DuraVent 25' DuraFlex AL Kit Flex Relining Type B Gas Vent Pipe
The DuraVent 25' DuraFlex AL Kit Flex Relining Type B Gas Vent Pipe is an economical flexible chimney liner system designed for masonry chimney relining applications with Category I natural gas and liquid propane appliances. This Type B Gas Vent compatible liner kit is ideal for gas fireplaces, furnaces, boilers, water heaters, and wall or space heating appliances, helping protect masonry chimneys from damaging flue gas condensation while improving venting performance and safety.
Engineered by DuraVent, a trusted leader in chimney and venting solutions, the DuraFlex Aluminum liner kit provides a lightweight and flexible installation option for various residential and commercial applications. Its durable aluminum construction offers reliable corrosion resistance and easy installation through existing chimney structures, delivering a cost-effective solution for gas appliance venting, chimney restoration, and Type B gas vent relining systems.
Features
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DuraFlex AL Flexible Chimney Liner Kit: The DuraVent 25' DuraFlex AL Kit Flex Relining Type B Gas Vent Pipe is an economical flexible chimney relining system designed for safe and efficient Type B Gas Vent applications.
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Designed for Category I Gas Appliances: Ideal for natural gas and liquid propane appliances, including gas fireplaces, furnaces, boilers, water heaters, and wall or space heaters.
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Available in Multiple Diameters: Offered in 3-inch to 8-inch diameters to provide versatile solutions for various masonry chimney relining and gas vent installations.
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Flexible Installation Options: Available in 25-foot and 35-foot flex lengths, allowing easier installation through existing chimney structures and accommodating different venting requirements.
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Protects Masonry Chimneys: Helps shield masonry chimneys from the damaging effects of flue gas condensation, extending chimney life and improving system reliability.
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Durable Aluminum Construction: Manufactured with lightweight aluminum flex liner material for dependable performance and cost-effective chimney restoration applications.
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Professional DuraVent Venting Solution: Engineered by DuraVent, a trusted name in chimney liners, gas vent systems, and HVAC venting products for residential and commercial installations.
Specifications
| Model |
Size |
Flex Length |
| 3DFA-25K |
3" I.D |
25 ft. |
| 4DFA-25K |
4" I.D |
25 ft. |
| 5DFA-25K |
5" I.D |
25 ft. |
| 55DFA-25K |
5.5" I.D |
25 ft. |
| 6DFA-25K |
6" I.D |
25 ft. |
| 7DFA-25K |
7" I.D |
25 ft. |
| 8DFA-25K |
8" I.D |
25 ft. |
| Vent Construction |
Double-Wall |
| Vent Type |
Type B Gas Vent |
| Materials & Const. |
010” aluminum (2-ply of .005”) |
| Clearance |
0” clearance to masonry |
| Listings |
Listed to UL 1777 and ULC S635 |
| Warranty |
Limited Lifetime Warranty |
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