DuraVent 25' Flex Pipe DuraFlex Pro Stainless Steel Length
The DuraVent 25' Flex Pipe DuraFlex Pro Stainless Steel Length is a premium flexible chimney liner designed for superior strength, flexibility, and dependable masonry chimney relining. Made with highly corrosion-resistant 316 stainless steel, DuraFlex Pro features 20% more stainless steel per foot compared to many traditional liners, providing exceptional durability and long-lasting performance. Its extreme flexibility allows for smooth, problem-free installations where multiple chimney offsets are present, making it an ideal solution for wood 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.
Engineered for professional chimney restoration and venting upgrades, the DuraFlex Pro flexible liner helps maintain efficient flue gas flow, chimney draft, and appliance performance. Its durable construction protects against heat, moisture, and corrosive combustion byproducts while extending chimney system life. This 25-foot stainless steel chimney pipe liner provides a reliable, code-compliant solution for residential and commercial chimney relining applications, backed by trusted DuraVent quality and performance
Features
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DuraVent DuraFlex Pro 25' Stainless Steel Chimney Liner: Premium 25-foot flexible chimney pipe liner designed for professional masonry chimney relining, fireplace inserts, and venting upgrades.
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High-Strength 316 Stainless Steel Construction: Built with durable 316 stainless steel alloy for superior strength, flexibility, and long-lasting corrosion-resistant chimney liner performance.
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Enhanced Corrosion Resistance for Coal Applications: The 316 alloy stainless steel design provides additional corrosion protection when burning coal or sulfur-containing oils, helping extend liner durability.
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Ideal for Multiple Offset Chimney Installations: DuraFlex Pro offers exceptional flexibility, making it the best choice for chimney systems with multiple offsets and challenging installation paths.
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Compatible with Multiple Fuel Types: Designed for use with solid fuel appliances, non-condensing gas appliances, and oil-fired heating systems.
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Flexible Design for Easy Installation: Allows smooth routing through existing chimneys while supporting efficient chimney liner replacement and restoration projects.
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Improves Venting Efficiency: Helps maintain proper flue gas flow, chimney draft, and heating appliance performance for safer operation.
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Professional Chimney Relining Solution: Ideal for wood stove chimney liners, fireplace insert liners, stainless steel vent systems, and masonry chimney restoration.
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UL Listed Chimney Liner System: Meets UL 1777 and ULC S635 standards for dependable, safe, and code-compliant chimney venting installations.
Specifications
| Model |
Size |
Flex Length |
| 3DFPRO-25 |
3" I.D |
25 ft. |
| 4DFPRO-25 |
4" I.D |
25 ft. |
| 5DFPRO-25 |
5" I.D |
25 ft. |
| 55DFPRO-25 |
5.5" I.D |
25 ft. |
| 6DFPRO-25 |
6" I.D |
25 ft. |
| 7DFPRO-25 |
7" I.D |
25 ft. |
| 8DFPRO-25 |
8" I.D |
25 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 |
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