{"product_id":"duravent-20-flex-pipe-duraflex-pro-stainless-steel-length","title":"DuraVent 20' Flex Pipe DuraFlex Pro Stainless Steel Length","description":"\u003ch3 style=\"text-align: center;\"\u003eDuraVent 20' Flex Pipe DuraFlex Pro Stainless Steel Length\u003c\/h3\u003e\n\u003cdiv class=\"\" data-turn-id-container=\"request-6a43b619-0ba0-83e9-8ec8-3118c3ecac8e-18\" 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-18\" data-turn-id-container=\"request-6a43b619-0ba0-83e9-8ec8-3118c3ecac8e-18\" data-testid=\"conversation-turn-1918\" data-turn=\"assistant\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto [--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=\"77b92a4c-2ad6-4b0e-9a79-11f940b119a9\" 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\"\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\u003cp data-start=\"0\" data-end=\"719\"\u003eThe \u003cstrong data-start=\"4\" data-end=\"66\"\u003eDuraVent 20' Flex Pipe DuraFlex Pro Stainless Steel Length\u003c\/strong\u003e is a premium flexible chimney liner designed for superior strength, flexibility, and reliable masonry chimney relining. Manufactured with highly corrosion-resistant 316 stainless steel, DuraFlex Pro features 20% more stainless steel per foot compared to many standard liners, delivering enhanced durability and performance. Its extreme flexibility allows smooth installation through chimneys with multiple offsets, making it ideal for wood-burning stoves, fireplace inserts, and solid-fuel appliances. Available in 3-inch through 12-inch diameters, this stainless steel chimney liner is listed to UL 1777 and ULC S635 standards.\u003c\/p\u003e\n\u003cp data-start=\"721\" data-end=\"1264\" data-is-last-node=\"\" data-is-only-node=\"\"\u003eBuilt for professional chimney restoration and venting upgrades, the DuraFlex Pro flexible liner supports efficient flue gas flow, proper chimney draft, and improved appliance performance. Its durable construction helps protect chimney systems from heat, moisture, and corrosive combustion byproducts. This 20-foot stainless steel chimney pipe liner is a dependable choice for residential and commercial applications requiring safe, long-lasting, and code-compliant chimney venting solutions backed by trusted DuraVent quality.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3 class=\"z-0 flex min-h-[46px] justify-start\"\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-section-id=\"eks41o\" data-start=\"0\" data-end=\"223\"\u003e\n\u003cstrong data-start=\"2\" data-end=\"58\" data-is-only-node=\"\"\u003ePremium DuraVent DuraFlex Pro Stainless Steel Liner:\u003c\/strong\u003e The 20' Flex Pipe DuraFlex Pro is a high-performance flexible chimney liner designed for professional masonry chimney relining and venting applications.\u003cspan aria-hidden=\"true\" class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"n6j14d\" data-start=\"224\" data-end=\"442\"\u003e\n\u003cstrong data-start=\"226\" data-end=\"271\" data-is-only-node=\"\"\u003eDurable 316 Stainless Steel Construction:\u003c\/strong\u003e Manufactured with corrosion-resistant 316 stainless steel alloy to provide superior strength, durability, and extended service life in demanding chimney environments.\u003c\/li\u003e\n\u003cli data-section-id=\"cy4aml\" data-start=\"443\" data-end=\"644\"\u003e\n\u003cstrong data-start=\"445\" data-end=\"489\" data-is-only-node=\"\"\u003eIdeal for Multiple Offset Installations:\u003c\/strong\u003e Engineered with exceptional flexibility, making it the\u003cstrong\u003e \u003c\/strong\u003ebest choice for chimney installations with multiple offsets and complex venting configurations.\u003c\/li\u003e\n\u003cli data-section-id=\"11byx36\" data-start=\"645\" data-end=\"805\"\u003e\n\u003cstrong data-start=\"647\" data-end=\"694\" data-is-only-node=\"\"\u003eCompatible with Multiple Fuel Applications:\u003c\/strong\u003e Designed for use with solid fuel appliances, non-condensing gas appliances, and oil-fired heating systems.\u003c\/li\u003e\n\u003cli data-section-id=\"11mxl0g\" data-start=\"806\" data-end=\"1024\"\u003e\n\u003cstrong data-start=\"808\" data-end=\"859\" data-is-only-node=\"\"\u003eEnhanced Corrosion Resistance for Coal Burning:\u003c\/strong\u003e The\u003cstrong\u003e \u003c\/strong\u003e316 stainless steel alloy provides additional protection when burning coal or sulfur-containing oils, helping prevent corrosion and liner deterioration.\u003c\/li\u003e\n\u003cli data-section-id=\"1bosvqv\" data-start=\"1025\" data-end=\"1180\"\u003e\n\u003cstrong data-start=\"1027\" data-end=\"1076\" data-is-only-node=\"\"\u003eImproves Chimney Draft \u0026amp; Venting Performance:\u003c\/strong\u003e Supports efficient flue gas flow, reliable chimney draft, and improved heating appliance operation.\u003c\/li\u003e\n\u003cli data-section-id=\"uodb01\" data-start=\"1181\" data-end=\"1375\"\u003e\n\u003cstrong data-start=\"1183\" data-end=\"1231\" data-is-only-node=\"\"\u003eFlexible Chimney Pipe for Easy Installation:\u003c\/strong\u003e Allows easier routing through existing chimney structures while reducing installation challenges during\u003cstrong\u003e \u003c\/strong\u003echimney liner replacement projects.