DuraVent | DuraFlex Pro Stainless Steel 15' Flex Pipe

Save $43.16
DuraVentSKU: 3DFPRO-15

Sale price$388.41 Regular price$431.57
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Size: 3"

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Elevate your HVAC and hearth experience to new heights with DuraFlex Pro 15' Stainless Steel Flex Pipe. As the premier name in the venting industry, DuraVent has consistently set the standard for innovation, safety, and professionalism. Our commitment to excellence shines through in every product we offer.

DuraFlex Pro stands as a testament to our dedication. Crafted with 20% more stainless steel per foot than competing liners, it provides unparalleled strength and flexibility. This extreme flexibility makes it the ideal choice for installations requiring multiple offsets, ensuring a problem-free setup. With a range of diameters from 3" to 12", available in various lengths, kits, and custom options, DuraFlex Pro adapts to your unique needs. To guarantee long-lasting performance, we manufacture it using highly corrosion-resistant 316 Stainless Steel. Plus, it boasts UL 1777 and ULC S635 certifications, providing the peace of mind you deserve.


  1. Unmatched Strength: DuraFlex Pro's extra stainless steel per foot ensures durability and reliability in the most demanding conditions.
  2. Extreme Flexibility: Navigate tricky installations with ease, thanks to its exceptional flexibility, reducing installation hassles.
  3. Corrosion-Resistant: Crafted from 316 Stainless Steel, it resists corrosion, ensuring longevity and reliability.
  4. Versatile Sizing: Choose from a range of diameters, lengths, and custom options to suit your specific requirements.
  5. Certified Safety: With UL 1777 and ULC S635 listings, trust in the safety and quality of your venting system.


DuraFlex Pro is your ultimate solution for ultra-flexible chimney relining, making it compatible with gas, wood pellet, oil, or wood appliances. Its versatility extends to various applications, including:

Ideal Applications

  • Fireplace Inserts: Enjoy a warm, cozy atmosphere with efficient venting.
  • Furnaces: Enhance furnace performance for consistent heating.
  • Boilers: Optimize boiler efficiency, ensuring reliable hot water and heating.
  • Water Heaters: Upgrade your water heater for energy savings and peace of mind.


Model Size Flex Length
3DFPRO-15 3" I.D 15 ft.
4DFPRO-15 4" I.D 15 ft.
5DFPRO-15 5" I.D 15 ft.
55DFPRO-15 5.5" I.D 15 ft.
6DFPRO-15 6" I.D 15 ft.
7DFPRO-15 7" I.D 15 ft.
8DFPRO-15 8" I.D 15 ft.
Materials 316 stainless steel
Construction Single-Wall
Clearance 0” clearance for gas, oil, and pellet applications.
Clearance 1” clearance to masonry for wood-burning
Listings Listed to UL 1777 and ULC S635 (MH45609).
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.

Here's how it works:

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It's that simple! Our 110% best price guarantee ensures that you'll always get the best deal possible when you shop with us. So, why wait? Start shopping now and experience the difference of shopping with Belleflame.

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