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Free Delivery on All Orders Over $75 - Curbside Delivery in 7-10 Days
Free Delivery on All Orders Over $75 - Curbside Delivery in 7-10 Days

DuraVent DuraBlack Increaser

SKU 5DBK-X6
Original price $64.47 - Original price $242.35
Original price
$64.47
$64.47 - $242.35
Current price $64.47

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DuraVent DuraBlack Increaser

The DuraVent DuraBlack Increaser provides a reliable solution for transitioning from smaller appliance flue outlets to larger chimney or stovepipe diameters, ensuring efficient and safe venting.


Key Features

  • Versatile Sizing: Available in sizes ranging from 5”-6” to 8”-10” to suit various setups.
  • Secure Connection: Designed to provide a tight, leak-free fit between appliances and venting systems.
  • Durable Construction: Made with high-quality materials for long-lasting performance.
  • Wide Compatibility: Compatible with most single-wall stovepipes and chimney systems.
  • Easy Installation: Simplifies transitions without the need for additional adapters.

Product Features

  • Flexible Applications: Perfect for use with wood stoves, fireplaces, and other hearth appliances.
  • High Heat Resistance: Built to handle the high temperatures generated by wood-burning appliances.
  • Professional Finish: Features a sleek black exterior to blend seamlessly with venting systems.
  • Standardized Dimensions: Precision-engineered for optimal performance and safety.
  • Enhanced Safety: Eliminates gaps to maintain proper draft and prevent leaks.

Product Specifications

Available Sizes

Specification Details
Brand DuraVent
Model DuraBlack Increaser
Material High-quality black steel
Sizes 5”-6”, 6”-7”, 7”-8”, 8”-10”
Part Numbers 5DBK-X6, 6DBK-X7, 7DBK-X8, 8DBK-X10
Stock Numbers 810000969, 810000987, 810001006, 810001022
Length (A) 6 1⁄8” (5”), 7 1⁄8” (6”), 8 1⁄8” (7”), 10 1⁄8” (8”)
Diameter (B) 5”, 6”, 8”, 9”
Certifications UL Listed
Warranty Limited Manufacturer’s Warranty
Product Downloads

Why Buy from Us?

Customer Service: Real People. Real Support

Our customer support team is based out of our home office in Southeastern Ohio. When you contact us, you will speak with a real person who is dedicated to assisting you in any way possible. There are no robots, teleprompts, or language barriers here.

Small Business Values

We are not a giant corporation that is only interested in its bottom line. As a small business, we aim to provide quality fire products at the best price possible. We want to give you a quality product at our best price. Your experience is more important to us than how much profit we will make from your purchase.

Ongoing Support

We continue our dedication to customer service even after your product has been delivered. We're always here to help! Whether you need an accessory, have questions about your purchase, or you are looking for parts... we're here to help!

Best Prices, Period.

We don't believe you should have to wait for a special holiday sale or "door buster" event. We always sell our products at the lowest possible price. And if you find a lower price elsewhere, we not only match it. We'll beat it!

Customer Service: Real People. Real Support

Our customer support team is based out of our home office in Southeastern Ohio. When you contact us, you will speak with a real person who is dedicated to assisting you in any way possible. There are no robots, teleprompts, or language barriers here.

Small Business Values

We are not a giant corporation that is only interested in its bottom line. As a small business, we aim to provide quality fire products at the best price possible. We want to give you a quality product at our best price. Your experience is more important to us than how much profit we will make from your purchase.

Ongoing Support

We continue our dedication to customer service even after your product has been delivered. We're always here to help! Whether you need an accessory, have questions about your purchase, or you are looking for parts... we're here to help!

Best Prices, Period.

We don't believe you should have to wait for a special holiday sale or "door buster" event. We always sell our products at the lowest possible price. And if you find a lower price elsewhere, we not only match it. We'll beat it!