DuraVent 20' Flex Pipe Length DuraFlex 304 Stainless Steel
The DuraVent 20' DuraFlex 304 Stainless Steel Flex Pipe is a premium flexible chimney liner designed for dependable masonry chimney relining in residential and commercial heating systems. Manufactured from durable 304 stainless steel, this 20-foot chimney liner is ideal for wood-burning fireplaces, wood stoves, non-condensing gas appliances, and oil-fired heating equipment with minimal chimney offsets. Its lightweight, flexible construction simplifies installation while providing excellent corrosion resistance and efficient flue gas venting. The DuraFlex 304 system is UL 1777 and ULC S635 listed, ensuring trusted safety, durability, and code-compliant performance.
Engineered for long-lasting reliability, the DuraFlex 304 stainless steel chimney liner improves chimney draft while protecting masonry flues from heat, moisture, and corrosive byproducts. It is an excellent solution for chimney restoration, fireplace inserts, furnaces, boilers, and oil appliance venting, delivering consistent performance with easy installation. Whether upgrading an aging chimney or installing a new venting system, this 20-foot flexible chimney liner offers dependable efficiency, professional-grade quality, and the trusted performance expected from DuraVent chimney products.
Features
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DuraVent 20' DuraFlex 304 Stainless Steel Flex Pipe: Premium 20-foot flexible chimney liner designed for dependable masonry chimney relining and long-lasting venting performance.
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304 Stainless Steel Construction: Manufactured from durable 304 stainless steel to provide excellent corrosion resistance, strength, and reliability in demanding venting applications.
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Compatible with Multiple Fuel Types: Designed for use with solid fuel, non-condensing gas, and oil-fired appliances, making it a versatile solution for various heating systems.
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Flexible Chimney Liner Design: The flexible stainless steel liner simplifies installation in masonry chimneys with minimal offsets while maintaining efficient flue gas flow.
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Improves Chimney Performance: Helps restore aging chimneys, improve draft efficiency, and protect masonry flues from heat, moisture, and corrosive byproducts.
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Ideal for Residential & Commercial Applications: Suitable for wood stoves, fireplaces, fireplace inserts, furnaces, boilers, and oil heating appliances.
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UL Listed Chimney Liner: Part of the trusted DuraFlex 304 system, UL 1777 and ULC S635 listed for safe, code-compliant chimney relining installations.
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Professional Chimney Restoration Solution: A high-quality flex chimney liner that delivers reliable venting performance and easy installation for new or replacement chimney systems
Specifications
| Model |
Size |
Flex Length |
| 3DF304-20 |
3" I.D |
20 ft. |
| 4DF304-20 |
4" I.D |
20 ft. |
| 5DF304-20 |
5" I.D |
20 ft. |
| 55DF304-20 |
5.5" I.D |
20 ft. |
| 6DF304-20 |
6" I.D |
20 ft. |
| 7DF304-20 |
7" I.D |
20 ft. |
| 8DF304-20 |
8" I.D |
20 ft. |
| Materials |
304 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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