DuraVent - 5"-8" Inner Diameter DuraFlex Spacer

Save $11.40
DuraVentSKU: 5DFS-S

Regular price$102.58 Sale price$113.98
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Size: 5"
⛟ Estimated Delivery Date: Between and to all states excl. Alaska & Hawaii.


When it comes to venting systems, precision and safety are non-negotiable. That's where the DuraVent DuraFlex Spacer steps in – a vital component designed to elevate your installation experience. DuraVent, a name synonymous with excellence in the HVAC and Hearth markets, proudly presents this innovative solution to cater to your specific needs.

At DuraVent, we understand the importance of flexibility in venting solutions. That's why we've created the DuraFlex Spacer to provide you with a versatile, reliable option for maintaining the right clearance in various applications. Whether you're working with gas, oil, wood pellet, or wood appliances, rest assured that this spacer is your go-to choice.

Our DuraFlex Spacer is engineered to perfection, offering a 1-inch clearance for gas, oil, and pellet applications. It's your guarantee of safety and compliance with industry standards. For wood-burning scenarios, it provides a 1-inch clearance to masonry, ensuring your installations meet the highest safety standards.

Upgrade your venting system with the DuraVent DuraFlex Spacer – a small investment that makes a big difference. Experience peace of mind with a limited lifetime warranty, knowing you've chosen a product listed to UL 1777 and ULC S635 standards. When it comes to venting solutions, DuraVent leads the way, and the DuraFlex Spacer is no exception.


1. Versatile Clearance: Achieve the perfect clearance for gas, oil, and pellet applications, ensuring safety and compliance with ease.

2. Peace of Mind: Invest in a product listed to UL 1777 and ULC S635 standards, backed by a limited lifetime warranty.

3. Flexible Relining: Ideal for masonry chimney relining, suitable for use with fireplace inserts, furnaces, boilers, and water heaters.

4. Precision Engineering: Crafted with precision and care, the DuraFlex Spacer guarantees reliability and longevity.

5. Range of Sizes: Choose from various inner diameter options (5", 6", 7", or 8") to match your specific installation requirements.

6. Industry Leader: Trust in DuraVent, the premier company in the venting industry, for innovative, safe, and professional products.

7. Complete Venting Solution: Whether you're a professional installer or a DIY enthusiast, the DuraFlex Spacer completes your venting system for ultimate peace of mind.


  • Use to maintain a 1” clearance with flex sections of DuraLiner and DuraFlex SS.


DuraFlex SW smooth wall flexible relining for a masonry chimney. Use with gas, wood pellet, oil, or wood appliances. Applications include fireplace inserts, furnaces, boilers, and water heaters.


Model Size
5DFS-S 5" Inner Diameter x 3.25" Height
6DFS-S 6" Inner Diameter x 3.25" Height
7DFS-S 7" Inner Diameter x 3.25" Height
8DFS-S 8" Inner Diameter x 3.25" Height
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.

At Belleflame, we're committed to providing our customers with the best prices on the market. That's why we offer a 110% best price guarantee. If you find a better deal on the same product somewhere else, just let us know and we'll beat it by an additional 10%.

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.

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:

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