DuraVent | DVL Double-Wall Black Stovepipe Increaser

Save $31.22
DuraVentSKU: 5DVL-X6

Regular price$124.88 Sale price$156.10
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Size: 5"-6"
⛟ Estimated Delivery Date: Between and to all states excl. Alaska & Hawaii.


DuraVent is the unrivaled leader in the field of venting solutions, known for its innovative, safe, and professional products catering to the HVAC and Hearth markets. When it comes to venting, trust the experts - choose DuraVent.

The DuraVent DVL Double-Wall Black Stovepipe Increaser is designed to be the perfect companion to your DuraVent chimney products, including DuraTech, DuraTech Canada, DuraPlus, or DuraTech Premium. Its double-wall, air-insulated design is engineered to reduce clearances to combustibles from a standard 18 inches to a mere 6 inches, making it the closest clearance to a wall available for any connector pipe. This not only improves safety but also provides you with greater flexibility in your stove's placement.

DVL isn't just about safety; it's about performance too. By maintaining high flue gas temperatures, it ensures a strong and steady draft. Thanks to its stainless steel inner wall, the flue heats up quickly, retains heat longer, minimizes creosote buildup, and boasts an impressive lifespan matching that of your chimney. Plus, adjustable lengths eliminate the hassle of cutting or crimping, simplifying installation.


  • Enhanced safety with reduced clearances to combustibles.
  • Improved stove performance for efficient heating.
  • Minimized creosote formation for easier maintenance.
  • Long-lasting stainless steel construction.
  • Simplified installation with adjustable lengths.

Key Features:

  1. Available in diameters of 6", 7", and 8".
  2. Robust 0.016” stainless steel inner wall.
  3. Outer layer crafted from 0.018” galvanized steel, painted black.
  4. Provides 6 inches of clearance to walls.
  5. Offers 8 inches of clearance to ceilings, even cathedral ceilings.
  6. Ideal for increasing from a smaller appliance flue outlet to a larger diameter chimney or stovepipe.


Model Diameter Dimensions
5DVL-X6 6" ID 6" (A) x 5.125" (B) x 7" (C)
6DVL-X7 7" ID 7" (A) x 6" (B) x 7" (C)
7DVL-X8 8" ID 8" (A) x 7" (B) x 7" (C)
6DVL-X8 8" ID 8" (A) x 6" (B) x 7.75" (C)
Application Double-wall interior stovepipe for connecting woodstoves to manufactured chimney
Listings c-UL-us listed to ULC S641 (MH14089)
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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