmtg8i\" data-start=\"582\" data-end=\"743\"\u003e\n\u003cstrong data-start=\"584\" data-end=\"636\" data-is-only-node=\"\"\u003eCompatible with DuraFlex Stainless Steel Liners:\u003c\/strong\u003e Designed for use with DuraFlex 304, DuraFlex 316, DuraFlex Pro, and DuraFlex SW chimney liner systems.\u003c\/li\u003e\n\u003cli data-section-id=\"4sonha\" data-start=\"744\" data-end=\"903\"\u003e\n\u003cstrong data-start=\"746\" data-end=\"789\" data-is-only-node=\"\"\u003ePromotes Efficient Venting Performance:\u003c\/strong\u003e Helps maintain proper flue gas flow, chimney draft, and appliance venting efficiency when properly installed.\u003c\/li\u003e\n\u003cli data-section-id=\"7b2w6q\" data-start=\"904\" data-end=\"1039\"\u003e\n\u003cstrong data-start=\"906\" data-end=\"936\" data-is-only-node=\"\"\u003eDurable Chimney Accessory:\u003c\/strong\u003e Built for dependable performance and long-term use in\u003cstrong\u003e \u003c\/strong\u003estainless steel chimney liner installations.\u003c\/li\u003e\n\u003cli data-section-id=\"ozc5wu\" data-start=\"1040\" data-end=\"1217\" data-is-last-node=\"\"\u003e\n\u003cstrong data-start=\"1042\" data-end=\"1082\" data-is-only-node=\"\"\u003eProfessional-Grade Venting Solution:\u003c\/strong\u003e Provides a secure connection point for wood-burning fireplaces, inserts, non-condensing gas, and oil-fired appliance vent systems.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable style=\"width: 520px;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 128px;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"width: 178.198px;\"\u003eSize\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 128px;\"\u003e4DFS-SLV\u003c\/td\u003e\n\u003ctd style=\"width: 178.198px;\"\u003e4\" (I.D) x 4.333\" (O.D) x 4.5\" (H)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 128px;\"\u003e5DFS-SLV\u003c\/td\u003e\n\u003ctd style=\"width: 178.198px;\"\u003e5\" (I.D) x 5.333\" (O.D) x 4.5\" (H)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 128px;\"\u003e55DFS-SLV\u003c\/td\u003e\n\u003ctd style=\"width: 178.198px;\"\u003e5.5\" (I.D) x 5.75\" (O.D) x 4.5\" (H)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 128px;\"\u003e6DFS-SLV\u003c\/td\u003e\n\u003ctd style=\"width: 178.198px;\"\u003e6\" (I.D) x 6.333\" (O.D) x 4.5\" (H)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 128px;\"\u003e7DFS-SLV\u003c\/td\u003e\n\u003ctd style=\"width: 178.198px;\"\u003e7\" (I.D) x 7.5\" (O.D) x 4.5\" (H)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 128px;\"\u003e8DFS-SLV\u003c\/td\u003e\n\u003ctd style=\"width: 178.198px;\"\u003e8\" (I.D) x 8.3\" (O.D) x 4.5\" (H)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 128px;\"\u003e10DFS-SLV\u003c\/td\u003e\n\u003ctd style=\"width: 178.198px;\"\u003e10\" (I.D) x 10.3\" (O.D) x 4.5\" (H)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 128px;\"\u003e12DFS-SLV\u003c\/td\u003e\n\u003ctd style=\"width: 178.198px;\"\u003e12\" (I.D) x 12.25\" (O.D) x 4.5\" (H)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 128px;\"\u003eConstruction\u003c\/td\u003e\n\u003ctd style=\"width: 372px;\"\u003eSingle-Wall\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 128px;\"\u003eClearance\u003c\/td\u003e\n\u003ctd style=\"width: 372px;\"\u003e0” clearance for gas, oil, and pellet applications.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 128px;\"\u003eClearance\u003c\/td\u003e\n\u003ctd style=\"width: 372px;\"\u003e1” clearance to masonry for wood-burning\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 128px;\"\u003eListings\u003c\/td\u003e\n\u003ctd style=\"width: 372px;\"\u003eListed to UL 1777 and ULC S635 (MH45609).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 128px;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"width: 372px;\"\u003eLimited lifetime warranty\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eDownloads\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0100\/7917\/4734\/files\/DuraFlex_Catalog.pdf?v=1652650777\" target=\"_blank\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eProduct Catalog\u003c\/strong\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0100\/7917\/4734\/files\/DuraFlex_Installation_Manual.pdf?v=1652650795\" target=\"_blank\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eInstruction Manual\u003c\/strong\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"DuraVent","offers":[{"title":"4\"","offer_id":53631887016227,"sku":"4DFS-SLV","price":96.0,"currency_code":"USD","in_stock":true},{"title":"5\"","offer_id":55333801689379,"sku":"5DFS-SLV","price":97.0,"currency_code":"USD","in_stock":true},{"title":"5.5\"","offer_id":55333801722147,"sku":"55DFS-SLV","price":100.0,"currency_code":"USD","in_stock":true},{"title":"6\"","offer_id":55333801754915,"sku":"6DFS-SLV","price":102.0,"currency_code":"USD","in_stock":true},{"title":"7\"","offer_id":55333801787683,"sku":"7DFS-SLV","price":107.0,"currency_code":"USD","in_stock":true},{"title":"8\"","offer_id":55333801820451,"sku":"8DFS-SLV","price":111.0,"currency_code":"USD","in_stock":true},{"title":"10\"","offer_id":55333801853219,"sku":"10DFS-SLV","price":141.0,"currency_code":"USD","in_stock":true},{"title":"12\"","offer_id":55333801885987,"sku":"12DFS-SLV","price":160.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0780\/6926\/8771\/files\/DuraVent-4_-12_-Inner-Diameter-DuraFlex-Sleeve-DuraVent-Dreamwood-Living-26045614.jpg?v=1780434790","url":"https:\/\/www.dreamwoodliving.com\/products\/duravent-4-12-inner-diameter-duraflex-sleeve","provider":"Dreamwood Living","version":"1.0","type":"link"}