DuraVent | DuraFlex 316 Stainless Steel Tee 15' Flex Pipe Length Kit

Save $61.53
DuraVentSKU: 3DF316-15KT

Regular price$553.74 Sale price$615.27
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Size: 3"
⛟ Estimated Delivery Date: Between and to all states excl. Alaska & Hawaii.


Elevate your HVAC and hearth experience with the DuraVent 15' Flex Pipe Kit. As the industry leader in venting solutions, DuraVent takes pride in offering innovation, safety, and professionalism. This kit, featuring the DuraFlex 316 stainless steel, redefines venting excellence.

DuraFlex 304 and 316 are the lightweight, cost-effective champions of venting. Perfect for chimneys with minimal offsets, they are the go-to choice for wood burning, non-condensing gas, and oil-fired appliances. When you demand greater corrosion resistance, especially in harsh conditions or coal-fired appliances, turn to DuraFlex 316. Rest easy knowing that both DuraFlex 304SS and 316SS are UL 1777 and ULC S635 listed for the utmost safety.


  1. Corrosion-Proof Confidence: Crafted from robust 316 stainless steel, this kit ensures long-lasting durability, even in challenging environments.
  2. Versatile Venting: Suitable for wood-burning, non-condensing gas, and oil appliances, this kit adapts to various heating needs.
  3. UL-Listed Peace of Mind: DuraFlex 304SS and 316SS hold UL 1777 and ULC S635 certifications, assuring you of top-tier safety standards.
  4. Customize Your Vent: Tailor your venting solution with custom lengths, accommodating different chimney configurations.
  5. Complete Kit: This kit includes essential components for a seamless installation, making it a hassle-free choice.


DuraFlex 316 flexible relining is the ultimate solution for masonry chimneys. Compatible with gas, wood pellet, oil, or wood appliances, it offers unmatched versatility. Whether you're upgrading fireplace inserts, optimizing furnaces, enhancing boilers, or replacing water heaters, DuraFlex 316 guarantees efficient, reliable, and corrosion-resistant venting.

Ideal Applications

  • Fireplace Inserts: Transform your hearth into a cozy haven with efficient venting.
  • Furnaces: Enhance furnace performance and keep your home comfortably warm.
  • Boilers: Ensure consistent heating and energy efficiency for your boiler.
  • Water Heaters: Upgrade your water heater to save energy and enjoy reliable hot water.


  • DuraFlex SS Top Plate With Welded Storm Collar: Seal the top of your masonry chimney and provide support for the flex. It's secured to the storm collar with a fast connect band.
  • DuraFlex SS Removable Vertical Cap: This cap terminates your relining system and attaches to the storm collar using a fast connect band.
  • DuraFlex SS Tee With Cap: Use it to attach to DuraFlex SS length with a fast connect band, ensuring a secure connection.
  • DuraFlex SS 316 Length: Specifically designed for use with wood-pellet, non-condensing gas, wood-burning, and oil appliances, this length ensures dependable venting performance.


Model Size Flex Length
3DF316-15KT 3" I.D 15 ft.
4DF316-15KT 4" I.D 15 ft.
5DF316-15KT 5" I.D 15 ft.
55DF316-15KT 5.5" I.D 15 ft.
6DF316-15KT 6" I.D 15 ft.
7DF316-15KT 7" I.D 15 ft.
8DF316-15KT 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.

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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