DuraVent | DuraFlex Pro Stainless Steel Tee Kit 35' Flex Pipe Length

Save $105.35
DuraVentSKU: 3DFPRO-35KT

Regular price$948.13 Sale price$1,053.48
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Size: 3"
⛟ Estimated Delivery Date: Between and to all states excl. Alaska & Hawaii.


Introducing the DuraVent 35' Flex Pipe DuraFlex Pro Stainless Steel Tee Kit – the pinnacle of venting solutions brought to you by the industry's leading name, DuraVent. With a rich history of engineering excellence, DuraVent has become synonymous with innovation, safety, and professionalism in the HVAC and Hearth markets.

This kit offers you a remarkable solution with 20% more stainless steel per foot compared to other liners in the market. Its unmatched flexibility makes complex installations a breeze, even in scenarios requiring multiple offsets. DuraFlex Pro is available in diameters ranging from 3" to 12", and it comes in various lengths, kits, and custom lengths to cater to your specific needs. Crafted from highly corrosion-resistant 316 Stainless Steel, it is both durable and reliable, fully compliant with UL 1777 and ULC S635 standards.

Need a custom length? DuraFlex has you covered with orders starting at just 10' minimum length. Additionally, DuraFlex Pro and DuraFlex SW offer diameters ranging from 9" to 12" when ordered in custom lengths. For all your 9"-12" flex systems, trust Ventinox components.

Key Benefits

  • Superior Durability: Built with 20% more stainless steel per foot.
  • Extreme Flexibility: Ideal for installations with multiple offsets.
  • Wide Diameter Range: Available in 3" to 12" diameters.
  • Highly Corrosion-Resistant: Manufactured from 316 Stainless Steel.
  • Compliance Assurance: Listed to UL 1777 and ULC S635 standards.

Key Features

  • Kit Flex Lengths: Choose from 15', 20', 25', 30', and 35'.
  • Comprehensive Kit: Includes DuraFlex SS Top Plate with Welded Storm Collar, DuraFlex SS Removable Vertical Cap, DuraFlex SS Tee with Cap, and DuraFlex Pro Length.


DuraFlex Pro is your ultimate solution for flexible chimney relining. Compatible with gas, wood pellet, oil, or wood appliances, its versatile applications include fireplace inserts, furnaces, boilers, and water heaters. Elevate the performance and safety of your heating system with the trusted quality of DuraVent.


Model Size Flex Length
3DFPRO-35KT 3" 35 ft.
4DFPRO-35KT 4" 35 ft.
5DFPRO-35KT 5" 35 ft.
55DFPRO-35KT 5.5" 35 ft.
6DFPRO-35KT 6" 35 ft.
7DFPRO-35KT 7" 35 ft.
8DFPRO-35KT 8" 35 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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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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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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