DuraVent 15' Flex Pipe Length DuraFlex Pro Stainless Steel Basic Kit
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The DuraVent 15' Flex Pipe Length DuraFlex Pro Stainless Steel Basic Kit is a premium flexible chimney liner system designed for superior strength, flexibility, and dependable 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, providing enhanced durability and performance. Its extreme flexibility allows for easy installation in chimneys with multiple offsets, making it ideal for wood stoves, fireplace inserts, and solid-fuel appliances. The kit is available in 3-inch through 12-inch diameters and is listed to UL 1777 and ULC S635 standards.
Built for professional chimney restoration and venting upgrades, the DuraFlex Pro stainless steel liner helps improve flue gas flow, chimney draft, and appliance efficiency while protecting against heat, moisture, and corrosive combustion byproducts. This 15-foot chimney liner kit provides a reliable solution for wood-burning, non-condensing gas, and oil-fired appliance applications. With DuraVent’s trusted engineering, this flexible stainless steel chimney liner delivers long-lasting safety, easy installation, and code-compliant venting performance.
| Model | Size | Flex Length |
| 3DFPRO-15K | 3" I.D | 15 ft. |
| 4DFPRO-15K | 4" I.D | 15 ft. |
| 5DFPRO-15K | 5" I.D | 15 ft. |
| 55DFPRO-15K | 5.5" I.D | 15 ft. |
| 6DFPRO-15K | 6" I.D | 15 ft. |
| 7DFPRO-15K | 7" I.D | 15 ft. |
| 8DFPRO-15K | 8" I.D | 15 ft. |
| Materials | 316 Stainless Steel | |
| Construction | Single-Wall | |
| Clearance | 0” clearance for gas, oil, and pellet applications. | |
| Clearance | 1” clearance to masonry for wood-burning | |
| Listings | Listed to UL 1777 and ULC S635 (MH45609). | |
| Warranty | Limited lifetime warranty | |