DuraVent | Pipe 25' Flex Length DuraFlex 316 Stainless Steel Tee Kit

Save $81.22
DuraVentSKU: 3DF316-25KT

Regular price$731.02 Sale price$812.24

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Size: 3"
⛟ Estimated Delivery Date: Between and to all states excl. Alaska & Hawaii.

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In the world of venting solutions, there's one name that stands head and shoulders above the rest: DuraVent. Renowned for its innovation, safety, and professionalism, DuraVent has become the undisputed leader in the industry, serving both HVAC and Hearth markets with a wide array of meticulously engineered products.

The DuraVent 25' Flex Pipe Kit, featuring premium 316 stainless steel, is a testament to excellence. Whether you're dealing with wood-burning, non-condensing gas, or oil-fired appliances, this kit provides the durability and corrosion resistance you need. Say goodbye to concerns about wear and tear, as DuraFlex 316 is your solution for harsher conditions, including coal-fired appliances.

Flexibility is key, and DuraVent understands that. That's why all DuraFlex products can be tailored to your specific requirements, with custom lengths available (minimum 10' length). Plus, for those larger systems, DuraFlex Pro and DuraFlex SW offer diameters ranging from 9" to 12" when ordered in custom lengths. When it comes to flexibility, DuraVent has you covered.


  1. Exceptional Durability: Crafted from 316 stainless steel, this kit is built to last in even the harshest conditions.
  2. Customizable Lengths: Tailor the length to your exact needs, ensuring a perfect fit.
  3. Corrosion Resistance: Ideal for coal-fired appliances and other harsh environments.
  4. Professional Finish: The kit includes a top plate, vertical cap, tee with cap, and length for a seamless installation.
  5. Versatile Applications: Suitable for fireplace inserts, furnaces, boilers, and water heaters, making it a versatile choice for various uses.

Key Features

  1. Available Kit Flex Lengths: Choose from 15', 20', 25', 30', and 35' kits to suit your specific project.
  2. Comprehensive Kit: The kit includes essential components such as the DuraFlex SS Top Plate with Welded Storm Collar, Removable Vertical Cap, Tee with Cap, and DuraFlex 316 Length.
  3. Easy Installation: Fast connect bands ensure a secure and hassle-free setup.
  4. Multipurpose Use: Compatible with wood-pellet, non-condensing gas, wood-burning, and oil appliances.
  5. UL 1777 and ULC S635 Listed: Tested and certified for safety and performance.


The DuraVent 25' Flex Pipe Kit finds its place in a multitude of applications:

  • Fireplace Inserts: Enhance the efficiency and safety of your fireplace with top-tier venting.
  • Furnaces: Ensure your furnace operates at peak performance with the right venting solution.
  • Boilers: Maintain an optimal heating system with DuraVent's stainless steel kit.
  • Water Heaters: Secure and efficient venting for your water heater.
  • Harsh Environments: Designed for use in the toughest conditions, including coal-fired appliances.


Model Size Flex Length
3DF316-25KT 3" I.D 25 ft.
4DF316-25KT 4" I.D 25 ft.
5DF316-25KT 5" I.D 25 ft.
55DF316-25KT 5.5" I.D 25 ft.
6DF316-25KT 6" I.D 25 ft.
7DF316-25KT 7" I.D 25 ft.
8DF316-25KT 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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