DuraVent | DuraFlex AL Coupler 3″-4″ Inner Diameter Type B Gas Vent 3″
In the ever-evolving world of HVAC, where innovation meets necessity, one name stands tall - DuraVent. Our commitment to excellence has made us the undisputed leader in the venting industry. Today, we proudly introduce the DuraVent DuraFlex AL Coupler Type
In the ever-evolving world of HVAC, where innovation meets necessity, one name stands tall – DuraVent. Our commitment to excellence has made us the undisputed leader in the venting industry. Today, we proudly introduce the DuraVent DuraFlex AL Coupler Type B Gas Vent – a revolutionary solution designed to elevate your heating appliances and redefine efficiency. Step into the future of HVAC with us!
Benefits
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Effortless Connection: Seamlessly link DuraFlex AL lengths to PolyPro and experience unmatched convenience in your venting systems.
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Condensation Elimination: The aluminum inner pipe heats up rapidly, remaining hot during operation. Bid farewell to the damaging effects of flue product condensation.
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Versatile Compatibility: Connects DuraFlex Aluminum flex to any brand of B-vent, saving time and money during masonry chimney relining projects.
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Reliable Performance: Suitable for natural gas or liquid propane category I appliances, including fireplaces, furnaces, boilers, water heaters, and space heating applications.
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Proudly American-Made: Rest assured knowing that your DuraFlex AL Coupler is 100% manufactured in the USA, meeting the highest quality standards.
Key Features
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Universal Connection: Use it to connect DuraFlex AL lengths to PolyPro effortlessly, ensuring a secure and efficient venting system.
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Condensation Prevention: The aluminum inner pipe quickly heats up and remains hot during operation, preventing the formation of damaging condensation.
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Compatibility Matters: Connects DuraFlex Aluminum flex to any brand of B-vent, saving time and money on chimney relining projects.
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Safety First: Designed for use in combustion air only, guaranteeing safety and optimal performance.
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Made in the USA: Trust in American craftsmanship – our DuraFlex AL Coupler is proudly manufactured in the United States.
Applications
The DuraVent DuraFlex AL Coupler Type B Gas Vent is your go-to solution for a wide range of heating applications:
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Natural Gas Fireplaces: Ensure a safe and efficient venting system for cozy evenings by the fire.
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Gas-Fired Furnaces: Keep your home warm during the coldest months with reliable venting for your furnace.
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Boilers: Optimize boiler performance while safeguarding your chimney from condensation damage.
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Water Heaters: Enjoy hot water without worries, knowing your venting system is up to the task.
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Space Heating Applications: Whether it’s a garage, workshop, or any other space, count on DuraFlex AL Coupler for superior venting.
Specifications
| Model | Size |
| 3DFA-FCP | 3″ |
| 4DFA-FCP | 4″ |
| 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 |
Downloads
- Product Catalog
- Product Warranty
- Installation Manual
- Typical Installations
About the Manufacturer
Consistently the first to market with new innovations in venting systems, DuraVent has captured a leadership position in emerging markets. DuraVent has patents for several products and continues to design safe and technologically advanced venting.The companys research into solving problems with corrosion, when biofuels such as corn are used, led to the break-through patent for PelletVent Pro.

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