DuraVent | Pipe Length DuraFlex 25' Flex Pro Stainless Steel Basic Kit

Save $75.47
DuraVentSKU: 3DFPRO-25K

Regular price$679.23 Sale price$754.70
Flash Sale is ON! Free Shipping & Returns on All Orders. Get 15% off with the Code: FLASH15 for purchase over $199 and 19% off with the Code: FLASH19 for purchase over $8999. Best Deal Ever! Need Help? Call 800-466-4712 or mail us at sales@belleflame.com
Size: 3"
⛟ Estimated Delivery Date: Between and to all states excl. Alaska & Hawaii.


When it comes to venting solutions, there's one name that stands tall above the rest – DuraVent. With an unwavering commitment to excellence, DuraVent has solidified its position as the industry's leading provider of engineered venting products. Our latest innovation, the DuraFlex Pro Stainless Steel Basic Kit, is a testament to our dedication to quality and performance.

Crafted to meet the demands of professionals and homeowners alike, the DuraFlex Pro Stainless Steel Basic Kit redefines flexibility, strength, and reliability. Designed for a wide range of applications in the HVAC and hearth industries, this kit is a game-changer for those seeking a venting solution that is both robust and adaptable.


  • Unmatched Durability: The DuraFlex Pro Stainless Steel Basic Kit boasts 20% more stainless steel per foot compared to other liners on the market, ensuring exceptional longevity.
  • Effortless Installations: Its extreme flexibility makes it a breeze to work with, even in installations that require multiple offsets.
  • Versatile Sizing: Available in diameters ranging from 3" to 12", this kit suits a variety of applications.
  • Premium Materials: Crafted from highly corrosion-resistant 316 Stainless Steel, it's built to withstand the harshest conditions.
  • Certified Safety: Listed to UL 1777 and ULC S635, providing peace of mind for both professionals and homeowners.

Key Features

  • Kit includes flex lengths of 15’, 20’, 25’, 30’, and 35’, catering to your specific requirements.
  • Complete Kit Contents: The package includes a DuraFlex SS Top Plate with a welded Storm Collar, DuraFlex SS Removable Vertical Cap, DuraFlex SS Connector, and DuraFlex Pro length.
  • DuraFlex SS Top Plate with Welded Storm Collar: Seal the top of your masonry chimney securely and support flex effortlessly with this component.
  • DuraFlex SS Removable Vertical Cap: Effortlessly terminate your relining system and attach it to the storm collar with a fast connect band.
  • DuraFlex SS Connector: Easily connect your DuraFlex SS length to an appliance, rigid length, or flex length.
  • DuraFlex Pro Length: Ideal for use with gas, wood pellet, oil, or wood appliances.


Model Size Flex Length
3DFPRO-25K 3" I.D 25 ft.
4DFPRO-25K 4" I.D 25 ft.
5DFPRO-25K 5" I.D 25 ft.
55DFPRO-25K 5.5" I.D 25 ft.
6DFPRO-25K 6" I.D 25 ft.
7DFPRO-25K 7" I.D 25 ft.
8DFPRO-25K 8" I.D 25 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.

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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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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