{"product_id":"duravent-3-8-inner-diameter-duraflex-mortar-sleeve","title":"DuraVent 3\"-8\" Inner Diameter DuraFlex Mortar Sleeve","description":"\u003ch3 style=\"text-align: center;\"\u003eDuraVent 3\"-8\" Inner Diameter DuraFlex Mortar Sleeve\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eDuraVent 3\"-8\" Inner Diameter DuraFlex Mortar Sleeve\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e is a high-quality \u003c\/span\u003echimney liner protection accessory designed to safeguard DuraFlex flexible stainless steel chimney liners when passing through masonry walls. Engineered for professional chimney relining installations, this mortar sleeve provides a protective barrier that helps prevent damage to the liner during installation while maintaining a secure and durable venting system.\u003c\/p\u003e\n\u003cp\u003eIdeal for masonry chimney restoration, fireplace insert installations, and flexible liner applications, the DuraFlex Mortar Sleeve supports proper liner routing through wall penetrations. Compatible with 3-inch to 8-inch inner diameter DuraFlex liners, this DuraVent component helps ensure reliable chimney venting performance, safety, and long-term durability. It is an essential accessory for contractors and homeowners completing efficient, code-compliant chimney liner upgrades.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli data-section-id=\"1sgbquj\" data-start=\"0\" data-end=\"246\"\u003e\n\u003cstrong data-start=\"2\" data-end=\"60\" data-is-only-node=\"\"\u003eProtects DuraFlex Chimney Liner Through Masonry Walls:\u003c\/strong\u003e The DuraVent DuraFlex Mortar Sleeve is designed to protect flexible stainless steel chimney liners when passing through a masonry wall during chimney relining installations.\u003cspan aria-hidden=\"true\" class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"efg0e\" data-start=\"247\" data-end=\"430\"\u003e\n\u003cstrong data-start=\"249\" data-end=\"296\" data-is-only-node=\"\"\u003eDurable Chimney Liner Protection Accessory:\u003c\/strong\u003e Helps shield the DuraFlex SS liner from abrasion, pressure, and potential damage caused by direct contact with masonry materials.\u003c\/li\u003e\n\u003cli data-section-id=\"s5z54u\" data-start=\"431\" data-end=\"611\"\u003e\n\u003cstrong data-start=\"433\" data-end=\"473\" data-is-only-node=\"\"\u003eDesigned for 3-Inch DuraFlex Liners:\u003c\/strong\u003e Features a\u003cstrong\u003e \u003c\/strong\u003e3-inch diameter design for compatibility with select DuraFlex flexible chimney liner systems and venting applications.\u003c\/li\u003e\n\u003cli data-section-id=\"1ded746\" data-start=\"612\" data-end=\"753\"\u003e\n\u003cstrong data-start=\"614\" data-end=\"639\" data-is-only-node=\"\"\u003e6-Inch Sleeve Length:\u003c\/strong\u003e Provides a 6-inch long protective passage to support safe and secure liner routing through wall penetrations.\u003c\/li\u003e\n\u003cli data-section-id=\"xemxh8\" data-start=\"754\" data-end=\"951\"\u003e\n\u003cstrong data-start=\"756\" data-end=\"802\" data-is-only-node=\"\"\u003eImproves Chimney Installation Reliability:\u003c\/strong\u003e Helps maintain the integrity of the \u003cstrong data-start=\"839\" data-end=\"863\"\u003echimney liner system\u003c\/strong\u003e, supporting proper\u003cstrong\u003e \u003c\/strong\u003edraft performance, venting efficiency, and long-term durability.\u003c\/li\u003e\n\u003cli data-section-id=\"1blw9bt\" data-start=\"952\" data-end=\"1168\"\u003e\n\u003cstrong data-start=\"954\" data-end=\"994\" data-is-only-node=\"\"\u003eIdeal for Chimney Relining Projects:\u003c\/strong\u003e A professional-grade DuraVent chimney accessory for masonry chimney restoration, fireplace inserts, wood-burning appliances, and stainless steel liner installations.