DuraVent | Wall Support/Band Assembly 3"-12" Inner Diameter Type B Gas Vent

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Regular price$74.66 Sale price$93.33

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Size: 3"
⛟ Estimated Delivery Date: Between and to all states excl. Alaska & Hawaii.

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Elevate your venting game with the DuraVent DuraLock Wall Support/Band Assembly. In the world of venting solutions, DuraVent stands head and shoulders above the rest as the premier industry leader. Our commitment to innovation, safety, and professionalism has earned us a reputation that speaks for itself. When it comes to your HVAC and Hearth needs, accept nothing but the best.

The heart of the DuraVent DuraLock Wall Support/Band Assembly lies in our revolutionary DuraLock technology. Experience the satisfaction of a lock-tight connection like never before. As the alignment indicators meet, you'll feel the ends grasp together, and then, with an audible snap, the connection firmly locks into place. It's a game-changer in the world of venting, ensuring a secure and reliable connection every time.

Crafted from strong and durable galvanized steel, our outer pipe boasts internal spacing beads that ensure a uniform insulating air space between pipe walls. Each end is die-formed to guarantee uniform sizing, making connections a breeze. In Canada, select lengths are available in galvalume steel outer pipe, offering even more durability and versatility.

Safety is paramount, and the DuraLock Wall Support/Band Assembly embodies this principle. Its double-wall construction, with a pipe within a pipe, provides permanent insulation. This design keeps the inner pipe hot while maintaining the outer pipe's relative coolness. The result? Quick, robust vent action that minimizes condensation and prevents overheating of nearby enclosure surfaces.

Certified and Reliable

Rest easy knowing that DuraVent Model BV and BVO Type B Gas Vent have undergone rigorous testing and earned listings per UL 441 for installation as Type B and BW gas vents. Compliant with the standards of NFPA 54 and NFPA 211, these assemblies are suitable for installation in single and multi-story buildings. Your safety is our priority.


  1. Unmatched Connection: DuraLock technology ensures a secure and foolproof connection every time.
  2. Built to Last: Crafted from strong galvanized steel, it's designed to stand the test of time.
  3. Safety First: Double-wall construction prevents condensation and overheating for added safety.
  4. Certified Reliability: Tested and listed per UL 441, complying with NFPA standards.
  5. Versatile Support: Can support venting needs of up to 35'.

Key Features

  1. Rugged Construction: Die-formed ends and internal spacing beads for uniform sizing.
  2. DuraLock Technology: Revolutionary lock-tight connection system.
  3. Double-Wall Design: Provides insulation and prevents overheating.
  4. Certified: UL 441 listed for Type B and BW gas vents.
  5. High Load Capacity: Supports venting needs of up to 35 feet.


The DuraVent DuraLock Wall Support/Band Assembly is the ultimate choice for a wide range of applications:

  • Natural Gas Fireplaces: Enhance the safety and efficiency of your natural gas fireplace.
  • Gas-Fired Furnaces: Keep your gas-fired furnace operating at its best.
  • Boilers: Ensure your boiler system functions smoothly and reliably.
  • Water Heaters: Improve the performance and longevity of your water heater.
  • Wall or Space Heating: Ideal for wall or space heating applications.


Model Size
3BVWSB 3.625" (A) x 4.25"
4BVWSB 4.625" (A) x 4.25"
5BVWSB 5.625" (A) x 4.25"
6BVWSB 6.625" (A) x 4.25"
7BVWSB 7.625" (A) x 4.25"
8BVWSB 8.625" (A) x 4.25"
12BVSBA 13.125" (A) x 4.25"
Clearances 1" to combustibles in single and multi-family dwellings
Listings UL Listed to UL 441
Warranty Limited lifetime warranty


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 company’s research into solving problems with corrosion, when biofuels such as corn are used, led to the break-through patent for PelletVent Pro.

Order Confirmation:

Upon placing your order, you will promptly receive an email confirmation. Subsequently, we will conduct a thorough inventory check to ensure all items are in stock and available for immediate shipment. If your order aligns with the advertised delivery timeframe, we will promptly process it for shipment to our warehouse. In cases where the expected delivery time extends beyond the advertised timeframe, we will reach out to you via email and/or phone for confirmation.

Order Shipment:

Within one business day of your item being shipped, you will receive an email confirmation containing a tracking number. If you do not receive tracking information within six business days of placing your order, please don't hesitate to get in touch with us for assistance.

Estimated Time of Arrival:

Our typical delivery timeframe ranges from 2 to 10 business days. Custom-made products generally require 3 to 5 weeks for delivery. If the expected delivery date for your order would fall outside of the advertised 2-10 business day time frame, our customer service team will contact you to ensure your agreement with the revised timeline.

Covered Areas:

Please note that all estimated delivery dates and shipping costs advertised on our website apply exclusively to the Contiguous United States. For inquiries regarding shipping to Hawaii or Alaska, kindly reach out to our customer service team. While we do not offer direct shipping to Canada, we are more than willing to ship your order to the freight carrier of your choice.


It is very important that you inspect the packaging of your items when they arrive and check if you received all boxes listed on the delivery receipt. If you notice any damage or shortage of packages, you must make note of it on the bill of lading, take pictures, and refuse delivery. Your note should say "refused due to damage". You must also take photos of all sides of the box and send them to us within 2 days. If there are no damages visible before opening the box, you must note "subject to further inspection may contain concealed damage". If you notice any damage after receiving the delivery, do not throw the box away, and contact us with the photos. After we receive information from you about the refused delivery or concealed damage, we immediately initiate a claim with the shipping company or with the manufacturer. After the claim is fully processed, we ship all replacements at absolutely no cost to you.

Cancellations & Refunds:

We offer free order cancellations before the shipping label or Bill of Lading is generated, or prior to the commencement of production for custom orders. Please note that custom-made items are not eligible for refunds once production has begun. To be eligible for a return, the item must be unused and in its original condition, with all packaging intact and in perfect condition. Orders delivered outside of the United States are not eligible for refunds. If your order arrives damaged, please refer to the "Damages" section. Our refund policy extends for 30 days. If 30 days have elapsed since your purchase, regrettably, we cannot process a refund. Prior to returning an item, please contact us to discuss shipping details. All refunds will be credited to the original credit card or PayPal account used for the purchase, within two days of receiving the returned items at our warehouse.

Please contact sales@belleflame.com for any questions regarding shipping time.

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