DuraVent

DuraVent 25' Flex Pipe Length DuraFlex 304 Stainless Steel Basic Kit

$810.00
$810.00
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DuraVent 25' Flex Pipe Length DuraFlex 304 Stainless Steel Basic Kit

The DuraVent 25' DuraFlex 304 Stainless Steel Basic Kit is a premium chimney liner kit designed for efficient masonry chimney relining in residential and commercial heating systems. Featuring a 25-foot flexible 304 stainless steel chimney liner, this kit is ideal for wood-burning fireplaces, wood stoves, non-condensing gas appliances, and oil-fired heating equipment with minimal chimney offsets. Its lightweight, flexible construction allows for fast installation while providing dependable corrosion resistance and long-lasting venting performance. The DuraFlex 304 system is UL 1777 and ULC S635 listed, ensuring trusted safety, durability, and code-compliant chimney installations.

Designed for professional chimney restoration and venting upgrades, the DuraFlex 304 Basic Kit promotes smooth flue gas flow while protecting masonry chimneys from heat, moisture, and corrosive byproducts. This 25-foot chimney liner kit is an excellent choice for fireplace inserts, furnaces, boilers, and oil heating systems, delivering reliable draft performance and long service life. Whether replacing an aging chimney liner or upgrading an existing venting system, this DuraVent chimney liner kit provides exceptional quality, installation flexibility, and dependable performance.

Features

  • DuraVent 25' DuraFlex 304 Stainless Steel Basic Kit: Complete flexible chimney liner kit designed for professional masonry chimney relining and long-lasting vent system performance.
  • Premium 304 Stainless Steel Construction: Built from 304 stainless steel to provide superior corrosion resistance, durability, and reliable chimney venting in demanding heating applications.
  • 25-Foot Flexible Chimney Liner: Includes a 25-foot flex pipe length that is ideal for medium to tall chimney installations and restoration projects.
  • Available in Multiple Diameters: Offered in 3", 4", 5", 6", 7", and 8" diameters to fit a wide variety of wood stoves, fireplaces, fireplace inserts, furnaces, boilers, and oil appliances.
  • Multiple Length Options: Available in 15', 20', 25', 30', and 35' lengths to accommodate different chimney heights and installation requirements.
  • Designed for Wood, Gas & Oil Appliances: Compatible with solid fuel, non-condensing gas, and oil-fired heating appliances for versatile chimney relining applications.
  • Improves Chimney Performance: Enhances draft efficiency, restores aging masonry chimneys, and helps protect the flue from heat, moisture, and corrosion.
  • Professional Chimney Restoration Solution: Flexible liner design allows for easier installation in chimneys with minimal offsets while maintaining efficient flue gas flow.
  • UL Listed Chimney Liner System: Part of the trusted DuraVent DuraFlex 304 product line, UL 1777 and ULC S635 listed for safe and code-compliant installations.

Specifications

Model Size Flex Length
3DF304-25K 3" I.D 25 ft.
4DF304-25K 4" I.D 25 ft.
5DF304-25K 5" I.D 25 ft.
55DF304-25K 5.5" I.D 25 ft.
6DF304-25K 6" I.D 25 ft.
7DF304-25K 7" I.D 25 ft.
8DF304-25K 8" I.D 25 ft.
Materials 304 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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