DuraVent

DuraVent 25' Flex Pipe Length DuraFlex 316 Stainless Steel Basic Kit

$895.00
$895.00
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DuraVent 25' Flex Pipe Length DuraFlex 316 Stainless Steel Basic Kit

The DuraVent 25' DuraFlex 316 Stainless Steel Basic Kit is a premium flexible chimney liner kit designed for safe and efficient masonry chimney relining. Constructed from highly corrosion-resistant 316 stainless steel, this 25-foot chimney liner system is ideal for solid-fuel appliances, wood stoves, fireplace inserts, non-condensing gas appliances, and oil-fired heating systems. Its flexible design allows for easier installation through chimneys with minimal offsets while maintaining excellent flue gas flow and reliable draft performance. The DuraFlex 316 Basic Kit is UL 1777 and ULC S635 listed, ensuring durable and code-compliant chimney venting.

Engineered for long-lasting performance, the DuraVent DuraFlex 316 stainless steel chimney liner provides enhanced resistance against heat, moisture, and corrosive combustion byproducts, making it an excellent choice for demanding applications such as coal-burning appliances. This 25-foot flexible chimney liner kit helps improve appliance efficiency, protect masonry chimneys, and support safe venting for fireplaces, furnaces, boilers, and wood-burning systems. Backed by DuraVent’s trusted chimney technology, it delivers a dependable solution for professional chimney restoration and relining projects.

Features

  • DuraVent 25' DuraFlex 316 Stainless Steel Basic Kit: Complete 25-foot flexible chimney liner kit designed for professional masonry chimney relining and reliable venting performance.
  • Premium 316 Stainless Steel Chimney Liner: Manufactured with durable 316 stainless steel alloy for enhanced corrosion resistance, strength, and long-lasting performance in demanding chimney environments.
  • Flexible Chimney Liner Installation: Designed to simplify installation through chimneys with minimal offsets while maintaining efficient flue gas flow and proper chimney draft.
  • Compatible with Solid Fuel Appliances: Ideal for wood stoves, fireplace inserts, and solid-fuel heating systems, providing a safe and efficient chimney venting solution.
  • Supports Non-Condensing Gas & Oil Appliances: Suitable for non-condensing gas appliances and oil-fired heating systems requiring dependable chimney relining performance.
  • Enhanced Protection for Coal Applications: The 316 stainless steel construction offers additional corrosion resistance when burning coal or sulfur-rich fuels, helping extend liner lifespan.
  • Available in Multiple Sizes: Designed for use with 3" to 8" diameter chimney liners to meet a variety of residential and commercial venting requirements.
  • UL 1777 & ULC S635 Listed System: Provides a trusted, code-compliant stainless steel chimney liner solution for safe chimney restoration projects.
  • Improves Chimney Efficiency & Safety: Helps protect masonry chimneys from heat, moisture, and corrosive flue gases while improving appliance performance.
  • Professional Chimney Relining Solution: Perfect for fireplace insert installations, chimney liner replacement, wood stove vent upgrades, and heating system applications.

Specifications

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

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