\u003c\/li\u003e\n\u003cli data-section-id=\"16d6qcz\" data-start=\"1376\" data-end=\"1550\"\u003e\n\u003cstrong data-start=\"1378\" data-end=\"1421\" data-is-only-node=\"\"\u003eProfessional Chimney Relining Solution:\u003c\/strong\u003e Ideal for wood stove chimney liners, fireplace insert installations, chimney restoration, and stainless steel vent upgrades.\u003c\/li\u003e\n\u003cli data-section-id=\"18c6duy\" data-start=\"1551\" data-end=\"1704\"\u003e\n\u003cstrong data-start=\"1553\" data-end=\"1597\" data-is-only-node=\"\"\u003eUL Listed Stainless Steel Chimney Liner:\u003c\/strong\u003e Meets\u003cstrong\u003e \u003c\/strong\u003eUL 1777 and ULC S635 standards for safe, reliable, and code-compliant chimney liner systems.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"\" data-turn-id-container=\"49dc0782-1162-44d4-815b-5cad22b963a4\" 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-(--sticky-padding-top)\" dir=\"auto\" data-turn-id=\"49dc0782-1162-44d4-815b-5cad22b963a4\" data-turn-id-container=\"49dc0782-1162-44d4-815b-5cad22b963a4\" data-testid=\"conversation-turn-1919\" data-turn=\"user\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pt-12 [--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\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv data-message-author-role=\"user\" data-message-id=\"49dc0782-1162-44d4-815b-5cad22b963a4\" dir=\"auto\" 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\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden items-end rtl:items-start\"\u003e\n\u003cdiv class=\"flex flex-col w-fit max-w-(--user-chat-width,70%) items-start self-end rtl:items-end rtl:self-start\"\u003e\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\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\u003ctd style=\"width: 193.802px;\"\u003eFlex Length\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 128px;\"\u003e3DFPRO-20\u003c\/td\u003e\n\u003ctd style=\"width: 178.198px;\"\u003e3\" I.D\u003c\/td\u003e\n\u003ctd style=\"width: 193.802px;\"\u003e20 ft.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 128px;\"\u003e4DFPRO-20\u003c\/td\u003e\n\u003ctd style=\"width: 178.198px;\"\u003e4\" I.D\u003c\/td\u003e\n\u003ctd style=\"width: 193.802px;\"\u003e20 ft.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 128px;\"\u003e5DFPRO-20\u003c\/td\u003e\n\u003ctd style=\"width: 178.198px;\"\u003e5\" I.D\u003c\/td\u003e\n\u003ctd style=\"width: 193.802px;\"\u003e20 ft.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 128px;\"\u003e55DFPRO-20\u003c\/td\u003e\n\u003ctd style=\"width: 178.198px;\"\u003e5.5\" I.D\u003c\/td\u003e\n\u003ctd style=\"width: 193.802px;\"\u003e20 ft.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 128px;\"\u003e6DFPRO-20\u003c\/td\u003e\n\u003ctd style=\"width: 178.198px;\"\u003e6\" I.D\u003c\/td\u003e\n\u003ctd style=\"width: 193.802px;\"\u003e20 ft.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 128px;\"\u003e7DFPRO-20\u003c\/td\u003e\n\u003ctd style=\"width: 178.198px;\"\u003e7\" I.D\u003c\/td\u003e\n\u003ctd style=\"width: 193.802px;\"\u003e20 ft.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 128px;\"\u003e8DFPRO-20\u003c\/td\u003e\n\u003ctd style=\"width: 178.198px;\"\u003e8\" I.D\u003c\/td\u003e\n\u003ctd style=\"width: 193.802px;\"\u003e20 ft.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 128px;\"\u003eMaterials\u003c\/td\u003e\n\u003ctd style=\"width: 372px;\" colspan=\"2\"\u003e316 stainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 128px;\"\u003eConstruction\u003c\/td\u003e\n\u003ctd style=\"width: 372px;\" colspan=\"2\"\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;\" colspan=\"2\"\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;\" colspan=\"2\"\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;\" colspan=\"2\"\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;\" colspan=\"2\"\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\u003eDownload Product 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\u003eDownload Instruction Manual\u003c\/strong\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"DuraVent","offers":[{"title":"20 \/ 3 X 20'","offer_id":53631907201315,"sku":"3DFPRO-20","price":632.0,"currency_code":"USD","in_stock":true},{"title":"20 \/ 4 X 20'","offer_id":55332102242595,"sku":"4DFPRO-20","price":700.0,"currency_code":"USD","in_stock":true},{"title":"20 \/ 5 X 20'","offer_id":55332102275363,"sku":"5DFPRO-20","price":895.0,"currency_code":"USD","in_stock":true},{"title":"20 \/ 5.5 X 20'","offer_id":55332102308131,"sku":"5.5DFPRO-20","price":974.0,"currency_code":"USD","in_stock":true},{"title":"20 \/ 6 X 20'","offer_id":55332102340899,"sku":"6DFPRO-20","price":1057.0,"currency_code":"USD","in_stock":true},{"title":"20 \/ 7 X 20'","offer_id":55332102373667,"sku":"7DFPRO-20","price":1208.0,"currency_code":"USD","in_stock":true},{"title":"20 \/ 8 X 20'","offer_id":55332102406435,"sku":"8DFPRO-20","price":1304.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0780\/6926\/8771\/files\/DuraVent-20_-Flex-Pipe-DuraFlex-Pro-Stainless-Steel-Length-DuraVent-Dreamwood-Living-26053186.jpg?v=1780434829","url":"https:\/\/www.dreamwoodliving.com\/products\/duravent-20-flex-pipe-duraflex-pro-stainless-steel-length","provider":"Dreamwood Living","version":"1.0","type":"link"}