\u003c\/li\u003e\n\u003cli data-section-id=\"1ijhqw6\" data-start=\"1169\" data-end=\"1364\" data-is-last-node=\"\"\u003e\n\u003cstrong data-start=\"1171\" data-end=\"1217\" data-is-only-node=\"\"\u003eSupports Safe Flexible Liner Installation:\u003c\/strong\u003e Provides an added layer of protection for DuraFlex SS chimney liners, helping ensure a secure and code-compliant chimney venting solution\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable style=\"width: 520px; height: 254.719px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 128px; height: 19.5938px;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"width: 178.198px; height: 19.5938px;\"\u003eDimension\u003cbr\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 128px; height: 19.5938px;\"\u003e3DFS-MS\u003c\/td\u003e\n\u003ctd style=\"width: 178.198px; height: 19.5938px;\"\u003e3\" I.D x 6\" Length\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 128px; height: 19.5938px;\"\u003e4DFS-MS\u003c\/td\u003e\n\u003ctd style=\"width: 178.198px; height: 19.5938px;\"\u003e4\" I.D x 6\" Length\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 128px; height: 19.5938px;\"\u003e5DFS-MS\u003c\/td\u003e\n\u003ctd style=\"width: 178.198px; height: 19.5938px;\"\u003e5\" I.D x 6\" Length\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 128px; height: 19.5938px;\"\u003e55DFS-MS\u003c\/td\u003e\n\u003ctd style=\"width: 178.198px; height: 19.5938px;\"\u003e5.5\" I.D x 6\" Length\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 128px; height: 19.5938px;\"\u003e6DFS-MS\u003c\/td\u003e\n\u003ctd style=\"width: 178.198px; height: 19.5938px;\"\u003e6\" I.D x 6\" Length\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 128px; height: 19.5938px;\"\u003e7DFS-MS\u003c\/td\u003e\n\u003ctd style=\"width: 178.198px; height: 19.5938px;\"\u003e7\" I.D x 6\" Length\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 128px; height: 19.5938px;\"\u003e8DFS-MS\u003c\/td\u003e\n\u003ctd style=\"width: 178.198px; height: 19.5938px;\"\u003e8\" I.D x 6\" Length\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 128px; height: 19.5938px;\"\u003eConstruction\u003c\/td\u003e\n\u003ctd style=\"width: 372px; height: 19.5938px;\"\u003eSingle-Wall\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 128px; height: 19.5938px;\"\u003eClearance\u003c\/td\u003e\n\u003ctd style=\"width: 372px; height: 19.5938px;\"\u003e0” clearance for gas, oil, and pellet applications.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 128px; height: 19.5938px;\"\u003eClearance\u003c\/td\u003e\n\u003ctd style=\"width: 372px; height: 19.5938px;\"\u003e1” clearance to masonry for wood-burning\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 128px; height: 19.5938px;\"\u003eListings\u003c\/td\u003e\n\u003ctd style=\"width: 372px; height: 19.5938px;\"\u003eListed to UL 1777 and ULC S635 (MH45609).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 128px; height: 19.5938px;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"width: 372px; height: 19.5938px;\"\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":"3\"","offer_id":53631879938339,"sku":"3DFS-MS","price":20.0,"currency_code":"USD","in_stock":true},{"title":"4\"","offer_id":55333307875619,"sku":"4DFS-MS","price":23.0,"currency_code":"USD","in_stock":true},{"title":"5\"","offer_id":55333307908387,"sku":"5DFS-MS","price":25.0,"currency_code":"USD","in_stock":true},{"title":"55\"","offer_id":55333307941155,"sku":"55DFS-MS","price":107.0,"currency_code":"USD","in_stock":true},{"title":"6\"","offer_id":55333307973923,"sku":"6DFS-MS","price":40.0,"currency_code":"USD","in_stock":true},{"title":"7\"","offer_id":55333308006691,"sku":"7DFS-MS","price":30.0,"currency_code":"USD","in_stock":true},{"title":"8\"","offer_id":55333308039459,"sku":"8DFS-MS","price":34.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0780\/6926\/8771\/files\/DuraVent-3_-8_-Inner-Diameter-DuraFlex-Mortar-Sleeve-DuraVent-Dreamwood-Living-26046477.jpg?v=1780434795","url":"https:\/\/www.dreamwoodliving.com\/products\/duravent-3-8-inner-diameter-duraflex-mortar-sleeve","provider":"Dreamwood Living","version":"1.0","type":"link"}