DuraVent | Type B Gas Vent Firestop Spacer 3"-8" Aluminum

Save $3.34
DuraVentSKU: 3GVFS

Sale price$13.40 Regular price$16.74
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Size: 3"

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Elevate your HVAC and hearth systems with the DuraVent 3"-8" Aluminum Type B Gas Vent Firestop Spacer. At DuraVent, we are not just a company; we are the industry leader, renowned for our commitment to innovation, safety, and professionalism. Our mission is to provide you with the most reliable and cutting-edge products, and this firestop spacer is no exception.

DuraVent's innovative DuraLock system ensures a secure, lock-tight connection for your Type B Gas Vent. With alignment indicators that meet seamlessly, ends that grasp together firmly, and an audible snap when the connection locks into place, you can trust that your venting system is rock-solid and reliable. Designed to withstand the rugged demands of the job site, our Type B Gas Vent boasts a recessed inner wall that eliminates damage during handling.

Our Type B Gas Vent is engineered to heat up rapidly, maintaining high temperatures during appliance operation while minimizing condensation in the appliance and vent system. Whether you need pipe lengths ranging from 6 to 60 inches or a variety of adjustable and rigid fittings, we have you covered. However, please note that Type B gas vents are not suitable for use with wood-burning or coal applications, industrial ovens, exhaust ranges and hoods, grease or pollution ducting, or as free-standing exhaust vents for high-temperature applications.


  • Enhanced Safety: DuraVent's DuraLock system ensures a secure, lock-tight connection for your Type B Gas Vent, providing peace of mind.
  • Rugged Durability: Designed to withstand the demands of the job site, our vent features a recessed inner wall, reducing damage during handling.
  • Efficient Operation: Our Type B Gas Vent heats up rapidly and remains hot during appliance operation, minimizing condensation for peak efficiency.
  • Versatile Sizing: Choose from a range of pipe lengths and fittings to meet your specific needs.
  • Industry Leader: DuraVent is the premier name in venting products, known for innovation and professionalism.


Model Size Dimensions
3GVFS 3" 3.75" (A) x 5.75" (B) x 7.75" (C)
4GVFS 4" 4.75" (A) x 6.75" (B) x 8.75" (C)
5GVFS 5" 5.75" (A) x 7.75" (B) x 9.75" (C)
6GVFS 6" 6.75" (A) x 8.75" (B) x 10.75" (C)
7GVFS 7" 7.75" (A) x 9.75" (B) x 11.625" (C)
8GVFS 8" 8.75" (A) x 10.75" (B) x 12.625" (C)
Clearances 1" to combustibles in single and multi-family dwellings
Listings UL Listed to UL 441 and UL 1777(MH6357), ULC listed to ULC S605 (CMH1276 & CMH1407).
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.

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At Belleflame, we believe that shopping should be simple, stress-free, and most importantly, enjoyable. That's why we work hard to bring you the best products, prices, and customer service in the industry.

Here are just a few reasons why you should choose us:

  • Wide Selection of Products: We offer a vast selection of top-quality products from the leading brands in the industry. No matter what you're looking for, we have something for everyone.
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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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We believe that shopping should be easy, convenient, and most importantly, affordable. That's why we work hard to bring you the lowest prices on the products you love. But if you do happen to find a better deal elsewhere, we'll go the extra mile to make sure you get the best deal possible.

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